Question: Can You Put A Metal Roof Over Existing Metal Roof?

How flat Can you make a metal roof?

Low-slope roofs are not totally flat, their roof slope generally ranges from 1/4:12 to 3:12.

Minimum metal roof slope depends on the roof profile, building design, climate and site location.

Typically, large-footprint, single-story warehouses and pre-engineered metal buildings will utilize low-slope metal roof systems..

What is the best flat roof covering?

Ethylene Polypropylene Diene Monomer (EPDM) is one of the most versatile rubber roofing options on the market. Considered to be one of the best materials for flat roofs, rubber is a popular choice for industrial and commercial applications thanks to its ability to withstand extreme weather conditions.

Can you climb on a metal roof?

Metal roofing can be walked but, homeowners should refrain from doing so for safety reasons. If a contractor does need to walk your roof, they should practice sound safety procedures and follow OSHA safety requirements.

Can you put a metal roof over a flat roof?

Installing a sloped metal roof over a flat roof. When installing a new sloped metal roof over an existing flat roof the support structure is installed over the top of the flat roof. When using a standing seam sloped metal roof the new roof pitch can be as low as 1/4:12. … This new roof should last over 40 years.

Does a metal roof need furring strips?

When installing a metal roof over an existing roof, insulate the spaces between the wood strips with rigid insulation to prevent condensation before installing the roofing. You also need to add furring strips. … Twenty-four inches is a common spacing of furring strips for a metal roof.

What do you put under a metal roof?

The traditional and most common material used for roof underlayment on a steep-slope metal roof is non-perforated, asphalt-impregnated felt underlayment. There are several types of felt underlayment including both organic reinforced and inorganic reinforced.

What is the best way to install a metal roof over shingles?

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. In a standing seam roof, long, single panels run vertically all the way from the eave to the ridge.

What is the lowest pitch for a metal roof?

The minimum slope for lapped, non-soldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal (25-percent slope). The minimum slope for lapped, non-soldered seam metal roofs with applied lap sealant shall be one-half unit vertical in 12 units horizontal (4-percent slope).

Can you put a metal roof over 3 layers of shingles?

Most building codes allow you to install a metal roof over 1-2 layers of shingles, but no more. Verify codes in your area before installation.

Can you put metal roofing over old shingles?

Metal Roofing Can Be Installed Over Existing Roofs Metal roofs can be installed over your existing roof without tearing off shingles, provided local building codes allow it. While shingle removal is the preferred route, tear-off is messy and raises the cost of the job.

How do you walk on a metal roof without slipping?

Metal Roof Safety Walking Tips Wear soft, rubber-soled shoes for the best traction. Position your ladder as close to where you need to be on the roof, but away from any known weak spots. It should extend at least 3 feet above the roof edge so you have something to hold onto.