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For GBI recertification every 3 years, please clarify the following;
  1. What is the rationale for recertification?
  2. How does the process work?
  3. Will all the originally awarded criteria points be reassessed?
  4. What is the role of consultants in this process?
  5. How much is the GBI registration fee for recertification?
  1. Recertification of GBI rated buildings serves to ensure that these buildings continue to perform sustainably during their life span.
  2. Clause 3.7 of your Agreement with GBI states;
    Renewal ASSESSMENT(S) shall be carried out by GBI every 3 years in order to maintain the validity of the GBI CERTIFICATE. The APPLICANT shall, as a condition precedent, make an application for the renewal assessment not later than 2 months before the expiry of the GBI CERTIFICATE. No reminders to this effect will be sent by GBIAP/GSB.
    Renewal Assessment will be for the same (original certificate) rating level, i.e. if the existing rating is Gold, then renewal shall be for Gold (though upon assessment the rating may drop to Silver or lower).
    Renewal Assessment is not applicable where an existing rated building wishes to seek for a higher rating level. Such buildings will be required to register for a complete new reassessment under the relevant Existing Building category.
  3. Buildings undergoing renewal assessment will be deemed to have maintained and sustained all the green criteria points previously awarded, and assessment will be conducted primarily to verify the dynamic criteria of utility consumption - energy, water and waste; and any minor changes made e.g. tenancy alterations affecting daylighting, views, pollutants et cetera. In essence, all credit points previously awarded will be reviewed and reassessed only if there are changes made. If no changes had been made, then the previously awarded points remain status quo for those criteria.
  4. The role of the various consultants, if appointed, will depend on the scope of works the owner wish for them to undertake.
  5. Fee payable to GBI for renewal can be viewed on GBI webpage under the tab "How GBI works". Please note that the renewal fees stated do not apply to application for a higher rating. For the latter, applicant will have to apply for a completely new assessment under the relevant Existing Building category.

15.2 Q RNC EE1
Our project, XXX Block B and P would like to pursue GBI certified rating. However, due to the current stage of construction our client finds it difficult to apply insulation to the roof and would appreciate if the RTTV requirements be set aside as after all it is not a prerequisite. We understand the importance of having roof insulation but given the current situation we would appreciate that your panel allow this credit to be waived. (our OTTV is however, achieving the requirements as per MS 1525).
  A For the current version of the GBI tools, there are no pre-requisite or mandatory requirements. Hence, for your particular project, if you unable to meet the full EE1 criteria, then you do not score on this criteria. To achieve GBI Certified rating, you will need to achieve a total score of at least 50 points from the other criteria
Please note that GBI will soon require mandatory compliance to EE1 in line with the gazette of such requirements under the UBBL 1984 Amendments 2012.

15.3 Q RNC SM2
For Residential NC tool: In the event that our development (a single family bungalow unit) will not be using public transportation even if readily available due to safety reasons (will be justified in later stages), is it possible that the 12 points stated here be transferable to Innovation Criteria instead?
  A The conditions for transfer of criteria points are as spelt out in the RNC Design Guide. If these conditions are not met, the points are not transferable. Please note that the impending revision of the RNC tool (Version 3) will dispense with transfer of points.
15.4 Q Low VOC Paints and Coatings
Referring to "Use low VOC paint and coating throughout the building. Paints and Coatings to comply with requirements as specified in international labeling schemes recognized by GBI", please provide more info.
  A Please refer to the table below for the not-to-exceed VOC limits for Paints and Coatings.
Product/Coating Type VOC Limit g/L (less water)*
Anti-Corrosive & Anti-Rust Paints
1. Gloss 250
2. Semi Gloss 250
3. Flat 250
Clear Wood Finishes, Stains, Primers, Shellacs, Floor Coatings
1. Bond Breakers 350
2. Clear Wood Finishes
- Vamish
- Sanding Sealer
- Lacquer

3. Clear brushing lacquer 680
4. Concrete curing compounds 350
5. Fire proofing exterior coatings 350
6. Fire retardant coatings
- Clear
- Pigmented

