Flashing tape seals the seams of doors and windows. It is used to prevent any damage caused by moisture. This strong and durable tape can be used on most materials.
Step 1 - Move the House Wrap Out of the Way
Use your utility knife to cut the house wrap under the siding. Pull your knife at a forty-five degree angle along the top of the window or door ledge. Fold back the flap and tape it so it stays out your way while you install the flashing tape.
Step 2 - Cut the Flashing Tape
Use a tape measure to determine the length of the sides of the window or door. Add an extra amount to account for the sill pan and an extra two inches to be able to apply the tape beyond the top of the opening. Use your tape measure to determine the length across the top. Add an additional amount to ensure the tape overlaps the side flashing. Use your utility knife to cut the flashing tape the length you have calculated for the sides and header of the window or door.
Step 3 - Install the Flashing Tape
Install the side flashing tape, beginning at the top and slowly work downward. Carefully pull the backing from the tape and press it into the side of the window or door. Smooth out the tape as you work. Be sure the tape overlaps the lining of the sill pan. Install the header flashing tape, ensuring the material overlaps the side flashing tape. Carefully pull the backing from the tape and press it into the header of the window or door. Smooth out the tape as you work. Remove the tape from the house wrap and secure it over the flashing.