Methodology of Under Deck insulation with INSUboard- XPS
Extruded Polystyrene Thermal Insulation Boards

INSUboard – Extruded Polystyrene (XPS) Thermal Insulation Board is a rigid foam Board, free from CFC and HCFC Blowing agents, having closed cell structure and is produced in a fully automated continuous extrusion process in accordance with international specification and standards.

INSUboard – XPS is a Special and High performance insulation material with High Compressive strength, Higher Thermal Resistance ( R Value) and Low Water absorption makes it an ideal insulating material.

Description of Item - INSUboard

Providing and laying INSUboard – ( XPS) Extruded Polystyrene Thermal Insulation Boards of desired thickness manufactured by Supreme Petrochem Ltd having thermal conductivity as per ASTM C 518 of 0.0289 W/MK , the compressive strength at 10% deflection as per ASTM C 1621 should be more than 350 Kpa , ( incase of 40mm and above thickness) and 240 to 290 in case of 25 to 30 mm thickness.

Density should be minimum 34kg/cum as per ASTM D 1622, Water absorption % by volume as per ASTM C 272 should be < 1%, Flammability as per DIN 4102, Part-1 of class B2. Special Grade of Flammability as per FR B1 is also available against request, Which comply with ASTM C 578 Class VI Standard requirements.

Advantages of INSUboard (XPS)

1) Very Easy to install.
2) Free from CFC and HCFC.
3) INSUboard - XPS is a rigid foam board having closed cell structure
4) Negligible water absorption – No loss in Thermal Conductivity.
5) Very High Compressive Strength.
6) Light-weight & easy-to-handle.
7) Long term durability.
8) No capillarity, high moisture resistance.
9) High Insulation Value long term..
10) Lower Global Warming Potential
11) Resistance to growth of bacteria & micro-organism.

R & U Value Calculation of different thickness of INSUboard -XPS

Scope of the Work

Supply of installation of under deck thermal insulation with Rigid closed cell INSUBOARD – XPS – Extruded Polystyrene Insulation foam board of desired thickness ( 25mm/ 30mm/40mm/ 50mm) having thermal conductivity of 0.028 w/m-k manufactured by Supreme Petrochem Ltd including cleaning the surface, fixing INSUBOARD Boards to ceiling by using Polypropylene Fasteners/ Plastic/ PVC Fasteners/ S S Fasteners of suitable size with 50mm diameter of SS / Plastic/ PVC Disc head.

​The board shall be as per ASTM C518, compressive strength of 240 to 350 KPA as per ASTM D1621, Compressive Strength over 250 kPA as per ASTM D1623 and flammability of class B2 OR Class B1 as per DIN4102, water absorption of <1 % as per ASTM D2842.

Application Methodology

A. Preliminary work/ Precautions:

All suspenders (Drops) for providing False ceiling work to be completed before starting our insulation work in order to avoid damage to our Insuboard . Only Suspenders ( Drops) to be completed.​

(Grid/ Frame work to be started only after completion of our INSUBOARD application in case required if there is any false ceiling work is planned).
The size of our INSUBOARD – XPS - Extruded Polystyrene Thermal insulation board is 1250mm x 600mm with desired thickness with Ship lap joints for the continuity of thermal insulation. ( To avoid thermal bridges).
 
B. Under deck Ceiling Insulation:

After completion of the Suspenders/ Drops of electrical conduits or any other utilities as per site requirements.

1) Clean the ceiling surface with wire brush. The ceiling should be properly leveled and plastered, if required, and free from fungal growth, paint flaking, efflorescence, dampness and any other such deleterious conditions. Loose particles if any to be removed completely.

2) Drill holes on RCC and insert rawl plugs forming a grid of 1 x 0.5 mtr size.

3) Marking on the INSUBOARD and Fixing the Board to the ceiling with Polypropylene/ Stainless Steel fasteners/ Plastic/ PVC Fasteners of minimum length of 30 to 40mm on and above the thickness of Insuboard ( The length of the fasteners should be Insulation Thickness plus 30 to 40mm). Mechanically fastened to the rawl plugs as per the grid prepared by inserting INSUBOARD through the suspenders/ drops wherever required. Using 5 numbers of Fasteners/ Screws of more than 80 mm length  per  Board   for  fixing  each  Insuboard  of  1250  mm  X  600  mm  ( 4 Fasteners at the corners and 1 at the centre of the Board). Polypropylene /Stainless Steel Disc head of minimum 50mm diameter to be placed on the bottom side of the Insuboard after mechanically fastening to hold the Insuboard properly with the help of Fasteners.
4) Insuboard to be fixed on the ceiling with Mechanically fastening system with Polypropylene / Stainless steel fasteners/ screws proper length as explained above.

5) Insuboard to be installed on Staggered pattern on the ceiling.

6) In case, if there is any Electrical conduits are running on the ceiling, Wherever Electrical conduits are mounted and are running on  the  ceiling, for the continuity  of the insulation, has to be properly sealed  with additional layer of Insuboard with extra width  of  more  than 100mm on both sides of the conduits and which shall be fixed  to  the  first layer of Insuboard with fasteners/ screws of 100mm to  110 mm  with washers and to the ceiling with the help of rawl plugs already prepared on the ceiling.

7) All the joints on the INSUBOARD shall be installed with interlocking system with each board with the help of inbuilt ship lap joints provided on the  board ( Available in 30 mm and above thickness).
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