7. Floor Coatings 100
8. Graphic arts (sign) coatings 500
9. Industrial Maintenance (IM) coatings High Temperature IM coatings Zinc rich IM primers 100
10. Japans/faux finishing coatings 350
11. Magnesia cement coatings 450
12. Mastic coatings 300
13. Metallic pigmented coatings 500
14. Multicolour coatings 250
15. Pigmented lacquer 550
16. Pre-treatment wash primers 100
17. Primers, sealers, under coaters 200
18. Quick dry Enamels 50
19. Quick dry primers, sealers and under coaters 100
20. Recycled coatings 250
21. Roof coatings
 Roof coating, Aluminium
22. Roof primers, Bituminous 350
23. Shellac
- Clear
- Pigmented

24. Specialty primer 100
25. Stains interior 250
26. Waterproofing sealers 250
27. Waterproofing concrete/masonry sealers 450
28. Wood-preservatives 350
29. Low solids coatings 120

15.5 Q Low VOC Carpet and Flooring
"Use low VOC carpet or flooring throughout the building. Carpets to comply with requirements specified in international labeling schemes recognized by GBI. Other types of flooring to comply with requirements under Floor-Score developed by Science Certification System or equivalent". Please provide more info.
  A All carpets installed in the building interiors must meet the testing and product requirements of the Carpet and Rug Institute (CRI) Green Label Plus program. The carpets must not exceed the emission standards for total volatile organic compounds (TVOCs), 4-PC (4-Phenylcyclohexene), formaldehyde, and styrene. All carpet adhesives should not exceed the VOC limit of 50g/L (less water). All hard surface flooring which includes vinyl, linoleum, laminate, wood, rubber flooring must be certified as compliant with Floor-Score Test Standard or internationally recognized green label schemes accredited by the Global Eco-labelling Network (GEN).

15.6 Q Low VOC Adhesive and Sealant
"Use low VOC adhesive and sealant or no adhesive or sealant used". Please explain how low is low and reference standards.
  A Please refer to the table below for the not-to-exceed VOC limits for Adhesives and Sealants.
Architectural Application VOC Limit (g/L less water) Specialty Applications VOC Limit (g/L less water)
Indoor carpet adhesives 50 PVC welding 510
Carpet pad adhesives 50 CPVC welding 490
Wood flooring adhesives 200 ABS welding 325
Rubber floor adhesives 60 Plastic cement welding 250
Subfloor adhesives 50 Adhesives primer for plastic 550
Ceramic tile adhesives 65 Contact adhesives 80
VCT and asphalt adhesives 50 Special purpose contact adhesives 250
Drywall and panel adhesives 50 Structural wood member adhesives 140
Cove base adhesives 50 Sheet applied rubber lining operations 850
Multipurpose construction adhesives 70 Top and trim adhesives 250
Structural glazing adhesives 100    
Substrate Specific Applications VOC Limit (g/L less water) Sealants VOC Limit (g/L less water)
Metal to Metal 30 Architectural 250
Plastic foams 50 Non membrane roof 300
Porous materials (except wood) 50 Single-ply roof membrane 450
Wood 30 Others 420
Fiberglass 80    
Sealant Primers VOC Limit (g/L less water)    
Architectural, nonporous 250    
Architectural, nonporous 775    
Other 750    

15.7 Q MR6 Sustainable Timber
  1. We are from a wood flooring supplier in Malaysia and wish to seek clarification on the following criteria;
    RNC MR6 Sustainable Timber stipulates "Where ? 50% of wood-based materials and products used are certified".
    Please elaborate how does GBI justify the 50% of wood-based materials and products? Based on product value or quantity?
  2. These components include, but are not limited to, structural framing and general dimensional framing, flooring, sub-flooring, wood doors and finishes. To include wood materials permanently installed and also temporarily purchased for the project.
    Compliance with Malaysian Timber Certification Council (MTCC) AND Forest Stewardship Council (FSC) requirements.
    Can the developer be awarded 2 points under this criteria if say, the wood-based products used in the building are only partly certified. For example, certified cabinet/wardrobe, wood doors and sub-flooring but non-certified wood flooring.
  1. Criteria point in this instance is based on the value (50%) of the total wood-based material used in the project.
  2. Yes, IF at least 50% of the wood-based products used are certified and in compliance with Forest Stewardship Council (FSC) and Malaysian Timber Certification Council (MTCC).

