Is sheathing required behind clapboard exterior wall?
I have a 1971Lancer double wide mobile home with hardboard exterior walls that seem to be toxic. I am sensitized to chemicals due to chronic pain and fatigue. The hardboard has a strong petrochemical aroma when the sun heats it; or when i open up the wall space, such as when working on an 120v wall box. I have been around all the other house components before (vinyl, paint, carpeting, MDF, etc) and have finally realized its the hardboard that is the main culprit.
So i want to remove the hardboard and put on another exterior wall surface. I went to a cedar clapboard-maker site and they recommend placing sheathing over wall studs; then vapor barrier; then cedar clapboards. My existing wall has no sheathing and no vapor barrier. I have no perimeter support foundation other than hardboard skirting on flimsy 2x4 framing, most of which is not anchored or only loosely anchored to crumbling concrete footer.
I'd like to keep the replacement wall as light as possible, since the existing 1/2" hardboard wall (4' x 7.5' panels) has 2x3 studs on 16" centers and is light-weight. I'm considering building a partial-load-bearing perimeter foundation wall with 2x6 framing on a masonry/concrete footer. BUT keeping my overall costs low is a big consideration. I like the idea of real wood siding; horizontally placed clapboards would allow me to re-use my existing 2x3 studs(?)
What are some least expensive solutions using non-toxic components you can suggest for my exterior wall surface? I'm in a relatively benign climate area of California with 22" of annual precipitation; and only about 10 weeks of night-time freezing temps in winter, little snow. THANKS, JT
Posted Fri, 04/18/2014 - 15:56
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