Roofing Material Specifications and Details - BITEC, Bitumen ...
Roofing Material Specifications and Details - BITEC, Bitumen ...
Roofing Material Specifications and Details - BITEC, Bitumen ...
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20. Skylight, Hatch <strong>and</strong> Smoke Vent Curbs<br />
Double dome skylight<br />
shown<br />
Wood curb, 2"x10" min.<br />
(factory curbs optional)<br />
Cant strip,<br />
set in bitumen or nailed<br />
Wood blocking secured to<br />
deck with appropriate<br />
fasteners, match<br />
the insulation thickness<br />
2" wood nailer<br />
,<br />
,,<br />
,<br />
,,<br />
,,<br />
4" min.<br />
,,<br />
21. Roof Top Air H<strong>and</strong>ling Units<br />
Metal frame, 16 gauge min.<br />
Curb insulation<br />
Cant strip set in bitumen<br />
or nailed<br />
Wood blocking<br />
fastened to deck,<br />
match insulation thickness<br />
Alternate frame support<br />
for heavy units.<br />
,,<br />
, ,,<br />
, ,, ,<br />
4" min.<br />
Extruded aluminum frame<br />
with weep holes<br />
Metal counterflashing<br />
to accommodate specific<br />
curb situation, with<br />
fasteners 8" o.c.<br />
Skylight anchors as specified<br />
Fasteners approx. 8" o.c.<br />
at base flashing<br />
Modified bitumen base<br />
flashing with 8" minimin<br />
height above roof surface<br />
Modified bitumen or asphalt<br />
bleed out at edge<br />
<strong>BITEC</strong> modified bitumen<br />
membrane with optional<br />
coating or surfacing. Extend<br />
4" min. above cant<br />
Base sheet or modified<br />
bitumen base as required,<br />
extend 2" min. above cant<br />
Roof insulation<br />
Seal strip or sealant<br />
Counterflashing fastened<br />
approx. 18" o.c. with a<br />
minimum of 3 per side<br />
<strong>BITEC</strong> modified bitumen base<br />
flashing with 8" min. height<br />
above roof surface<br />
Fasteners approx. 8" o.c.<br />
with a minimum of<br />
2 each side<br />
<strong>BITEC</strong> modified bitumen field<br />
membrane with optional<br />
coating or surfacing. 8" min.<br />
height above roof surface.<br />
Base sheet or modified<br />
bitumen base as required,<br />
extend 2" min. above cant<br />
,, Roof insulation<br />
47<br />
Rounded<br />
corners<br />
Modified bitumen<br />
or asphalt bleed<br />
out at edges<br />
C O N S T R U C T I O N D E T A I L S
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