15.8 Q Innovation point on Fire System water recycling during regular testing
Can the project score for Innovation point on Fire System water recycling during regular testing if wet riser is installed for only 1 (Blok M) out of the 12 blocks of residential building development, as listed hereunder;
  1. 4 Blok Rumah Bandaran 4 Tingkat (Blok A, B, C, D) ? 16 unit (Jenis Strata)
  2. 1 Blok Rumah Banglo Mewah 3 Tingkat (Blok E) ? 1 unit (Jenis Strata)
  3. 1 Blok Apartmen 5 Tingkat (Blok F) ? 4 unit (Jenis Strata)
  4. 1 Blok Apartmen 6 Tingkat (Blok G) ? 6 unit (Jenis Strata)
  5. 2 Blok Apartmen 7 Tingkat (Blok H & I) ? 20 unit (Jenis Strata)
  6. 1 Blok Pangsapuri 27 Tingkat (Blok M) ? 40 unit (Jenis Strata)
  7. 1 Blok Rumah Kelab 2 Tingkat (Blok K) (Kemudahan Masyarakat)
  8. 1 Unit Surau (Blok S)
  A If the whole development is registered under one certification, and at least one of the buildings is installed with either wet riser or sprinkler system or both systems and water recycling during regular testing is incorporated then the innovation point is given.
However, if the development is submitted under separate certifications, then only the building with the required system is eligible while the others are not.

15.9 Q RNC SM 2C
"Dedicated Transport Terminal within the Residential Area with covered seating and waiting area for a minimum of 10% of the total number of residential units of the designated residential area".
Will it be enough just to erect a transport terminal (the building itself), that fulfills the requirements above?
  A Yes. Please refer to the Design Reference Guide for details.

15.10 Q RNC SM3a
Will provision of a surau/prayer room instead of a surau be eligible for this point?
  A Prayer room provision is acceptable (to suit the size of the development) and provided it is for public use.

15.11 Q IN - Fire system water recycling during regular testing
Our development installed hose reel fire system for the residential buildings and sprinkler system for 2 floors of car parks. Are we eligible for this innovation point?
  A Water recycling must be provided for both Wet Riser system AND Sprinkler system where these are installed. Note that for high rise residential buildings exceeding 30.5m, Wet Riser system is required but not necessarily Sprinkler system. If water recycling is incorporated for the Wet Riser system serving the whole building AND the Sprinkler system serving the Car parks then this conforms to the credit requirement. If this building is less than 30.5m i.e. no Wet Riser system is provided, then recycling of the Sprinkler system serving the Car parks qualifies for the innovation point.
Please note that water recycling during regular testing is not applicable for hose reel fire system.

15.12 Q NREB SM1 - Energy Audit Report
What levels of energy audit report are we expected to provide?
  A The Energy Audit Report should serve its intended purpose of retrofitting/upgrading the existing building to achieve energy efficiency thereby contributing to greening the building.
You may refer to the following websites for scope of energy audit services;
www.maesco.org.my and/or www.greentechmalaysia.my

15.13 Q NRNC SM 9 & 10
Related Credit (NRNC) Detail Question Answer
EQ11 (High Frequency ballast) Tenant units will be given empty lighting point with no light fixture installed. Any recommendation from GBI? E.g.: House Rule for tenants? Recommendation to use high frequency ballasts? Similar to compliance for all other tenancy fit-out criteria, insert mandatory clause in S&P agreement, and also provide elaboration in the Building User Manual (SM13) to be given to tenants. Caution on losing point at CVA if not enforced for tenancy fit-outs.
IN1 (innovation) For landscape and compound lighting, instead of using conventional HPSV (high pressure sodium vapour) lamp, we intend to use LED for Landscape and compound lights with expected savings of more than 20%. How much energy savings impact would GBI recommend to be eligible for this innovation point? Eligible for 1 innovation point if there is substantial (impactful) landscape and compound lighting AND provided the LED lighting efficacy > 120 Lumens per Watt AND that the total building lighting load (fašade and interior spaces) does not exceed MS1525 requirement calculated on Watt per sqm of the internal floor area.

15.14 Q RNC Green Cost for SM4
Open Spaces, Landscaping and heat island effect. Are we eligible for Green Cost claim of 100% for such provision, or is there a base benchmark?
  A Not eligible for any claim for this criteria since if greenery is not provided, other finishes would have been provided which may even cost more.

