Flashing An Existing Deck With Siding Behind It

The vertical flange of the flashing is to extend up behind the adjoining siding.

Flashing an existing deck with siding behind it.

Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides. 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. Snap a chalk line cut out the siding and tack up the ledger board. The roof deck flange of step flashings are to be fastened to the surface of each shingle in a position whereby the next course of shingles will cover up hide the flashing from view.

4 leave a gap of 1 inch or more between the the top of the ledger and the edge of the vinyl siding. When slipping the flashing under the siding be sure to slide the flashing to the left or right of the ledger by at least 2. A simple metal or plastic cap flashing is probably adequate to flash a deck ledger in a dry climate while the 3 layer system described in this video is suitable for high rainfall and damp climates. Step flashings are to be installed one per course.

Grind out the grout along a row of bricks. Slip flashing under siding. Where the back flashing needs to be cut around an obstacle measure for the notch and cut with tin snips or slice several passes with a knife. Since newer installation guidelines do not recommend caulking this joint but instead recommend leaving a small gap and flashing behind the ends of the siding i think it is more prudent to add flashings when it is possible to do so.

Insert the flashing into the mortar joint so that it fits tightly with the wedge. Then slip flashing behind the siding covering the top edge of the ledger. On the end that will fit into the mortar. The irc doesn t provide prescriptive measures for flashing other than the minimum thickness for metal flashing 0 019 in.

Though it will take some dismantling and perhaps a replacement deck board or stick of siding following the recommended practices for installed ledger flashing based on your exterior cladding is the best approach. Start by making an outline on the siding where you want to position the ledger board. Cover the top edge of the vertical leg of the flashing with waterproof tar paper or house wrap. Seal the joint with a high.

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.