Frost Brochure Issue 03 - Catalog - Page 79
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Inverted Roof Assemblies - Domed Gratings
Rain water outlets with domed gratings
are suited to inverted roof construction
where the waterproof membrane is
located above the roof deck but below
the insulation layer (diagram page 65).
The stainless steel gravel guard prevents
ballast entering the drainage system
during maintenance. Gravel guards
higher than 150mm are available. (see
page 84). Body and clamp: Cast iron.
Dome: Polycarbonate. Area drained:
Based on a head of 35mm and rainfall
intensity of 75mm per hour. For details
of accessories 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)
33.0304
£121.20
BSP 4
240
205
79