15.15 Q NRNC - Designated Smoking Area
Propose to locate designated smoking area at basement carpark instead of outside of the building due to operation concern. As there is no shelter around the building except for the canopy in front of the main entrance, smokers will tend crowd around the main entrance during raining days causing congestion. Would like to know if this proposal is acceptable to GBI, since we can make use of the extract fans in the basement to extract the smoke out of the building.
  A Not Acceptable

15.16 Q IAQ Treatment system
Please explain why the following IAQ treatment solutions which can treat bacteria , microbial, mould and odour are not approved for GBI innovation points;
  1. Bio-kil treatment for AHU secondary filters
  2. Gelair (Natural tea tree oil Gel pack)
  A As a trained GBIF, you would be expected to evaluate and advise your client on the merits and demerits of 'potential' innovative items and not merely base such on claims by vendors. Meanwhile, GBI will continue to update approved innovation items as listed under FAQ11.

15.17 Q IAQ Treatment system
Is Electro-static filter with UV emitters eligible for 2 Innovation points (i.e. advanced filtration and IAQ treatment)? It is also stated that they should serve at least 50% of NLA but not mentioned whether for All AHUs?
  A Eligible for 2 separate Innovation points and both must be installed in all AHUs and serving not less than 50% of NLA. The 'at least 50% NLA' is intended to allow for non installation of Electro-static filter or UV treatment in FCUs, split units (and special justified cases) as such installation may not be practical. However, All AHUs should have such installation to provide improved IAQ for all tenants/floors and not selected tenants/floors, as the latter will constitute 'point chasing'.

15.18 Q NREB - Pest Control Management
Please advise on pesticide contents to be used in Green Buildings. Is there any standard published by GBI in controlling chemical content in pesticide products?
  1. Do not use banned chemicals.
  2. Encourage to avoid using chemicals and instead employ preventative means or alternative ways for pest control including mechanical or electronic means.
  3. Recommend to google "The IPM Practitioner" and similar.
Finally please bear in mind that GBI is a performance based rating system which requires the objective of each criteria to be met to earn credit points.

15.19 Q NRNC WE4
  1. Is it possible to use non certified WELS fixtures but instead tested by supplier and signed-off / witnessed by owners/consultants.
  2. Where different brands are independently certified by a labelling scheme, can mix and match of fixtures from different brands, for example W.C. from brand A and flush valve from brand B be acceptable as meeting the WELS performance?
  1. Please refer to FAQ 5.1
  2. No.

15.20 Q NRNC EE1
For an air-conditioned building of less than 4000m2, is it correct that there is no need to provide Energy Management System?
  A Correct, it is not mandatory to provide EMS in this case under EE1. However, to gain credit point/s under EE8, applicant must demonstrate alternative methodology of monitoring energy use for the purpose of EE improvement.

15.21 Q NRNC EE3
If a building energy usage does not exceed 100kVA, is it correct that there is no need for additional sub-metering?
  A The intent of EE3 is to ensure energy consumption can be monitored so as to enable implementation of energy efficient operations at all times. In this instance, if it can be demonstrated that one main meter (with no additional sub-meter/s since usage is <100kVA) is sufficient to monitor energy efficient operation of all energy consuming components, then this objective is met for the credit to be awarded.

15.22 Q NRNC EE8
For a small building of < 4000m2 GFA, I intend to install sub-meters for lighting, plug load and ACMV but no EMS. Is this eligible to score EE8?
  A The intent of EE8 is to provide for the ongoing accountability of building energy consumption over time. Hence, if it can be demonstrated that this objective can be achieved then the credit point will be awarded. Providing EMS (though this is not mandatory) is one option. Other possible options include - Installing e.g. timer switches and sub-meters in conjunction with proper and regular monitoring of energy use over time (through a dedicated energy management team/staff) can be suitable for this 'small' building.

15.23 Q NRNC or NREB
We refer to an existing building which was constructed for temporary use. The client intends to demolish it and construct a permanent structure. Everything will be demolished and removed, except for the portal frame structure and the underground services which will be reused. The layout and the floor area will change significantly. Since this is a Major Renovation, do we register under NRNC or NREB?

15.24 Q Electric Vehicle Charging Station
A landed property development with a total of 197 units, intends to provide 2 green parking bays equipped with EV charging station at the club house car parks. Total public car parks available are only 18 bays. Is this sufficient to earn 1 INNOVATION point under RNC?
We opine the 2 green parking bays is sufficient since visitors can also charge their EV at their friend/family?s house as it is a landed property development and public car park areas.
  A Acceptable

15.25 Q NRNC SM 12
  1. Can artificial grass be considered as vegetated roof in order to fulfill the requirements in SM 12?
  2. Should we consider green area at other levels beside roof in the total roof area tabulations?
  1. No.
  2. No.

