How to cut hip and ridge cap shingles for installing a ridge vent on a shingled roof.

The entire roof deck is provided with cooling by ridge vent installation.Installation has a low profile to keep the home pleasing.A metal ridge vent or shingle-over vent will be used.

Before the ridge vent installation begins, the crew installs pieces of peel-and-stick membrane to patch the felt paper on the adjacent wall.They lap the peel-and-stick, existing felt, and new housewrap over the step and kick-out flashings so that any water hitting the wall is directed onto the roof instead of behind the flashing.

To cut the opening for the ridge vent, they need to measure down 3 inches from the top.One of the roofers uses a circular saw with a blade and plunges it into the ridge at the ends to follow the chalk line.The ridge-vent manufacturer recommends that he stop the cut 6 inches short of the roof edge.They clean the area after the final cut.There is wide air space on both sides of the ridge.

The ridge vent will allow hot air to escape the attic and prevent water and insects from getting in.They put it on the ridge by tacking one end and rolling it out.They nail it along the edge.Installation of a ridge vent increases the home's energy efficiency and prolongs the life of the roof.

The ridge needs to be capped.The ridge cap on this roof comes in three feet of shingles.There are squares.Ridge caps should face away from the wind.Our first cap is against the side of the house.They apply roof cement to seal the first one.They work their way across the ridge.Each cap has 2 nails on it.The caps have an 8-in.You should consult your manufacturer's instructions for your shingle type.

They remove the top layer from the second-to-last cap at the end of the ridge.The exposed portion of the final cap is cut off by the roofer.He used 2-in. nails to nail it in place.There are roofing nails.He coats the nail heads with roofing cement.

It is time to trim the overhanging roof edges.They cut the line with a knife.

An entrance to the backyard can be seen from the unusual roof projection.The roof is done once it is shingled.

While not all homes require ridge vent installation, you or your roofer may consider adding one during a reroofing project, particularly for an older home with gable vents.Installation of ridge vent will improve energy efficiency because Gable Vents rarely act as an effective Ventilation System on their own.If you are doing the job yourself, expect to spend less than $150 for material, but ridge vent installation by a roofer will add about $400 to $500 to your roofing project.

Before watching our how-to series on re-roofing an existing building, you should get an overview of the entire process.

A pro roofing contractor shows how to keep a job site clean, remove worn-out roofing, and replace damaged board sheathing before installing a new roof.

Before the shingles go on, a pro roofing contractor shows how to install water-management details.

As these roofers lay out materials, set a course, and cut and nail down shingles, watch.

The last phase of the project includes fastening down vent material and nailing down roof-cap shingles.

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