How To Flash Siding

This has proven problematic over time as caulking the joint results in unsightly surface appearances due to the different textures as well as resulted.

How to flash siding. In certain instances flashing may need to be installed on the exterior of siding. How to install step flashing under siding 1. Start by making an outline on the siding where you want to position the ledger board. Lift the bottom shingle and slip in the kickout flashing.

Building siding flashing finish details for building corners use overlapping 1x4s or 1x6s at outside corners or use 5 4 stock for a heavier look. Use a felt paper spline wrapped around the corner and extending 6 inches beyond the corner board to protect the joints where the siding meets the corner boards see figure 1 5 at left. Many times builders fail to use proper flashing at the top of windows. When it comes to flashing siding corners many builders simply use a 1x wood corner.

Cover with cap flashing. Install the trim just under the drip cap. 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. At the top tuck metal drip cap flashing under the siding and on top of the second layer of wrap.

Here are four ways to use metal flashing to prolong the life of siding. Next comes another layer of building wrap installed like the first layer. Where a slope roof meets a sidewall slip the upper legs of the step flashing under the sheathing wrap see illustration. Cut a piece.

Then slip flashing behind the siding covering the top edge of the ledger. However in most instances step flashing should be installed behind siding. Lay a shingle over the step flashing starting at the roof edge. Inside corner w flashing.

Slip in the flashing. 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. Slice along the bend line about 4 inches into the first piece of flashing at the bottom of the roof with tin snips. All flashings must integrate with adjacent materials so water always flows to the exterior following the shingle principle.

Apply a bead of caulk to the felt and set the window in the caulk. It is always recommended to install step flashing behind stucco dryvit wood panel lap siding vinyl siding cedar shingle siding etc.