Yes. And tests indicate Thermapan SIPs are significantly
stronger than conventional 2x4 or 2x6 walls.In fact, houses
built with Thermapan SIPs have withstood the force of Class
6 hurricanes, such as Andrew, Hugo and Mitch.
No. Thermapan SIPs use a standard system that makes them easy to assemble and extremely cost effective. One of the key benefits of the Thermapan system is its design flexibility. SIPs can work with any number of window and door combinations. Thermapan's reference manual also makes the installation of windows and doors straightforward and simple. View the Door & Window Openings segment of our Installation Video and see how easy it really is.
You will need regular carpentry tools plus a hot knife and
expanding foam. A hot knife is a tool for holing out grooves
in the EPS, and is needed whenever SIPs must be cut to size.
Hot knives are easy to use and can be purchased or rented
from Thermapan. Expanding foam is used to seal all connections
between individual SIPs and top and bottom plates thus ensuring
the structural integrity of the system. For a full list of
SIP tools that Thermapan can supply, visit our Accessories page.
With 1/2" gypsum board, SIPs have a 15-minute fire
rating which meet residential fire code regulations. Thermapan
SIPs also meet the National Building Code of Canada. As
with any fire resistance issue, however, requirements vary
by region, occupancy and building classification. You should
contact your local building or fire departments to determine
the necessary requirements and ensure compliance with local
The answer to this question is while technically yes, effectively
they do not. This is because the amount of formaldehyde emitted
by the oriented strand board (OSB) used in SIPs is less than
0.1 PPM (parts per million). This is well below accepted levels
established by the U.S. Department of Housing and Urban Development
(HUD). Additional details and test results can be found in