Frequently Asked Questions
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Will a metal roof corrode easily?
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Is a metal roof noisy?
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Can you walk on a metal roof?
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Is a metal roof hotter?
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Why are metal roofs safer in an
earthquake?
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Why is wind resistance so important?
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How long will a metal roof last?
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Are stone-coated steel roofs better than
other types of roofs?
Will a metal
roof corrode easily?
Metal tiles
have great resistance to corrosion when contacted by water or moist air due to
the protection offered by multiple layers of tough impermeable coatings that
are applied to the metal tile surfaces during manufacture. For example, as
shown in the adjoining figure, eight different coatings are applied to Metro
Tile. Metro is so confident of the durability of their metal tile products that
they offer a 50-year fully transferable limited warranty to homeowners.
Clear
Acrylic Overglaze
Stone Coating
Acrylic
Polymer
Special Steel
Primer
Zincalume
Steel
Zincalume
Special Steel
Primer
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Is a metal
roof noisy?
No. Actually
there's more than one homeowner who says their new metal roof is actually
quieter. You won't hear any extra pitters patter on a rainy day.
Can you walk
on a metal roof?
If you walk in
the recommended areas you can. If you have an area of roof you feel will be
heavily traveled, request that your contractor install support panels in these
areas. The support panels will allow you or tradesmen to paint around a second
story or to clean windows without denting the roof.
Is a metal
roof hotter?
Actually a
metal roof deflects much of the sun's heat, which a standard composition roof
absorbs. So, you could see a noticeable reduction in your energy bills.
Temperatures in the attic can be 30 to 40 degrees cooler.
Why are metal
roofs safer in an earthquake?
They're much
lighter. Most steel roofing tile is about 1/8 the weight of a concrete or clay
tile installation. So, during a temblor, there's far less load on the
structure, reducing the likelihood of structural damage and personal
injury.
Also, a metal
roof actually adds strength to your structure. It provides twice the shear
strength of 1/2 CDX plywood.
Why is wind
resistance so important?
Even if you
don't live in tornado or hurricane country, standing up to wind is very
important. High velocity winds caused by firestorms can blow burning embers.
High winds will cause most roofing to blow off or in the case of concrete or
clay tile to raise in the front allowing the embers to blow under the roof.
Steel tiles are secured with four penny nails in the front and no flying embers
can pass under a steel tile roof.
How long will
a metal roof last?
It could
easily outlast your home - 50 to 75 years is not an unrealistic
estimate.
Are stone-coated steel roofs better than other types of
roofs?
In our view,
stone-coated metal roofing is superior to other alternatives in appearance,
durability, safety and cost as summarized in the table below:
| CRITERION
|
Stone-
Coated
Steel |
Concrete/
Clay Tile |
Wood
Shake |
Fiberglass/
Composition |
Fiber/
Cement |
| Appearance
(discoloring,
cracking, curling) |
Excellent |
Good |
Poor |
Poor |
Good |
Longevity
(disattaching,
cracking, discoloring) |
Excellent
(50+ yrs) |
Good |
Poor |
Poor |
Good |
| Weight
(earthquake loads,
wall loads) |
Lightest
(<1.5 lbs/sqft) |
Heaviest |
Better |
Better |
Good |
| Fire
Resistance |
Excellent |
Good |
Bad |
Good |
Good |
| Strength
(disattaching,
cracking, load bearing) |
Excellent |
Brittle |
Poor |
Good |
Brittle |
| Attachment
(wind,
earthquake) |
Excellent
(interlocking) |
Fair |
Poor |
Good |
Fair |
| Insulation
(heat transfer, energy
saving) |
Excellent |
Poor |
Poor |
Poor |
Poor |
| Resale
Value |
Excellent |
Good |
Fair |
Fair |
Fair |
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