How To Flash Trim Siding

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.

How to flash trim siding.

Start by making an outline on the siding where you want to position the ledger board. Here are four ways to use metal flashing to prolong the life of siding. Then slip flashing behind the siding covering the top edge of the ledger. Make the outline large enough to include space for the deck boards on top the ledger and any trim boards on the sides.

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. Many times builders fail to use proper flashing at the top of windows. Install the first length of z flashing. Here s an example of proper installation of dormer trim siding and flashing installed by crown builders siding and windows inc.

In this case we ve gone against new construction. 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 joints now have separated and i can see a white paper below. Nail it to the sidewall or glue it if nailing isn t possible.

Normally this wall would have a house wrap on it like tyvek. There you have a z trim and an end wall flashing that have been joined using a stitch screw. 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. I can t find any information on the web as to what this would mean.

Snap a chalk line cut out the siding and tack up the ledger board. Inspect the sidewall around and underneath the fascia and inside the house for signs of moisture damage and repair any rotted areas. When it comes to flashing siding corners many builders simply use a 1x wood corner. Inside corner w flashing.

The contract says field flash all siding joints and trim joints using mechanical slip sheeting for water intrusion prevention.