Our home builder (Adair Homes, Inc.) omitted a weather barrier which allows rain water to enter our home through the siding and causes mold to grow under our carpets, and they refuse to pay for the repair.
The home is contructed of 2 x 6 walls, which has 1/2 inch thick Duramate foam rigid insulation on the exterior side, on top of which is Louisiana Pacific SmartPanel siding (4' x 8' sheets). There is no OSB on the walls. The wind-driven rain enters into the seams of the siding and finds its way onto the subfloor.
The Duramate foam was installed with gaps in between each 4' x 8' panel, and the bottom of each panel stops at the top of the subfloor. There is no flashing.
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