Flashing Under Aluminum Siding

The solution to rotting sidewalls is a small piece of bent metal called a kickout flashing at roofing suppliers which simply directs all that water away from the wall.

Flashing under aluminum siding. Dog ears will be cut on both sides approximately inch from the bottom and then folded to create a stop that will locate itself on the top of the underlying row of siding but not be so long that it will run into the nails that hold the siding of the row being flashed. If the window already exists the self adhesive flashing will likely cover the sheathing and any window flanges only. Then slip flashing behind the siding covering the top edge of the ledger. How to install step flashing under siding 1.

Otherwise dripping water will leave its mark along the siding. The vertical flange of the flashing is to extend up behind the adjoining siding. Lay a shingle over the step flashing starting at the roof edge. Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides.

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. Paint works well over it. Fasten that shingle with two galvanized nails at the. If you are installing a new unit the self adhesive flashing 43 the home depot will cover the inside of the framing as well as the sheathing.

Start by making an outline on the siding where you want to position the ledger board. In addition to metal flashing self adhesive flashings similar to waterproof shingle underlayment wsu sheets used for roofing edges are often applied around window or door openings. Step 7 seal larger gaps up to 1 2 inch wide with polyurethane caulk. This is messier than acrylic latex but effective.

The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding. Maybe in this case the flashing extends upwards behind the building siding forming a zee shape that might reduce this risk. Simply apply this inexpensive filler into the cracks to seal. Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems.

Install the kickout flashing. Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk. Kickout flashing installs just like standard step flashing except that half of the kickout flashing hangs over the edge of the roof. Details like this risk rot and insect damage to the structure.

Cut a piece. A better way is using simple extruded aluminum inside corner w flashing that will prevent water intrusion and last as long as fiber cement siding. This results in a 2 inch minimum head lap. The metal flashing placed on wall top slopes back towards the building directing water inside the structure.

Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips.