How To Install Flashing Under Vinyl Siding

Apply a bead of caulk to the felt and set the window in the caulk.

How to install flashing under vinyl siding.

Lay a shingle over the step flashing starting at the roof edge. If the kick out and step flashing can t tuck behind the siding screw on cap flashing to cover it then caulk along the top. Start fastening in the center of the panel and work toward the ends. When the vinyl siding rests on top of these boards a piece of flashing is needed to create a leak proof conversion between the first piece of vinyl siding and the horizontal fascia board.

However in most instances step flashing should be installed behind siding. Install the trim just under the drip cap. Unless already installed a water resistive barrier should be applied to the house prior to installing vinyl siding. Install undersill trim along the edge of the vinyl over the flashing at the top and bottom.

In certain instances flashing may need to be installed on the exterior of siding. Next slide drip flashing behind the vinyl so the lip fits over the top of the ledger as shown at right. Slip in the flashing. Lift the bottom shingle and slip in the kickout flashing.

Install flashing before starting to apply the siding. Use an old rag to remove any dirt or debris that may be there. You have to think about how roof shingles or feathers on a duck work to get a good understanding. Nail j channel along both sides of the cutout.

Consult your local. Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips. Start fastening vertical siding and corner posts in the top of the uppermost slots to hold them in position. It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.

Nail it to the sidewall or glue it if nailing isn t possible. Here s why the metal flashing is so important in your case. At the top tuck metal drip cap flashing under the siding and on top of the second layer of wrap. Cover with cap flashing.

Cut a piece. Cut the drip cap to the correct size for your window. Fasten that shingle with two galvanized nails at the. Then tack the ledger into place with 16d nails.

A flat level wall surface is necessary for proper installation of vinyl siding. Refer to important notes for more information on water resistive barriers. Place all other fasteners in the center of the slots. Attach the flashing tape above the window and then slip the drip cap into the siding and attach to the tape.

Center the fasteners in the slots to allow for expansion and contraction.