Roofing Flashcards
Reasons For Underlayment
Protects Sheathing, Weather protection, Protects shingles from wood, Insulation, Cushions heavy roofing - 35
The Unit Of Measure Of Asphalt Shingles Is A?
Square 100 sqf - 51
What cuases Ice Dams? Membrane should be how far Inside Wall Line?
Freeze and thawcycle, 24” - 61 - 63
Define Counter Flashing and Step Flashing
Built on a vertical surface and bent down over base/ where sloping roof meets verticle surface - 98
Roll Roofing Exposure
17” figure 5-9, 5-10 - 141
Built-Up Roofs Require Vapor Barriers _______ To ________ Pounds Per Square
45, 80. - 298
Reasons For Stone On Bur
Protects underlying roof, foot traffic, ballast to resist wind uplift, reduces surface temp - 307
When insulation rafters allow______ min airspace for ventilation.
1”, Figure 12-20 - 358
Most importranat reason to install vapor barrier?
Condensation - 362
The ability of a vapor barrier to resist vapor penetration is measured in?
Perms. - 363