2007-10-08 14:00:12 · 3 answers · asked by dwm 1 in Home & Garden ➔ Do It Yourself (DIY)
if in the uk the correct amount is 250mm ..10 inches in old money...this is of coarse the thickness to comply with building regs
2007-10-09 05:33:46 · answer #1 · answered by boy boy 7 · 0⤊ 0⤋
Calculate the width of the attic and multiply by the length and then ask your lumber store how many square feet of insulation is in a package. For example, if you want R20 insulation that is 16" wide, there may be 50 square feet in a bundle. If your attic is 20X40 feet you have 800 square feet of attic divided by 50 is 16 bundles.
2007-10-08 14:53:03 · answer #2 · answered by Mustbcrazy 3 · 0⤊ 0⤋
you need at least 6 inches of insulation in the attic, if it,s not above the celing joists then it needs more.
2007-10-08 14:32:23 · answer #3 · answered by William B 7 · 1⤊ 0⤋