15.26 Q Chiller Certification for Green Building
Must a Chiller performance fully comply with MS 1525 or other standard?
Please advise which agency can issue certification that a particular make of Chiller complies with GBI requirement?
  A Please refer to FAQ 2.16.

15.27 Q Innovation
  1. IN1- External Shading Devices
    Our marketing gallery is built around a tree which is investigated and certified as healthy by FRIM. The criteria of scoring external shading devices is to provide external shading devices for at least 50% of the glazed fašade. The passive design has approximately 40% external shading. The inner glazed fašade has natural shading from the tree. Can the shading provided by the tree be considered as an external shading effect?
  2. IN1- Vertical Green Wall
    The requirement for vertical green wall is to provide at least 10% of external wall/fašade with greenery. For a fašade that is 95% glazed, will the effort of providing vertical green wall on all the fencing contribute to the vertical green wall requirement?
  1. If the rationale is for provision as shading device, tree shading (and adjacent tall building shadow-shading) are not deemed to be 'permanent', and are hence not eligible for this innovation point.
  2. Fencing wall is not considered as part of the building facade. However, vertical greenery on fencing wall can contribute to SM12 which is highlighted in FAQ11.

15.28 Q GBI Application & Registration
Can we apply for GBI certification for only 4 blocks of shop office buildings of a development totalling 12 blocks?
  A GBI Certification may be applied for a single parcel or phase of a development. In this instance, in the GBI Certificate issued, GBI will identify the specific 4 blocks of shop office as the buildings which are rated under Green Building Index. Please also refer to FAQ 2.17.

15.29 Q RNC EE1
We have a landed residential project which has three different types of designs: terrace, semi-detach and bungalow. Under EE1, if one type of housing (say the bungalow) cannot achieve the 50W/m2 minimum OTTV requirement, does this mean we will not be awarded any points? Do we take the worst case scenario or is there a possibility to prorate the values based on percentage of area/units?
  A GBI is a building tool and OTTV for each building has to be calculated separately then tabulated and submitted. In order to score 3 points in EE1 (RNC V2), each individual building within the terrace type, semi-d type and bungalow type must achieve OTTV not exceeding 50W/m2. Pro-rating is not permitted.

15.30 Q RNC MR1 & NRNC MR5 ? Storage & Collection of Recyclables
Our system uses chute that is linked to a pipe and a storage container. We also have a dual chute and even a 3 chute system. The chutes are normally clearly labeled as; General Waste and Recyclable Waste. The user will have to throw all mixed recyclables into the Recyclable Chute and it will be vacuumed and then stored in a container. The container will be hauled to an off-site facility for sorting and recycling.
In the dual chute system, if the user deposits the material into the wrong chute, the system cannot rectify this error. Currently, there is no system in a building that can intelligently sort garbage. This requires MRF which is an off-site facility. The system also cannot sort garbage on site because the container is airtight and not meant to be opened on site. Even in a conventional method of collecting recyclable materials, there is a fair amount of contamination (wrong material in the wrong bin) that occurs.
Therefore, we kindly refer your attention to MR 1 & MR 5 where the use of the word minimum is of particular significance, as quoted "The waste that should be collected as a minimum should include aluminium, paper, plastics, glass, corrugated cardboard and batteries".
Does the word "minimum" in the excerpt above mean the building must have separate bins for the (minimum) 6 materials?
Can it be mixed into one bin instead whether using the AWCS or conventional method (Bin)?
  A GBI reiterates the need to understand the objective of each criteria for interpretation.
The objective is to be able to sort out a minimum of 6 materials and in a most practical way. Therefore, in practice for e.g. if the expected quantity of paper and corrugated cardboard can be contained in one bin, then there is no need for 2 bins at each collection point/floor to separately deposit these 2 items. These 2 items can subsequently be separated at the main sorting area. Hence, normally a total of 3 bins would suffice at each depository location.
Keep in mind that in line with the GBI objective, the materials must be re-cyclable. Allowing organic or liquid waste to be mixed into say paper waste or even glass waste such as bottles would immediately turn it into general waste as most re-cyclers would not accept contaminated materials which require an extra step of cleaning before they can be re-used. Materials can be mixed provided they can be readily separated before being re-cycled. This applies whether it is AWCS or conventional.

