Frost Brochure Issue 03 - Catalog - Page 75
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Warm Roof Assemblies - Flat Gratings
Rain water outlets with flat gratings
suited to warm roof construction where
the waterproof membrane is located
above the insulation layer on top of the
roof deck (diagram page 65).
Body and clamp: Cast iron. Grating:
Ductile iron. Area drained: Based on
a head of 35mm and rainfall intensity
of 75mm per hour. For details of
accessories please see pages 84-88.
Note 1 - smaller outlet sizes 2” & 3”
available for threaded outlets.
Frost roof drain domed grating with medium sump body and threaded outlet
See Note 1
Part Number
Outlet Size
Deck Opening
(mm)
Area Drained
(sq.m)
33.0104
£164.30
BSP 4
240
290
75