Chapter 15 Roof Assemblies and Rooftop Structures Flashcards
If flashing was made of metal..
shall be corrosion resistant with the thickness of .019 inch or more
Crickets or saddles shall be installed on..
the ridge side of any chimney or penetration greater than 30 inches wide perpendicular to the slope
crickets or saddles shall be made of what material?
Sheet metal or same material as roof covering
Class A Roof Assemblies…
effective against severe fire test
Class B Roof Assemblies…
effective against moderate fire test
Class C Roof Assemblies…
effective against light fire test
Special wood shingle or wood shake roofing shall have an underlayment of
5/8 inch Type X water resistant gypsum board or
gypsum sheathing
Type X water resistant gypsum board or
gypsum sheathing shall be placed under minimum…
1/2 inch wood structural panel solid sheathing or
1 inch nominal spaced sheathing
where ice tends to build up an…
ice barrier is needed for asphalt shingles, metal roof shingles, etc..
ice barriers shall consist of no less than..
two layers of underlayment cemented together or
self adhering polymer modified bitumen sheet
ice barrier shall extend from the lowest edges of all roof surfaces to a point no less than…
24 inches
Asphalt shingles shall only have a slope of
17% to 33%
Fastenings for Asphalt shingles shall be made of…
Stainless steel, aluminum, or copper roofing nails
minimum 12 gage shank with a 3/8 inch diameter head
Penetration of Fastenings for Asphalt shingles
Through roofing materials and no less than 3/4 inch in roof sheathing
Asphalt shingles shall have a minimum number of fastenings by manufacturer, but no less than
4 fasteners per strip shingle
or two fasteners per individual shingle
Minimum slope for lapped, nonsoldered seam metal roof panels without lap sealant
25% slope
Minimum slope for lapped, nonsoldered seam metal roof panels with lap sealant
4% slope
Minimum slope for standing-seam metal roof panel system
2% slope
Metal roof panels shall be secured to…
The supports with manufacturer’s fasteners
Metal roof shingles minimum slope on roof slopes…
25% slope
Mineral-surfaced roll roofing minimum slope of roof slopes…
8% slope
Wood shingles minimum slope on roof slopes
25% slope
Wood shingles shall be laid with a side lap no less than…
1 1/2 inch between joints in adjacent courses
Spacing between wood shingles shall be between
1/4 to 3/8 inch
Wood shakes minimum slope…
33% slope
Wood shakes shall be used on..
solid or spaced sheathing
Built-up roofs minimum slope…
1% slope
Modified Bitumen roofing slope…
2% slope for drainage
Penthouse construction other than Type I shall not exceed
18 feet in height above the roof deck
Above Penthouse roof elevator shall not exceed
28 feet in height above the roof deck
Mechanical equipment screens shall not exceed
18 feet in height above the roof deck
