Reputable flat roofing manufacturers should have appropriate detail drawings for most penetration requirements.
Flat roof upstand detail.
Nhbc accessible threshold built up roofing bur detail.
Which would include abutments rooflights.
Flat roofing flat roofs commercial buildings flat roofs industrial buildings flat roofs residential buildings add flat roof upstand best practice.
Darren collins 4th september 2017.
All our roof lanterns shown on this website are designed to be fixed onto a kerb like detail which rises proud of the supporting flat roof assembly precisely at the open edge of the lantern aperture.
They often arise because the roof is considered too late in the process when decisions about the rest of the design cannot be changed or are already built.
The roof lantern upstand in detail.
Iko sig design technology click to enlarge at a door threshold nhbc has agreed that locally a 75mm upstand height is acceptable but either side must step up and drainage must fall away from the pinch point.
If you are adding a skylight to a flat roof you must decide on whether to construct your own upstand or purchase one from your rooflight supplier.
The job of an upstand sometimes referred to as a kerb is to lift the glass element of your rooflight off of the roof s surface and is required by building regulations for safety and weathering.
The roof lantern upstand in detail.
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Iko sig design technology click to enlarge at a door threshold the standard acknowledges that locally a 75mm upstand height is acceptable but either side must step up and drainage must fall away from the pinch point.
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Most flat roof upstand problems arise from restrictions in height such as planning restrictions which cannot be avoided.
Single ply roof types cold flat roofs warm flat roofs.
This will ensure that british standards and codes of practice are properly maintained including minimum 150mm upstands and mechanical restraints at waterproofing termination points.
Technical resources for your flat roof project.
Bs 6229 2003 flat roofs with continuously supported coverings code of practice and bs 8217 2005 reinforced bitumen membranes for roofing code of practice both state that if unwanted water ingress into the building is to be avoided all weatherproofing upstands occurring around the roof area.