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Opinions on Install Method
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<blockquote data-quote="Sharpend" data-source="post: 477391" data-attributes="member: 17152"><p>The ones we did had a breathable membrane on the exterior of the OSB then the studs at approx 140mm this was filled with celotex which was 120mm ish thick which left a small void, we would then either put a timber nog across between studs to mount the back boxes which were 35mm or use a metal strip to fix the back box (the name is which escapes me) the fronts were then double boarded with 15mm boards. Externally the walls were brick faced with I believe insulation between bricks and osb. When each house was checked for air tightness not one failed. Mind every joint floor to wall was sealed with mastic also. </p></blockquote><p></p>
[QUOTE="Sharpend, post: 477391, member: 17152"] The ones we did had a breathable membrane on the exterior of the OSB then the studs at approx 140mm this was filled with celotex which was 120mm ish thick which left a small void, we would then either put a timber nog across between studs to mount the back boxes which were 35mm or use a metal strip to fix the back box (the name is which escapes me) the fronts were then double boarded with 15mm boards. Externally the walls were brick faced with I believe insulation between bricks and osb. When each house was checked for air tightness not one failed. Mind every joint floor to wall was sealed with mastic also. [/QUOTE]
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