Install Metal Roof On Shingles

Installing a metal roof over shingles can also result in an increased chance of trapped water vapor and moisture between the new roof and old roof resulting in new mold and rot.

Install metal roof on shingles.

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof. Make sure that the screws are all aligned evenly as you will be able to see them from the ground if they are. However you ll want to check with your local building department before you make any decisions. Use your neoprene washer head screws to secure the metal to the sheathing.

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. Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh. Whether you should have your old shingles removed first before having a new one installed.

A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. For exposed fasteners avoid over tightening the fastener. Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps. The vast majority of installations of the metal roofing systems produced by my company are over existing shingles.

The low weight of metal roofing is one thing that encourages this. Our answer simply depends on what kind of roofing you currently have installed but we usually install metal roofs over existing shingles. Most metal shingles will be attached to the roof using metal shingle. By removing the old roof before the new roof s installation you are able to give the underlayment a thorough inspection to ensure there are no damages that could.

Space the screws about 12 in 30 cm apart. A benefit to doing it this way is that you can see if there is any rotten plywood that needs to be replaced before installing the new roof. 1 remove the shingles before installing the metal roof the first way to install a metal roof over shingles is by completely removing the old shingles before installing the new metal roof. In a standing seam roof long single panels run vertically all the way from the eave to the ridge.

Otherwise you will need to remove the shingles.