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Thread
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Topic: Use Tyvek?
Author: T. Hearn
Date Posted: 10/16/2001
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I am in the middle of framing a 27' by 10' one floor addition to a two story 1950 brick colonial house in the Washington D.C. area. Most of the addition exterior is windows and french doors, so the amount of wall area perimeter (8'high) to be sheathed totals about 14 feet (in section between windows and doors that are approximately 3' to 4' long).
The builder is planning to use Tyvek as a vapor retarder. Says he always does. Based on a 2/12/00 comment by Joe Suspinski, it sounds like Tyvek may not be right because only the addition would have it, not the rest of the house. It sounds like such an application could cause condensation to occur behind the housewrap and pretty quickly do serious damage to the sheathing and framework.
In such applications, non impregnated building paper is recommended. Right? I checked at a lumber yard/building supply place. The only non impreg BP they had was red rosin paper (usually used in flooring) which they said was not appropriate for covering sheathing. Is there another non impreg BP I should aske for? Could I go with no covering over the sheathing?
T. Hearn
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