Question: How Much Should A Metal Roof Overhang?

Is it OK to put a metal roof over shingles?

Metal roofs can be installed over your existing roof without tearing off shingles, provided local building codes allow it.

Make sure to consult local building codes before having a metal roof installed directly over old shingles.

Some jurisdictions may require full tear-off whenever a new roof is installed..

What happens if lightning strikes a metal roof?

It has been observed that installing a metal roof makes building owners think more about lightning and the dangers of lightning strikes. … The short answer is, no, a metal roof will not make lightning more likely to strike, but it may make a lightning strike less dangerous if it occurs.

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).

Can you install metal roofing directly to plywood?

Metal roofing requires a solid substrate. Rotted, sagging areas in your roof’s plywood decking should be replaced prior to installing metal panels in order to prevent costly repairs in the future. Ensure that the plywood deck is strong enough to withstand the added weight of the metal panels.

Do you need drip edge on shed roof?

Water will work its way back up under the edge of your shingles, however, with drip edge properly installed on your shed roof, this damaging water will be re-routed to drop vertically to the ground or gutter instead of permeating into your roof sheeting. … Here’s the right way to install drip edge on your shed roof.

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.

Do you need a lightning rod on a metal roof?

In most situations, it is not necessary to install lightning rods on your metal roof. Lightning strikes to homes are rare. If your roof is the highest point of a surrounding area, you may consider having a lightning safety system installed on your home.

Can you walk on a metal roof?

Most metal roofs are manufactured and installed in such a way as to be safe to walk across without the worry of damaging the roof. You might mark or scuff the finish or paint on your metal roof, but average foot traffic shouldn’t significantly impact the longevity or performance of your metal roof.

Can I put metal roofing over OSB?

No, you do not need to screw into solid lumber (joists, stripping,etc.). As you can see, the thinnest material they recommend is 1/2” (7/16”) OSB board at 9” on center up to 24” on center. Be sure to follow their instructions in order to obtain the warranty. Metal roofing screws need to go into framing.

Does a metal roof lower your insurance?

That’s why having a newly installed roof can save you on insurance premiums. … Insurance companies also look favorably on metal roofing because research has shown that homes with metal roofs receive less damage from storms and house fires, which means the company is much less likely to have to pay an insurance claim.

How do you finish a roof edge?

Install roof drip edge along the eaves, add underlayment, then place drip edge along the gable end. The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge.

Does a metal roof affect WIFI?

Metal objects can cause major wireless Internet disruption, so if you have a house with a metal roof you may need to take extra steps to ensure that your wireless Internet signal is as strong as it possibly could be. You want to avoid dead signal zones in the house where you are unable to get wireless Internet at all.

Should metal roofs be grounded?

The short answer is no, you don’t have to ground a metal roof, and you will incur no additional risk if you don’t ground it in most circumstances.

Do you need felt paper under metal roofing?

The traditional and most common material used for roof underlayment on a steep-slope metal roof is non-perforated, asphalt-impregnated felt underlayment. … Depending on the demands of the architect, local building code or the metal panel manufacturer, one or two layers of non-perforated asphalt felt are used.

How far should metal roof overhang gutters?

3: The panels at the eave side of the roof should overhang into the gutters 1 to 1-1/2 inches. If installing metal on a non gutter application you can overhang the panel up to 3 inches.