15.31 Q RNC MR6 ? Sustainable Timber
In order to score MR6, the timber flooring needs to comply with FSC and MTCC
Besides that, there are three different certificate issues under FSC which are:-
  1. Forest management
  2. Chain of custody
  3. Controlled wood
Two different types of certificates are issued under MTCC which are:-
  1. Forest management
  2. Chain of custody
Please advise if the timber flooring specialist needs to produce all the above certificates in order to score under GBI.
  A All the certificates listed must be furnished at the CVA submission stage.

15.32 Q Query on renewal of GBI Certification
Will the non-residential project be re-assessed using the NRNC tool or NREB tool?
  A If the CVA issued is based on NRNC then for renewal of certification after 3 years, the assessment can be based on the NRNC tool and credit points will be maintained for all unchanged criteria that cannot be re-verified (e.g. criteria for construction waste, selection of site, pollution control, etc.). However, criteria relating to building performance (viz daylighting, rainwater harvesting, greenery, energy & water consumption etc) will be re-assessed for compliance during the renewal process.
If the CVA is issued under NREB, then FAQ 6.21 applies.

15.33 Q Tax Exemption
A developer is constructing an office tower, and will be selling all of the office suites.
The developer is the "applicant" in the GBI application.
The developer is eligible for Tax rebate.
Is this statement correct?
  A Please refer to your professional tax consultant for verification to the following response
  1. The government tax incentive for green buildings refers to the Qualifying Green Cost incurred in achieving GBI certification.
  2. To be eligible for 'tax rebate', the developer must derive income from the building to set off against his profit from the income generated.

15.34 Q Tax Exemption
Numerous tax incentive references mentioned "...tax rebate and/or stamp duty?"
Does this mean a development can be eligible to obtain both?
Will the individual units also receive their GBI Certificate?
Will every unit be eligible for stamp duty exemption upon purchase from developer?
  A Stamp duty benefit is for the first purchaser and not the developer, and is also limited to the Qualifying Green Cost portion and not the whole selling price of the property.
Individual units will not be issued separate GBI certificates. A separate total Qualifying Green Cost certificate will be issued incorporating a tabulation of pro-rated Green Cost for each unit for their respective computation of stamp duty exemption.

15.35 Q RTTV Inquiry
I have a project with the top floors having floor to floor height of 16m to 30m and the roof is sloping with partial skylight. The calculated RTTV is 120W/m2. The OTTV is 36W/m2 with 0.6 WWR.
Due to the height of the roof, theoretically the heat radiated into the roof skylight will unlikely reach the human level height. The air-conditioned zone height is up to 4m. A roof ventilation system will exhaust hot air accumulating at the bottom of the roof.
With the system description above, can the RTTV calculation of 25W/m2 be excluded in EE1?
  A The fundamental purpose of limiting RTTV for roofs with skylight is related to energy efficiency in conjunction with achieving indoor comfort for the occupancy space below the skylight. The remaining non skylight roof is factored in to help reduce the average RTTV figure.
For the proposed design, the effect of solar gain through the skylight will not contribute to increased energy use for the space volume above occupancy level (in this case 4m is proposed through the application of low level displacement aircond).
The effect of radiated heat from the roof tapers off with increasing height and its direct effect on the human head level will become insignificant with an atrium height exceeding 17m provided the hot air is vented to relief accumulation of heat which will otherwise be convected/conducted downwards.
Hence, if the correct HVAC design strategy is adopted (LLD and hot air relief) then yes the RTTV compliance is not necessary.

15.36 Q SRI Value
Solid anodized aluminum sheet has been specified for a roof application and the architect requested for the SRI value.
The European manufacturer has forwarded a thermal emittance test report which according to the architect was not sufficient. (The manufacturer is the world largest anodizer with 40 years? experience in the market and has never been confronted with this specific request)
My question is in what way is the SRI important for the green qualification of a building? And what is the difference between the thermal emittance and the SRI?
  A The architect is absolutely right to ask for the SRI value as elaborated hereunder;
For a surface to stay cool, it needs two key attributes: reflectivity and emissivity. Reflectivity measures how well a material bounces back radiation. But since all surfaces absorb some heat, we also need to consider emissivity, or how good a surface is at radiating heat back out into space. The ?solar reflectance index? (SRI), defined by ASTM E 1980, incorporates both reflectivity and emissivity. The combination of reflectivity and emissivity means that light-coloured polymeric roof membranes and coatings, which are good emitters of heat, tend to perform better than metallic surfaces, which can be more reflective but which heats up more because of its low emissivity.
Please refer to Table 1 for better understanding of the 2 terms.
Material Emissivity Reflectance SRI
Typical New Gray Concrete 0.9 0.35 35
Typical Weathered* Gray Concrete 0.9 0.20 19
Typical New White Concrete 0.9 0.7 86
Typical Weathered* White Concrete 0.9 0.4 45
New Asphalt 0.9 .05 0
Weathered Asphalt 0.9 .10 6
* Reflectance of surfaces can be maintained with cleaning. Typical pressure washing of cementious materials can restore reflectance close to orginal value. Weathered values are based on no cleaning.
Table 1: Solar Reflectance index (SRI) for Standard Paving Materials

