PVC / Vinyl coated steel roof OPINIONS needed

Posted by on April 12, 2006, 11:45 am

Hi folks, we got our quotes for steel roof and need your opinion.

The company is Hy-Grade and will instal a wooden grid (sort of like
furring) on top of existing ashphalt shingles, and on the grid will put
the steel shakes. These are PVC coated and shaped in a way that helps
combat metal expansion due to changing temperatures. The metal roof
will be about 3" over the existing roof wich allows for air circulation
(see image: http://www.hygraderoofing.com/images/pic_6.jpg ) Apparently
leaving old shingles has 3 main advantages:

Sound proofing - Heat control - Moisture control.

The rep assures us that air ciculating between the old and new roof
prevents condensation on the inside of the metal shakes. But... The
company's 10-point disclaimer devotes 2 points to inform customers that
Hy-Grade will not be responsible for damage caused by moisture due to
heat loss causing ice dams or condesation and that they will not be
responsible for the growth and spread of mould.

I'm wandering if you have any opinions on metal roofing in general and
the mentioned disclaimer points in particular.

I will add that the cost of the roofing is 9,000 for Steel vs 4,500
for regular shingles canadian (8,200 vs 3,900 USD), so quite attractive
to us given the 50 year warranty.

Thanks!

Posted by z on April 12, 2006, 1:25 pm

I've mulled over steel or aluminum roofing a little bit; I wonder
whether or not a rainstorm would sound, well, like a rainstorm on a tin
roof. (I've got a cathedral ceiling under it with no attic, which would
probably help a lot)

newroofwanted@yahoo.com wrote:

> Hi folks, we got our quotes for steel roof and need your opinion.
> The company is Hy-Grade and will instal a wooden grid (sort of like
> furring) on top of existing ashphalt shingles, and on the grid will put
> the steel shakes. These are PVC coated and shaped in a way that helps
> combat metal expansion due to changing temperatures. The metal roof
> will be about 3" over the existing roof wich allows for air circulation
> (see image: http://www.hygraderoofing.com/images/pic_6.jpg ) Apparently
> leaving old shingles has 3 main advantages:
> Sound proofing - Heat control - Moisture control.
> The rep assures us that air ciculating between the old and new roof
> prevents condensation on the inside of the metal shakes. But... The
> company's 10-point disclaimer devotes 2 points to inform customers that
> Hy-Grade will not be responsible for damage caused by moisture due to
> heat loss causing ice dams or condesation and that they will not be
> responsible for the growth and spread of mould.
> I'm wandering if you have any opinions on metal roofing in general and
> the mentioned disclaimer points in particular.
> I will add that the cost of the roofing is 9,000 for Steel vs 4,500
> for regular shingles canadian (8,200 vs 3,900 USD), so quite attractive
> to us given the 50 year warranty.
>
> Thanks!

Posted by Rich256 on April 12, 2006, 1:54 pm

newroofwanted@yahoo.com wrote:

> Hi folks, we got our quotes for steel roof and need your opinion.
>
> The company is Hy-Grade and will instal a wooden grid (sort of like
> furring) on top of existing ashphalt shingles, and on the grid will put
> the steel shakes. These are PVC coated and shaped in a way that helps
> combat metal expansion due to changing temperatures. The metal roof
> will be about 3" over the existing roof wich allows for air circulation
> (see image: http://www.hygraderoofing.com/images/pic_6.jpg ) Apparently
> leaving old shingles has 3 main advantages:
>
> Sound proofing - Heat control - Moisture control.
>
> The rep assures us that air ciculating between the old and new roof
> prevents condensation on the inside of the metal shakes. But... The
> company's 10-point disclaimer devotes 2 points to inform customers that
> Hy-Grade will not be responsible for damage caused by moisture due to
> heat loss causing ice dams or condesation and that they will not be
> responsible for the growth and spread of mould.
>
> I'm wandering if you have any opinions on metal roofing in general and
> the mentioned disclaimer points in particular.
>
> I will add that the cost of the roofing is 9,000 for Steel vs 4,500
> for regular shingles canadian (8,200 vs 3,900 USD), so quite attractive
> to us given the 50 year warranty.
>
> Thanks!
>

I did the same thing but the grid is on top of heavy shake. Works fine.

I put on the Gerard Roof:

http://www.gerardusa.com

Cyprus color:

http://www.gerardusa.com/products/gerardtile.htm

I have the tile style. Only problem is that if you don't step on the
wood grid when walking on it you will cause it to dent. They are easy
to remove by just removing a nail or two and using a nail bar to pop it
back out. However, I see they now have a foam underlay that can be used
in areas where you walk.

Being in a frequent hail area I got a 27% discount on my home owners
insurance.

I put it on six years ago. Looks as good as the day it was installed.

Can't comment on mold or moisture as I live in Denver, Colorado area.
(semi-desert).

Posted by jdk on April 14, 2006, 9:31 am

Rich256 wrote:

> newroofwanted@yahoo.com wrote:
>

>> Hi folks, we got our quotes for steel roof and need your opinion.
>> The company is Hy-Grade and will instal a wooden grid (sort of like
>> furring) on top of existing ashphalt shingles, and on the grid will put
>> the steel shakes. These are PVC coated and shaped in a way that helps
>> combat metal expansion due to changing temperatures. The metal roof
>> will be about 3" over the existing roof wich allows for air circulation
>> (see image: http://www.hygraderoofing.com/images/pic_6.jpg ) Apparently
>> leaving old shingles has 3 main advantages:
>> Sound proofing - Heat control - Moisture control.
>> The rep assures us that air ciculating between the old and new roof
>> prevents condensation on the inside of the metal shakes. But... The
>> company's 10-point disclaimer devotes 2 points to inform customers that
>> Hy-Grade will not be responsible for damage caused by moisture due to
>> heat loss causing ice dams or condesation and that they will not be
>> responsible for the growth and spread of mould.
>> I'm wandering if you have any opinions on metal roofing in general and
>> the mentioned disclaimer points in particular.
>> I will add that the cost of the roofing is 9,000 for Steel vs 4,500
>> for regular shingles canadian (8,200 vs 3,900 USD), so quite attractive
>> to us given the 50 year warranty.
>> Thanks!

>
> I did the same thing but the grid is on top of heavy shake. Works fine.
>
> I put on the Gerard Roof:
>
> http://www.gerardusa.com
>
>
>i had the gerard granite ridge put on a complete tear off. they put a

special type ice shield over the entire roof first. talked to roofer a
few weeks ago. he said the price of metal has gone up almost two fold.
i could not do it now for the price i did it a couple of years ago.

Posted by Don Young on April 12, 2006, 10:55 pm

Metal of any kind will condense water when the temperature of the metal is
below the air dew point. Don't you get dew on cars in the morning? Moisture
will definitely condense on the top and bottom sides of the roofing. The
roofing has to be installed so that the condensation does not accumulate and
cause damage. Proper ventilation, drainage, and water-proofing are required
for long satisfactory service.

I had two metal roofs installed and am well pleased with them. As with many
things, good materials and proper installation make the difference. Ask for
references, preferably older installations, and also look carefully at the
workmanship.
Don Young

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