Flashing Under Siding

Lay a shingle over the step flashing starting at the roof edge.

Flashing under siding. Cut a piece. The seat dimension 3 8 in corresponds to the siding thickness. 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. Here are four ways to use metal flashing to prolong the life of siding.

Flush the end of the flashing length with the wall corner and secure the flashing to the framing with an 8d nail at each wall stud. The best solution is a preformed or custom bent kick out flashing to divert the water away from the siding. Slip flashing under siding. The recommended length of step flashing is typically a minimum of 2 inches longer than the exposure of the roofing material.

When it comes to flashing siding corners many builders simply use a 1x wood corner. Start by making an outline on the siding where you want to position the ledger board. Fasten that shingle with two galvanized nails at the. How to flash siding butt joints after the siding is installed 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.

Flashing helps prevent any moisture which can collect due to condensation or small gaps in the siding that flows downward from infiltrating behind the house wrap where it can do damage. It is used to protect the horizontal joints between sheets of siding from water infiltration. The large leg of the metal goes against the wall leaving the seat and face covering the top edge of the siding. How to install step flashing under siding 1.

Then slip flashing behind the siding covering the top edge of the ledger. Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips. 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 photo 2. Where the step flashing terminates along a sidewall is a common trouble spot for moisture problems.

Otherwise dripping water will leave its mark along the siding. This results in a 2 inch minimum head lap. Install the first length of z flashing. Galvanized steel z flashing is made from 28 gauge galvanized steel.

Therefore the upper piece of wrap or flashing should always overlap any lower pieces. Begin at either end of the wall and set the level middle section of the z flashing onto the top edge of the siding panel with the wider flange upward and against the wall framing. Snap a chalk line cut out the siding and tack up the ledger board. 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.