15.37 Q NRNC SM10
For SM10 - Parking Capacity, the architect has calculated the parking capacity required to be 1200. But since the project is located near a transportation hub, the client obtained a waiver of 50% for the parking capacity from local authority, reducing it to 600. A total of 670 parking spaces are now provided, hence I would like to ask if this still complies with GBI requirement? From calculation they are way below the parking capacity but after the waiver there are 70 excess parking.
  A Yes, this fulfills SM10 requirement.

15.38 Q NRNC EQ2
For EQ2 - Environmental Tobacco Smoke (ETS) Control, by locating the exterior designated smoking area on the roof top, does this comply with GBI requirement? Can the rooftop to be considered as an exterior area?
  A Yes, and the same distance to openings and air intake inlets apply.

15.39 Q U-value of RC Wall
GBI lecture notes on u-value computation list thermal conductivity, R for internal surface and external surface as 0.04 and 0.13 respectively and I had been using these values to compute the u-value for RC Wall.
However, I was requested by GBI to provide the thickness (m) and k-values for these internal and external surfaces for justification. Please advise.
  A The transfer of heat through walls (and also roofs) is impeded by the presence of a thin layer of relatively motionless air at the surface of the walls (and roofs). This thin air film offers some resistance to the heat flow and results in a temperature drop across the very thin layer of air.
The surface resistance caused by this thin layer air film is affected by wind velocity, the thermal emissivity properties of the material, and the angles of the wall and roof surfaces. Therefore different resistance values for outside (and also inside) air films are often quoted.
For the purposes of calculating OTTV and Roof U-values as required by MS1525 and the GBI rating tools, nominal values of surface resistances for walls and roofs given in the GBIF Course lecture notes are sufficient for use.

15.40 Q EQ12 criteria for Hospital
In a hospital, there are several rooms with their own lighting requirement such as wards and operating theaters. For operating theaters, usually these rooms are designed in a closed area for mould prevention due to health requirement. For item EQ12, is it acceptable if we just comply for office areas?
  A EQ12 promotes connectivity of the building occupants to the external environment. Subject to the reasoning in the submission documents, GBI will consider exempting areas which are prevented by operational requirements to comply with this criterion. GBI may also consider awarding innovation point if the applicant is able overcome their operational requirements creatively to comply with this criterion.

15.41 Q OTTV and RTTV
If the ratio between horizontal shading device and window glazing is smaller than 0.3, how to calculate the shading coefficient? In the GBIF Course Document, shading coefficient (SC) graph, the minimal shading-window ratio shown is 0.3-0.4.
Is RTTV calculation needed if the house area below skylight is not directly air- conditioned - staircase area, but other closed rooms like bedrooms are air-conditioned. The air-conditioned and non air-conditioned space are divided by internal walls and doors and windows.
  A If the ratio R1 for horizontal shading device is smaller than 0.3, as taught in the GBIF Course lectures, the SC value shall be taken as 1. In other words, the horizontal shading device is too small to have any significant effect on the shading of the window.
A RTTV calculation is needed if there is a skylight on the roof that allows direct solar heat gain into the house, whether or not that part of the house is directly or indirectly air-conditioned. The intention is to understand that a high percentage of solar heat gain comes through the roof, and therefore the design of the skylight on the roof must meet the requirements of MS1525. The calculation of the Roof U-value, to determine the amount of heat gain via conduction through the solid parts of the roof, must also be carried out to meet MS1525 requirements.

15.42 Q RNC SM2 Public Transportation Access Matter
Our project has constructed a ferry hub to access to Singapore. Can this be classified as a public transport hub?
  A Yes, it can be considered as a Transport Hub if there is another mode of transport (e.g. Bus) that intersects and connects. Note the need to also comply with other requirements of having adequate covered waiting area.

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