Methodology of Cavity Wall  Thermal insulation with INSUBOARD- XPS
(Extruded Polystyrene Thermal Insulation Boards)

INSUBOARD – Extruded Polystyrene ( XPS) is a Rigid foam Board having closed cell structure and is produced in a fully automated continuous extrusion process in accordance with international specification and standards.
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INSUBOARD – XPS is free from CFC and HCFC is a Special and High performance insulation material with high compressive strength and very low water absorption makes an ideal and best insulation material for foundations, walls, roofs and floors  worldwide

Description of Item - INSUBOARd

Providing and laying  INSUBOARD – ( XPS) Extruded Polystyrene Rigid Board 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 250 kpa , Density should be 34-36 kg/cum as per ASTM D 1622, Water absorption % by volume as per ASTM C 272 should be < 1%, Water permeability as per ASTM E 96 should be 63 ng/Pa.s.m2, Flammability as per DIN 4102, Part-1 of class B2 and Oxygen Index % as per ASTM D2863 in the range of 24.

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

Advantages of INSUboard (XPS) 

​1) XPS is rigid foam board having closed cell structure.
2) Constant thermal conductivity in all climates.
3) Negligible water absorption.
4) High insulation property with less thickness.
5) Very good compressive strength.
6) Lower Global Warming Potential.
7) Lower K value & Higher R value.
8) Light-weight & easy-to-handle under site conditions.
9) Resistance to bacteria & micro-organism growth.

About a third of all the heat loss in an un insulated buildings escapes through the walls.

Cavity Wall insulation is often recommended as an ideal way to conserve energy and lower your monthly bill. Cavity wall insulation is installed primarily for ventilation and heat loss reduction that can be brought by the cavity between the walls.

​It also preferred by end user because it can help to reduce energy consumption as well as acts as a shield to prevent rain water from penetrating the outer wall and getting inside the building.

Application of INSUboard on Cavity Wall Insulation

INSUboard can be used for cavity wall insulation in any type of building. Cavity Wall application can be used in commercial OR Residential Buildings, Cold Storage’s etc.

Advantages of Cavity Wall Insulation System

1) Restriction of moisture passing through the wall.
2) Better thermal insulation, which leads to better thermal comfort

A Brief Methodology 

​“Providing and fixing on the External Wall from inside, INSUboard - XPS- Extruded Polystyrene Board Insulation  50 mm thick, 34-36 Kg/Cum density, thermal conductivity of 0.0289 W/m.K, having a minimum compressive strength of > 250 Kpa and water absorption less than 1 % by volume. Providing an air cavity of 25 mm before building another Brick / AC Block wall as final finish, as per the directions of the engineer in charge.

Cavity Wall insulation method for INSUboard

Supplying & application of 50 mm thick INSUboard (XPS), Extruded Polystyrene Board, 34-36 kg/m3 density, > 250 kpa compressive strength & thermal conductivity 0.0289 w/m.k, of size 600 mm x 1250mm.

INSUboard is to be installed on external wall  from inside by mechanical Fastening system with the help of screws/ fasteners on all the four corners & center of the board.,
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After that, leaving an air gap of 25mm, Internal brick wall or A.C. Block wall can be made for final finish.

Finalizing INSUboard for cavity wall insulation

For Cavity Wall Insulation application,Boards in lengths of 600 mm x 1250 mm are practical, as they are easy to handle at site and are convenient to transport and shift at site during installation.
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Consult your nearest INSUboard Sales office/ Technical Team for advice concerning the appropriate thickness of INSUboard required for your application.

Site Handling Instructions

INSUboard must be stored in a shaded area on wooden pallets neatly covered by a thick fabric and tied securely in a manner that will minimize exposure to sunlight and UV. Excessive exposure to sunlight, UV and other sources of heat will result in considerable deterioration of the product and reduce its thermal and physical properties.
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The Boards are packed in plastic bags to avoid any damage during transit or at the site. Care should be taken while handling / transporting to avoid puncturing and damaging the joints, shiplap, edges and surface of the INSUboard.