Dormer Siding Flashing

Things needed rigid foam board insulation 3 8 inch head galvanized shingle nails hammer utility knife polyethylene house wrap construction stapler house wrap tape metal flashing tin snips tape measure corner molding 8d galvanized nails primer paint or wood sealer wood siding miter saw or circular.

Dormer siding flashing.

Roof flashing is critical to keeping a house dry but people often get it wrong. Any missing or corroded flashing or flashing that has slid down the roof beneath the. Cover the connections with peel and stick membrane and then fold the synthetic underlayment up the wall also. We discuss the importance of keeping wood siding clear of the roof surface the need for flashing at the dormer side to roof intersection and the need for counter flashing at step flashing along the same roof wall intersection.

Add a hole and improper flashing from a recent roof installation to the mix and the water had an open invitation to run into the house. Lay a bead of roofing cement along the shingles just below the dormer and bed the metal base flashing into it. In this case an uninsulated dormer made it easy for moisture to seep inside. Ideally this custom flashing will have soldered corners but if not carefully notch the metal at the dormer corners and wrap the vertical leg around the corner onto the side wall.

Here s an example of proper installation of dormer trim siding and flashing installed by crown builders siding and windows inc. Underlayment and peel and stick should go higher than the step flashing for. To read pdf files you need the adobe acrobat reader 6 0 or higher. The residential dormer flashing is installed under your siding and on top of your roof at the bottom of a dormer or end wall.

It is manufactured from premium steel coil. In this article veteran remodeler mike guertin shows how to flash a dormer with bombproof details. This article describes mistakes at roof dormer sidewall flashing and roof dormer sidewall coverings that invite leaks rot and insect damage on buildings. Just as the source of a water leak can be difficult to detect the solution to solve it is usually multi faceted.

While the gold standard for roof flashing is soldered copper the fact is that for economic reasons the vast majority of roof flashing is done with aluminum.