Question: Is It OK To Put A Metal Roof Over Existing Shingles?

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 cedar shakes?

A: If you are selecting to install a screw-on metal roof — a less expensive metal roof than standing seam, but not as good overall — you may be able to apply it over the existing cedar shakes if the planes they form are regular. … Cedar shakes vary so much in thickness that this may not be possible.

How do you stop condensation on a metal roof?

Traditionally, condensation is managed by insulating the metal roof so that the panel temperature never reaches the dew point. This is often accomplished using vinyl-backed fiberglass insulation to prevent humid air from coming into contact with the cooler metal roof (which may be at or below the dew point).

Does a metal roof affect cell phone signal?

A metal roof is just one of many building materials that may weaken cell phone reception. Generally, if you do have poor cell phone service in your home, it will be due to the cumulative effect of the materials used. … So, metal roofs don’t actually interrupt cell phone reception.

What is the best color for a metal roof?

Energy Efficiency Such a roof can be reasonably expected to be some 50 to 60 degrees cooler than a dark color asphalt shingles roof. It is best to choose a light color metal such as white, light bronze, beige, peach, light green or blue, if you live in a region that has a lot of sun and a hotter climate.

How do you put 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 are the disadvantages of a metal roof?

Disadvantages of metal roofsAffordability. Metal roofs can be as much as two or three times more expensive than other roofing materials. … Noisiness. Metal roofs can be noisy, especially during a heavy rain or hailstorm. … Expansion and contraction. … Inconsistency of color match. … Performance.

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.

How much does a new metal roof cost for a 1500 square foot house?

It will cost around $9 to $12 per sq. foot installed for a standing seam metal roof. For example, if you have 1,500 square feet, the average cost of installation is $8 per square foot – it will cost you $12,000 to install the metal roof. There are low-end shingles that can be installed on top of the old roof.

What does it cost to install a metal roof?

Cost Difference Between Metal Roof versus Asphalt ShinglesMaterialCost per SquareStone-coated steel$200 to $Standing seam$400 to $700Copper or zinc roofing$700 to $900Tin$350 to $1,5002 more rows

Should plywood go under metal roof?

As long as the interior of your roof is protected from moisture accumulation, underlayment is not required, though homeowners planning to insulate their house heavily may choose to install plywood to protect their investment. …

What is the best gauge for a metal roof?

The company indicates that 29-gauge metal is the thinnest metal that’s recommended for use on homes. Neither 29- nor 26-gauge metals may be the best option if you live in an area that’s prone to high winds and severe weather conditions. In such areas, the company recommends using thicker, 24-gauge metal roofing.

What is the best metal roof for a house?

5 Types of Metal RoofingCopper – Extremely long-lasting, very soft with low melting temperature.Aluminum – Long-lasting, resistant to salt water corrosion.Zinc – Extremely long-lasting, resistant to corrosion and lowest melting point.Steel – Three variations: galvanized, galvalume, and weathering steel (corten)More items…•