If this parapet is much higher than the drain and the drain gets clogged water will build up on the roof like a swimming pool.
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Here are some new building regs drawings including mansard roof edge parapet wall box gutter verge detail pitched roof flat roof abutment threshold welted drip for external gutter pitched roof to wall junction pipe through wall joist hangers window frame window lintel window sill manholes soakaway etc.
When we stripped the old roof it was found that the front soffit was.
The customer was complaining that he had draughts inside the room below this warm roof.
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Can be felt single ply lots of types liquid fibreglass or grp.
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Additional construction details drawings as well as the small selection of new details here including parapet wall detail mansard roof edge detail and box gutter detail and the foundation wall floor and roof drawings on the contruction details page many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for.
If you didn t get it right you concentrated the stresses at roof edges and you could suck in a parapet or tear or rip a membrane at the parapet photographs 3 and 4.
Courtesy of max baker and the national research council of canada.
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To wall sloped roof no overhang ledger support.
This is a potentially very dangerous situation.
On a flat roof there is usually a small wall called a parapet at the edge of the roof.
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Exterior wall parapet rafters prep.
It may be easiest to have thin deck on your joists then firrings to fall direct to outlets no box gutter thin deck and insulation then deck to take the waterproofing.
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There is no standard covering for flat roof.
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