Installing Metal Shingles Over An Existing Roof

Step by step guide step 1.

Installing metal shingles over an existing roof.

Use 1 1 4 inch. Install the metal edging. Can i install a new metal roof over shingles. Get a precise measurement of your roof surface.

Lay down roofing felt over the entire roof. You must put in a completely new underlayment over the existing shingles before you carry out any installation. This provides a couple of benefits. Another added benefit is that the layers of your old roof will further insulate your home.

The first way is to run new underlayment over the existing shingle roof completely covering the old roof. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles. Getting an accurate measurement will help you determine the. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh.

You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof. Install your metal edging around the perimeter of your roof. Make a slat board base on top of the shingles. The primary method for installing a metal roof over asphalt is to fasten a synthetic underlayment atop the existing shingles and then lay the metal roof over that.

The first one being that the new underlayment will act as a second line of defense in case water would to somehow get underneath the metal roof. Building officials in some areas will only allow a re roof over one layer of shingles while officials in other places may allow you to place the roof over two layers of shingles. There are really two ways to install a metal roof over a shingle roof. Yes you can install a metal roof over shingles.

Start putting the metal panels. How to install a metal roof over existing shingles start with an underlayment over the existing shingles. Yes you can and by doing so you save in the labor and hassle of tearing off the old roof and you won t be contributing to filling our landfills. In a standing seam roof long single panels run vertically all the way from the eave to the ridge.

How to install a metal roof over shingles. Your goal with the roofing felt is to make sure everything is as. This will help prevent water leakage and provide a buffer between the metal roof and the existing shingles. This synthetic underlayment acts as a vapor barrier and a slip sheet the slip sheet allows the metal roofing to expand and contract without damaging the finish coating on the.

However you ll want to check with your local building department before you make any decisions. The low weight of metal roofing is one thing that encourages this.