What Does A Roof Jack Look Like

If it does follow our first installation procedure.

What does a roof jack look like.

Ideally locate a rafter below the sheathing. Nail the new shingles down with roofing nails so the nails are covered by the shingle above. A roof jack will not do you any good without planks of lumber to span them. What causes a sagging roof line.

You can usually feel sheathing nails which are driven into rafters through the underlayment attach a jack by driving two 16d nails never roofing nails into a rafter. Roof lines should be arrow straight. Cut roof shingles to fit around the roof jack and insert them under the existing shingles. If it doesn t have a corner and simply looks like the image below follow the second installation procedure.

Avoid using short pieces as the risk of a length of lumber tipping upward if you should happen to step onto the end of it is greatly increased. If you can see a dip curve or swag on the peak when standing in the street your roof has a problem. Use a hammer to bend the top edge of the soft lead roof jack down into the vent pipe. Standard 2 by 10 inch lumber with fit into the channel on most roof jacks and should be available at any lumber yard.