Specification & BOQ for “UNDERDECK INSULATION SYSTEM” with
“INSUBOARD” – Extruded Polystyrene Board

SCOPE:

This specification covers underdeck insulation system using the “Insuboard” extruded polystyrene thermal insulation boards.

General:

1. The area where underdeck insulation system needs to be installed shall be made free from all other activities that could disrupt the installation of the system.
2. All the products specified in this document shall be installed strictly in accordance with the manufacturer’s written instructions and by a specialist applicator approved by the manufacturer.
3. “INSUBOARD” to be used in the system shall be manufactured by SUPREME PETROCHEM LTD shall meet the key performance properties listed below against each.
4. The applicator shall ensure that the product in the system are received in good condition without damage and stored as per manufacturer’s instructions.

Key properties of the specified products:

​Property	Standard	​Unit	Value
Density	ASTM D 1622	​Kg/m3	​34-36
​Thermal Conductivity	​ASTM C 518-98	​W/m-K	​0.028
​Compressive strength	​ASTM D 1621-95	​Kpa	​≥300
Water Absorption by submersion (28 days)	​ASTM 2842	​% by Volume	≤ 1
Flammability	​DIN 4102 Part 1	​Building Material Class	B2 (difficult to ignite)

UNDERDECK INSULATION:

Providing and fixing under deck insulation system with Insuboard XPS (Extruded Polystyrene Thermal Insulation Board)of Supreme Petrochem Ltd, having thermal conductivity of 0.028 W/m.K, density 34-36 Kg/mtr.cub, compressive strength of > 300 kPa, water absorption of 0.2 % by volume,   B 2 grade fire compliance etc and in  size of 600mm width x 1250 mm Length x 75 mm  thick : square edge boards fixed in brick pattern : staggered joints with the help of  mechanical fasteners & a vapour barrier of cold bituminous compound or No More Nail of Bostik. The boards once fixed would be further reinforced with Glass  Fibre mesh & Fire retardant compound Insuset or equivalent ( Optional Item )

APPLICATION METHODOLOGY

• Surface cleaning & application of suitable adhesive compound on ceiling surface & Insuboard @ 0.25 kg per sq mtr.
• Fixing of the boards with Fasteners of appropriate thickness on all the four corners/centre & centre ( if required ) of the board.
• A layer of Insuset embedded with Fiber Mesh complete as per the instruction of engineer in charge: (Optional).

Budgetary Quotes :

​No.	Description	Unit	Rate	Qty	Amount
1	OVERDECK INSULATION	​	​	​	​
1.1	Providing and laying on the waterproofing layer Insuboard XPS- Extruded Polystyrene Board Insulation 50 mm thick, 34-36 Kg/Cum density having a minimum compressive strength of > 300 Kpa and water absorption less than 0.2 % by volume.	SQM	0.00	0.00	0.00
1.2	Providing and laying on the Insuboard XPS board geo-textile fabric of 150 gsm weight with 100 mm minimum overlap on the ends and sides as a separation layer.	​SQM	​0.00	​0.00	​0.00
1.3	Providing and laying on the separation layer cement sand screed of 1:4:8 with average thickness 50mm or kota stone or pre cast cement tiles on cement sand slurry with suitable grouting as directed by the Engineer in Charge. (In civil contractor's scope)    ​	SQM	0.00	0.00	0.00
-	TOTAL	​	0.00	0.00	0.00

Above rates are indicative and on per sqm basis only.
Taxes, Freight & Overlaps/Wastages will be extra.

MATERIAL - GENERAL DESCRIPTION:

Extruded Polystyrene boards to be manufactured from General Purpose polystyrene granules though an automated extrusion process free of CFC blowing agents : preferably with a blend of co2 & ethanol : low Global warming index : the boards are 100 % closed cell structure with a unique properties of high compressive strength & a stable thermal conductivity properties over the life cycle of building etc.

APPROVED SYSTEM:

The boards of size 600mm width x 1250 mm length & 75 mm thickness with square edge to be laid in brick patterns with the help of suitable bituminous vapour barrier or No more nail adhesive & mechanical fasteners of appropriate length with fixtures like rock wool sleeves at cut outs , Fire stop , foam filler  at the perimeter joints & wherever any opening etc are provided. The entire system has to be also protected with a suitable Fire rating improvement coating along with Fibre mesh etc as per the instructions of Engineer in charge complete in all respects etc.

FINISH (OPTIONAL):

Insuboard to be finished with Fibre glass mesh followed by protective coating Insuset 1.5 mm thick with the help of appropriate trowels & levelling tools : the coating improves the Fire rating properties of the over all under deck insulation systems.

THERMAL PERFORMANCE:

The extruded polystyrene under deck insulation system improves the thermal efficiency of the building by reducing the U value as per the prescribed norms in the ECBC codes depending on the type of building  in terms of hours of operations & geographical location. The thermal performance is very stable through out  the life cycle of the building. It improves the thermal comfort & also helps in optimising the loads thereby reducing the capex & operating cost of HVAC systems.

​FIRE PERFORMANCE:

XPS boards must be fully tested in accordance with DIN 4102 part 1 with regard to fire properties, flame spread , & surface burning characteristics . Also suitable Fire stops , sleeves, PU selant, Rockwool sleeves etc wherever there are electrical cut outs & opening. The boards must be of self extinguishing characteristic etc.

PROVISIONS FOR suspended ceiling fixtures etc:

​Suitable provisions & finishing to be provided with the help of can spayed PU wherever the boards are cut  in the ceiling or the perimeter to make the system seamless.

QUALITY ASSURANCE:

​The suspended ceiling system is to be manufactured within a recognized quality management system as per ISO 4898 & ASTM C 576 requirements. Each batch should also have the Raw material GPPS test certificates .