Installing Metal Shingles Over An Existing 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.

Installing metal shingles over an existing roof.

The first way is to run new underlayment over the existing shingle roof completely covering the old roof. Installing the metal roofing over 1x4 s allows the ability to also install additional insulation under the metal roof. Install the metal edging. However you ll want to check with your local building department before you make any decisions.

Use 1 1 4 inch. Getting an accurate measurement will help you determine the. This provides a couple of benefits. Can i install a new metal roof over shingles.

Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. How to install a metal roof over shingles. Install your metal edging around the perimeter of your roof. Make a slat board base on top of the shingles.

Start putting the metal panels. Another added benefit is that the layers of your old roof will further insulate your home. Your goal with the roofing felt is to make sure everything is as. You must put in a completely new underlayment over the existing shingles before you carry out any installation.

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. 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. Get a precise measurement of your roof surface. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

Step by step guide step 1. How to install a metal roof over existing shingles start with an underlayment over the existing shingles. There are really two ways to install a metal roof over a shingle roof. This will help prevent water leakage and provide a buffer between the metal roof and the existing shingles.

Lay down roofing felt over the entire roof. If you want to install steel over asphalt your best choice for installing metal roofing is to use a steel shingle system like the one shown instead of the more common and more expensive standing seam steel. The low weight of metal roofing is one thing that encourages this. It provides a solid flat surface to attach the new metal roof to it creates an air gap between the back of the metal and the shingle roof which allows for airflow.

In a standing seam roof long single panels run vertically all the way from the eave to the ridge. Yes you can install a metal roof over shingles.