Advanced Course Hardware Retail Study Guide (ACE) by National Retail Hardware Association Staff

By National Retail Hardware Association Staff

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It settles over the years, so customers who once had well-insulated homes may need more insulation. Each bag of loose insulation is labeled according to federal specifications for both mineral wool and cellulose. The column on the left of the label lists the R number. The next column tells how many bags are needed to cover 1,000 square feet of attic floor area. The third column gives the minimum thickness after completing the job. Some manufacturers will have two columns on thickness for loose-fill and cellulose insulation.

10”-11” . . . . 8” . . . . . . 2” R-38 . . . . . . 12”-13” . . . . . 10-1/2” . . . . 17”-18” . . . 13”-14” . . . 10”-11” . . . . . . is a good rental item. Loose-fill can be spread with a rake or board. It settles over the years, so customers who once had well-insulated homes may need more insulation. Each bag of loose insulation is labeled according to federal specifications for both mineral wool and cellulose. The column on the left of the label lists the R number.

Of attic floor space and it must be "balanced" or split between high and low vent. The low vent acts as a fresh air intake and the high acts as a moist or hot air outlet. If a vapor barrier is present, then the requirement goes to 1 sq. ft. for every 300 sq. ft. of attic floor space and it must also be balanced. Every shingle manufacturer now requires adequate ventilation, otherwise their warranty may be voided. 9 Ridge vents serve to vent exhaust from the attic. Typical widths are 9" and 12". Ridge vents prolong the life of the roof, keep the attic dry and cool, reduce air conditioning costs and help prevent ice dams.

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