Internal Roof Drain Details

Internal roof drains properly slope the structural framing and deck minimum inch per foot. If water collects in one spot in the middle of your roof then installing an interior drain there to move the water is a good solution. Tapered insulation panels should be installed around the drain to ensure positive flow of water towards the drain.

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Internal roof drain details.

Use an insulating fill or tapered insulation for slope. Brittle tar will crack and leaks will occur. This is a drainage point that can be installed across the roof s surface even in the centre of the roof. Properly locate roof drains scuppers and gutters to remove water from the roof s surface.

Recess the drain below the roof. The roof drain should be recessed below the roof surface. Roof drains must be firmly secured to the roof with an underdeck clamp otherwise due to snow loads rain loads and reg ular expansion and contraction the drain will work in and out of the roofing causing roofing membranes to flex and fail. Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs.

This can be accomplished by setting the head of the roof drain below the insulation level and by providing a sump at the drain.

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