4 use r 10 when applied continuously against the wall.
Fairfax county attic insulation code.
Please illustrate or otherwise provide information to show compliance with applicable code requirements.
The term habitable attic is relatively new to the residential code.
2015 r202 r301 5 blocking between the trusses when using a roof design incorporating a raised roof rafter or truss heel blocking is required.
The r value of an insulation material is usually listed in terms of r per inch.
A finished or unfinished attic that has all the makings of a living space is a habitable attic.
Attic habitable it appears that this design meets the definition of attic habitable.
For example cellulose attic insulation has an r value of r 3 7 per inch.
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R402 2 4 attic hatches.
For any thickness the total r value equals the rated r per inch multiplied by the thickness in inches.
Fairfax county virginia land development services building officials blog.
3 use r 8 when insulation is applied to the exterior.
A 6 inch thick installation will therefore have a total r value of r 22 2 6 inches x 3.
5 insulation must extend from the slab edge to a length of 24 inches vertically and or horizontally.
Table r402 1 2 change cz4 ceiling insulation levels to r 38 and cz4 wood frame wall requirement to r 15 or r 13 r 1.
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The code for land development is administered by fairfax county s department of land development services.
Use r 13 when applied between studs or furring strips.
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