Flat Roof Flashing Height

Typically 10 by 8 inch 253 mm x 203 mm flashing is chosen.

Flat roof flashing height.

L shaped flashing is a versatile general use flashing used where a uniform or strengthened finish is needed on a 90 surface. Typical methods include banding pitch pockets and cover flashings. Minimum of 12 to top of parapet. Do not lap tpo over top of parapet unless required by unique construction conditions.

For example 3 tab shingles usually have a 5 5 8 inch 143 mm exposure. Which would include abutments rooflights and service vents etc must have a minimum height of 150mm. Further your step flashing pieces need to be 10 inches 254 mm long and at least 2 inches 50 mm wider than the exposure of the shingle you re using. Top of parapet below cap to be sealed with fluid applied flashing.

Venting in wood framed parapets. Provide venting to each wall cavity. Height of roofing at wall. The 8 inch height prevents water from pouring over the top of the flashings into the building or system.

What typical detailing methods are used to seal flat roof penetrations. The gibraltar building products l flashing protects your home the gibraltar building products l flashing protects your home from moisture infiltration where your wall meets your roof. This dimension should be measured from the finished surface of the roof which would. Vertical flashings must be a minimum of 8 inches above the completed roof surface.

This height has become the industry standard and is recognized by most membrane manufacturers.