Property Edge Flashing Overlap For Flat Roof

Overlap pieces at least a couple of inches shingle style with pieces higher up on the roof overlapping pieces lower down.

Property edge flashing overlap for flat roof.

The lower edge is hemmed and laps the base flashing and is formed to be a snug fit against the base flashing. Step one in steep slope roofing is the edge flashing. Roof drip edge flashing serves multiple functions on a building the foremost of which is to assist water in leaving the roof edge with minimum damage to other building components by directing the water off of the roof and into the gutter. Base roof flashing works like shingles it overlaps and sheds water.

The base flashing laps the roof a minimum of 4. Non flat surfaces 2 0 0 3 0 0 flashing straight overlap sealed roof underlap soaker continuous beads of silicone continuous beads of silicone either timber or steel battens can be used indicates trough turn up. One common method is to lay the edge metal under the eaves membrane and over the rake membrane. Then reshingle sliding metal step flashing behind the fascia board the trim behind the gutter.

The base flashing is fastened to the roof with cleats spaced a maximum of 12 apart. Get a piece of the flashing to cover and line the edge up with the area and bend it around until it meets and overlaps the starting edge. Flashing is aluminum so it is very easy to bend in this fashion. It bends around the edge of the roof channeling any moisture that penetrates the shingles away from the roof decking.

If the gutter is lower than the bottom edge of the drip edge install flashing behind the drip edge and over the back edge of the gutter to remove the gap. Another way is to storm proof the edge by folding the membrane down over the gap between roof deck and fascia layering metal flashing on top sealed with another strip of flashing membrane. Roof drip edge flashing at roof eaves gable ends. Quality edge flashings are available in many sizes all of which are available in colors that match the drip edge w valley and gutter protection.

Click to enlarge any image. Metal drip edge flashing is an important element of any roofing edge. If leaks continue to occur from ice dams consider installing roof edge heating cables. This keeps the water on top of the flashing and away from the roof deck.

The layering uses gravity to direct water out of the assembly. When lapping the eave metal overlap them so the seam faces away from the direction of prevailing view. The valley flashing laid over the joint where the two roofs meet should overlap the step flashing at least 2 in. The cap flashing is set in the mortar joint between bricks.

Drip edge roof underlap roof overlap wall side underlap horizontal sheeting. If the overlap is too short fix it by placing drip edge under the first row of roof shingles and be sure that the exterior edge is reaching over the gutter.