Installing Z Flashing On Siding

When reading the installation details for hardie siding lp smart lap and tru wood sidings the z flashing is always shown with at least a 5 degree angle away from the building.

Installing z flashing on siding.

Make a downward cut in each of the corners and then fold the tape over the wrb. Although commonly called z flashing the z has squared corners and it could as easily have been named stair step flashing we see it most often used at the horizontal joint between two sheets of plywood exterior siding to provide protection from water seeping in at the opening. Scrape loose paint off the rotted area with a putty knife and use 80 grit sandpaper to smooth the rough surface if. Galvanized z flashing so called because of its z shaped profile keeps water from getting through horizontal joints between sheets of plywood siding.

Snap a chalk line cut out the siding and tack up the ledger board. How to install z flashing on rotted t1 11 siding 1. If only the surface is damaged. First tape the bottom of the frame and then up the sides.

You set flashing upon top edge of each piece of plywood over a fat bead of caulk and hold it in place with just heads of roofing nails driven into sheathing. Start by making an outline on the siding where you want to position the ledger board. This is to facilitate water flow. Apply a bead of caulk to the felt and set the window in the caulk.

Next comes another layer of building wrap installed like the first layer. Then slip flashing behind the siding covering the top edge of the ledger. Out from the fascia when gutters are present as required by irc code min 4 in. Do not caulk extend shingles at least 1 in.

The instructions also call for at least a 1 4 gap between the materials at the site of the z flash. Complete the installation of the first horizontal row of t1 11 siding following standard construction practices. Begin at either end of the wall and set the level middle. Do not caulk clearance and flashing requirements hardiepanel vertical siding hs1237 p2 3 09 19 figure 10 sheltered areas figure 11 mortar masonry min.

How to install z flashing on t1 11 siding. Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides. Install the first length of z flashing. At the top tuck metal drip cap flashing under the siding and on top of the second layer of wrap.

Install the trim just under the drip cap.