Polyurethane Structural Foam

A space-age insulation used in passenger jetliners for the past 55 years, making it possible for aircraft to fly at great heights and in temperatures in excess of minus 50 degrees centigrade.

It is inert and has a closed cell homogenous structure that is fire retarded with no oxygen to carry flames, retaining its insulation values throughout its life, which to date has been checked at ages greater than 50 years without deterioration or delamination.

It is used in domestic refrigerators where the freezer section is normally at minus 22ºC, of course our insulation section is much thicker in our wall, roof and floor panels, giving exceptionally high insulation values.

Polyurethane structural foam (PUR) which is what Ecohousing use, should not be confused with the inferior expanded polystyrene foam (EPS).

Expanded polystyrene foam (EPS) not only posses a fire risk but is also targeted by vermin and insects. It has been found in roof panels which ants have eaten holes in the core weakening the roof panel. It will also melt when exposed to a hydrocarbon (fuel, insect spray etc.)

This will not happen to polyurethane. See our vermin resistance PDF

Ecohousing Injected Polyurethane cored Structural Sandwich Panels are pressure bonded to profiled roof sheets for Roof panels and waterproof Fibre Cement sheets for Wall Panels.

EPS Expanded Poly Styrene cored Sandwich Panels have the EPS core glued to profiled roof sheets for Roof panels and flat metal sheets for Wall panels.

Polyurethane Core between fibre cement in a wall panel

Polyurethane Core between fibre cement in a wall panel

Polyurethane core exposed in single faced panel, note core is hard to deform

Polyurethane core exposed in single faced panel, note core is hard to deform

Polyurethane Advantages Vs Polystyrene

POLYURETHANE
Yes/No
POLYSTYRENE
Yes/No
Cyclone Tested and passed
Yes No
Earthquake Tested and passed
Yes No
Fire Tested to 700° C Yes No
Structural Tested Yes No
Accepted by all Insurers Yes No
Can have Fibre Cement facings Yes No
Multi Story self-supporting Yes No
No delamination on transport Yes No
Termite and Ant proof Yes No
R Value 128mm Panel R-6.7 R-3.35
External walls masonry with trims Yes No
Internal walls smooth masonry Yes No
Can be used in cold moist climates NZ Tasmania with no absorption Yes No
Looks like any House not Kit Home Yes No


Ecohousing Building Systems Manufacturing Plant