How To Attach Metal Roof Flashing

The edging or eave flashing consists of metal strips that are used to cover the perimeter of the roof.

How to attach metal roof flashing. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak. Once even a small section of roofing cement fails you ll have a leak. But it doesn t work that way. Drip edge metal valley flashing dormer chimney and kick out flashing shed water away from the connections between roofs walls chimneys and other building assemblies this collection of 18 articles animations and videos identifies the critical roof flashing areas illustrates durable roof flashing details and shows how to flash roofs.

Open valleys have metal flashing to protect this critical area of the roof. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. With the end wall flashing in place i use stitch screws to attach it to the z trim and to the gable trim. Most flashing is 8 inches wide.

Use 1 1 4 inch nails to cover the outline of the roof with strips of metal eave flashing also called edging. The metal flashing must overlap the material not the other way around. You can see what a nice clean look it provides. Place corner pieces where panels will meet bends at the edge of the roofing.

We have a one inch bend down on either gable and we can fasten this using stitch screws. If there are gutters installed on the eaves the eave flashing should be installed to overhang the lip of the gutter by about 1 2 inch. Apply a thin bead of silicone around the opening of the vent pipe area and lay the membrane in place. Continuous flashing against a sidewall is one way to install a roof but it s not the correct way.

Then nail the new l shaped flashing under the builder s felt but above the fascia board. I m going to install one between each panel directly in the center. Next place your vent flashing on top of the membrane. Cut some membrane material to seal between the vent flashing and the roof and cut an opening for the vent.

It may seem as if a single piece of flashing would offer more protection than many pieces of step flashing. 4 inches should go up the house wall and 4 inches should go on top of the porch roof shingles. Insert a neoprene screw every 12 inches along the top flat edge of the endwall flashing into the purlin beneath. Use your 1 1 4 in 3 2 cm nails to secure the flashing to the subroof.

You can also use pop rivets. On a tin roof the uppermost purlin lies just beneath the top edge of the metal. Use the metal break tool to bend the flashing lengthwise in the middle according to the angle of the roof joint.