How To Install Metal Roofs Over Existing Asphalt Shingles?

How to Install Metal Roofing Over Asphalt Roof Shingles

The use of metal roofing is on the increase in cities and towns across the country and this is largely because of its ability to withstand harsh weather conditions.  Metal roofing may be very useful to those living in areas that are prone to bad weather, and the tips below will help in installing metal roofing.

Instructions

When installing metal roofing, the first and foremost thing to remember is safety.  Wear goggles and safety gloves all the time as this will ensure that you are free from accidents.

Ensure that the area you are working on is tidy, and clean up all debris that lies around.  Have all the nails and sharp edges in sight.

One of the biggest advantages of metal roofing is that, you can install it without having to remove the old roofing underneath.  This saves you time and money.

Read the installation manual, if it has one and note that although material in metal roofing has a Class A in fire rating, this feature may diminish slightly when it is installed over an old roof.

Using TEK screws, fasten the roofing pieces as these screws can drill through the roofing material without the need of a drilling machine.  The screws come included with rubber washers which will aid in the formation of a water tight seal and prevent against any leakage.

Each and every metal roofing supplier includes a manual on how to successfully install metal roofing over roof shingles.  This manual can also be checked on the respective manufacturer’s homepage.

Before getting metal roofing, take time to do research on the different prices and styles available from different suppliers and manufacturer’s.

By learning and knowing how to install metal roofing over asphalt shingles, you will be able to upgrade your home’s roofing and maintenance with minimum cost.

Metal roofing can be installed directly on top of shingles. Metal installed directly over shingles may show the shape of the shingle through the flats of the metal, creating a problem appearance. Felt can be laid directly over the shingles and then covered with the metal. If the shingles are very flat this may hide the contour of the shingles. 30 lb. Felt will work better than 15 lb. Felt. Fan fold insulation applied directly over the shingles and under the metal will solve all but the worst shingle shape issues. If you are using a through-fastened panel the screws should be installed on top of the rib when installed over shingles.

Metal roofing can be installed directly on top of shingles. Metal installed directly over shingles may show the shape of the shingle through the flats of the metal, creating a problem appearance. Felt can be laid directly over the shingles and then covered with the metal. 30 lb. Felt will work better than 15 lb. Felt. If the shingles are very flat this may hide the contour of the shingles. Fan fold insulation applied directly over the shingles and under the metal will solve all but the worst shingle shape issues. If you are using a through-fastened panel the screws should be installed on top of the rib when installed over shingles.

Metal roofing installed over shingles.
Sub framing should always be use prior to installation of the panels themselves. Depending on the local codes, we have used 1x4 strips, 26 guage metal framing systems mechanically attached to the framing members of the present structure.
Then insulation if required, and then install the panels per the National Roof Contractors Association's latest bulletins or the manufacturer's specifications.
All of these qualify for the 1500 tax credit.