If you are thinking of putting siding on your house, it is as important to know what goes under the siding as it is to know the quality of the vinyl siding itself. Obviously, you wouldn't dream of buying an automobile without looking under the hood.
Any building is only as good as the foundation that it is built upon.
Yet millions of home owners have had vinyl siding installed without a thought about the foundation or underlayment beneath the siding which is vitally important to the future appearance of their home. ThermoWall was created to make vinyl siding solid, to support the profile, and to prevent sagging, while keeping the laps flat and closed. All siding, when properly and carefully installed, will give you a new home at the same address the day the job is completed. Because vinyl siding has a tremendous expansion and contraction ratio, it is not nailed, but needs to be hung so that it can expand or contract or, literally, float. But the fact is that behind your siding is nothing but air.