Flashing Under Aluminum Siding

Building wall or siding flashing details at horizontal surfaces.

Flashing under aluminum siding.

Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing. In areas where snow may build up add a wide band of peel and stick membrane over the step flashing but under the sheathing wrap as shown. For more on extruded aluminum flashing options go to http. Slip flashing under siding.

It is used to protect the horizontal joints between sheets of siding from water infiltration. This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted. Wall or siding connection to foundation top porch floors slabs. A common problem with cement board siding products and some other types of horizontal lap siding is that older installation guidelines called for caulking the joint instead of flashing the joint.

Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems. This flashing is typically field fabricated from a sheet of 26 ga. How to install step flashing under siding. Galvanized steel z flashing is made from 28 gauge galvanized galvanized steel z flashing is made from 28 gauge galvanized steel.

J channel will also work over the bottom cut using 11 gauge aluminum nails. This is messier than acrylic latex but effective. Bent into an l shape. Then slip flashing behind the siding covering the top edge of the ledger.

It s a tight fit to drive the nails into the undersill but you can gently pull back the. Snap a chalk line cut out the siding and tack up the ledger board. Flashing materials choices installation details specifications. Galvanized sheet metal bent at a 90 degree angle i e.

And like other flashing metal coil comes in most popular siding and soffit colors for easy matching and a professionally finished look. Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk. If the shingle already has flashing on it the kickout flashing has to slip beneath it and you ll have to loosen or remove siding to do this. Step flashing is used to provide a water tight connection where roofing adjoins a vertical juncture.

The large leg of the metal goes against the wall leaving the seat and face covering the top edge of the siding. The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding. Step 7 seal larger gaps up to 1 2 inch wide with polyurethane caulk. Step flashing is used where a roof meets a.

If the sidewall is stucco or solid wood like ours and you can t open it to get flashing behind it continue the step flashing to the peak of the roof then cover the step flashing with cap flashing. Simply apply this inexpensive filler into the cracks to seal.