How To Install A Metal Roof Over Existing Shillk44

Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

How to install a metal roof over existing shillk44.

This is by far the most common way to install a metal roof. 3 install 1x4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1x4 purlins over the shingle roof. Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing. Lay a metal roofing panel over the existing roof material in the bottom corner of the roof surface and fasten to the roof according to the metal panel instructions.

But first here are a few precautions about the underlying material. We re going to break them down so you know what to look out for. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. Add the metal panels.

Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Always begin working at the point with the longest peak to eave distance. Install the roofing screws vertically along each rib in the panel. The edging or eave flashing consists of metal strips that are used to cover the perimeter of the roof.

Venting the eaves to vent the roof holes are cut in the old roof above the soffit which pulls air through the soffit vents underneath. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life. As long as the plywood under the shingle roof is in good condition this way can provide many benefits. Metal roofing materials are available in several styles that require different fastening applications but are most commonly screwed to the roof framing or sheathing material which in the case of installing over existing roofing material should be fastened using 2 1 2 inch screws.

Take your first sheet of. Installation of metal roofing over shingles. This provides added protection against ice dams. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof.

The low weight of metal roofing is one thing that encourages this. If you choose to install metal roofing over shingles there are certain things you must keep in mind.