How To Install Metal Roofing On Top Of Shingles

As long as the plywood under the shingle roof is in good condition this way can provide many benefits.

How to install metal roofing on top of shingles.

Before you install metal roofing repair any damage to the wood under the shingles. Metal roof over shingles condensation. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Make a slat board base on top of the shingles.

Metal roofs must be laid flat on a vapor barrier because steel will condensate if there s any air space underneath it. 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. 5install metal panels or shingles. Then cover the entire roof with a layer of insulation and secure it with a staple gun.

Experts recommend that you work diagonally and raising each row of shingles gradually. How to install a metal roof over shingles. You will need to lay some 1 by 4 inch pine boards lengthwise every two feet on your roof. It doesn t matter if the air space is a half inch or six inches because the condensation factor will remain the same.

What s involved in how to install metal roofing. This is what it looks like when you install a steel shingle roof system over an existing asphalt shingle roof. You should start your metal shingles installation with half a shingle or in accordance with your metal shingles installation manual which should be system specific starting from the left of the starter flashing or gable. Codes vary so call your local building department to know how to install metal roofing over shingles properly code wise.

Install your metal edging around the perimeter of your roof. Anatomy of a steel roof. Install the roofing screws vertically along each rib in the panel. Put the steel down directly on a vapor barrier.

I would say that in most cases less weight is being added to the home by the new metal roof than what the current shingles have lost due to granule wear and oil evaporation. 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. 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. Install the metal edging.

Next use 1 inch nails to secure some metal edging to the perimeter of the roof. Steel shingles weigh about 1 4 what asphalt shingles weigh and aluminum shingles weigh about 1 8 what standard shingles weigh.