Mold – If mold appears inside your exterior walls or on your exterior siding, you may be suffering from the biggest mistake made in wood construction today: airtight envelopes. Airtight vapor barriers keep moisture-laden air from migrating through the wood framing, then the trapped moisture rots the wood. Contrary to what many “experts” say today, the solution is NOT tighter construction—because you can NEVER get rid of all the moisture and wood needs to “breathe” to keep from rotting. The only way out of this dilemma is radical surgery.
Choice #1: Strip the siding, replace the Tyvek with tarpaper that allows air to infiltrate between its seams, and install new siding.
Choice #2: Strip the siding, replace the Tyvek with tarpaper that allows air to infiltrate between its seams, and install new siding.