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Posted by Al on February 14, 2005, 3:51 pm
I live in a house my parents bought in the
late 1940's. In the back is a low-slope
roof. The low-slope portion has been untouched
since at least the 1960's if not the 1950's.
This summer I had a new roof installed on the
rest of the house. The roofer told me he would
not do the low-slope part. I told him that suited
me just fine because it never gave me any trouble
and had been zero maintenance.
It turned out that he sub-contracted out the
entire job. He didn't watch "his guys" and
they roofed the entire roof including the low-
slope portion.
The manufacturer said they
would not warrant the low-slope portion because
of insufficient slope. Another roofer told me
the roof will not last.
Problem: No one knows how to put the roof
back the way it was. Everyone I have consulted
about the roof says that the technology is lost
and that any roof that is put there will have
to be coated every three years.
Have we regressed that much?
Is it impossible to construct a low-slope roof
(1.75 in 12) so that it does not need to be
maintained?
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Posted by Roger T. on February 14, 2005, 5:05 pm
Our back roof was only 1.8 inches per foot like yours, and was shingled with
comp. roofing, which failed within two years. Shingles are not applicable,
as most manufacturers will void their guarantee for shingles if pitch is
less than 4 inches - read the left over package covers on the product.....
So we had roof stripped to wood decking, then had a five layer non-shingle
commercial roof put on. You need to get better info, and keep away from the
idiots that do jobs poorly and give erroneous advice (eg the technology is
lost!) . Get local references from neighbors you know, and use local roofers
that have high volume business and good reputation, with warrantees. Our
roofer had a 3 year unconditional warrantee, but de facto much longer, as he
is known to correct mistakes way behond this period. On the steeper 4 inches
per foot front roof, we got 30 year shingles.
Anyway, the low pitched roof we had put on was first underlain by
fiberglas/rubberized padding or blanket, then three layers of lapped hot tar
mineral felt, followed by a walkable mineral grain surface, hot tarred to
the tarred 3-ply felt underneath. It should be good for 20-30 years, and has
9 years on it so far, with little signs of aging. I hate tar and gravel, as
it is hard to diagnose leaks, and is more prone to damage by walking.
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Posted by Al on February 14, 2005, 11:19 pm
Roger T. wrote:
show/hide quoted text
> Our back roof was only 1.8 inches per foot like yours, and was shingled with
> comp. roofing, which failed within two years. Shingles are not applicable,
> as most manufacturers will void their guarantee for shingles if pitch is
> less than 4 inches - read the left over package covers on the product.....
I did read it - several times. The shingles were made by Tamko.
www.tamko.com
Somewhere in there the warranty said it was good down to 2" per foot.
But, it doesn't really matter since the slope was about 1 5/8" per foot.
show/hide quoted text
> So we had roof stripped to wood decking, then had a five layer non-shingle
> commercial roof put on. You need to get better info, and keep away from the
> idiots that do jobs poorly and give erroneous advice (eg the technology is
> lost!). Get local references from neighbors you know, and use local roofers
> that have high volume business and good reputation, with warrantees. Our
> roofer had a 3 year unconditional warrantee, but de facto much longer, as he
> is known to correct mistakes way behond this period. On the steeper 4 inches
> per foot front roof, we got 30 year shingles.
> Anyway, the low pitched roof we had put on was first underlain by
> fiberglas/rubberized padding or blanket, then three layers of lapped hot tar
> mineral felt, followed by a walkable mineral grain surface, hot tarred to
> the tarred 3-ply felt underneath. It should be good for 20-30 years, and has
> 9 years on it so far, with little signs of aging. I hate tar and gravel, as
> it is hard to diagnose leaks, and is more prone to damage by walking.
Thanks for the information. Now, I know something can be done. I have
had two doses of misinformation. The second "lost technology" guy does
have an excellent reputation. However, it seems like he recently took
over the business from is father and is a bit young.
We are just getting out from under
a foot of snow right now. I don't know what actually was done to
the roof. I am hoping at least part of the original roof is still
there so I can see how it was done. If not, I can use your
information as an IQ test.
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Posted by xrongor on February 14, 2005, 5:06 pm
we had a low pitch roof when i was a kid. it used 'rolled' roofing. i cant
imagine they quit making it...
randy
show/hide quoted text
>I live in a house my parents bought in the
> late 1940's. In the back is a low-slope
> roof. The low-slope portion has been untouched
> since at least the 1960's if not the 1950's.
> This summer I had a new roof installed on the
> rest of the house. The roofer told me he would
> not do the low-slope part. I told him that suited
> me just fine because it never gave me any trouble
> and had been zero maintenance.
> It turned out that he sub-contracted out the
> entire job. He didn't watch "his guys" and
> they roofed the entire roof including the low-
> slope portion.
> The manufacturer said they
> would not warrant the low-slope portion because
> of insufficient slope. Another roofer told me
> the roof will not last.
> Problem: No one knows how to put the roof
> back the way it was. Everyone I have consulted
> about the roof says that the technology is lost
> and that any roof that is put there will have
> to be coated every three years.
> Have we regressed that much?
> Is it impossible to construct a low-slope roof
> (1.75 in 12) so that it does not need to be
> maintained?
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Posted by Colbyt on February 14, 2005, 7:43 pm
> I live in a house my parents bought in the
> late 1940's. In the back is a low-slope
> roof. The low-slope portion has been untouched
> since at least the 1960's if not the 1950's.
> This summer I had a new roof installed on the
> rest of the house. The roofer told me he would
> not do the low-slope part. I told him that suited
> me just fine because it never gave me any trouble
> and had been zero maintenance.
> It turned out that he sub-contracted out the
> entire job. He didn't watch "his guys" and
> they roofed the entire roof including the low-
> slope portion.
> The manufacturer said they
> would not warrant the low-slope portion because
> of insufficient slope. Another roofer told me
> the roof will not last.
> Problem: No one knows how to put the roof
> back the way it was. Everyone I have consulted
> about the roof says that the technology is lost
> and that any roof that is put there will have
> to be coated every three years.
> Have we regressed that much?
> Is it impossible to construct a low-slope roof
> (1.75 in 12) so that it does not need to be
> maintained?
Low cost solution is half lap roll roofing with full cement undercoat.
10-15 years.
Modern far superior product is full glue down EPDM. Think big rubber sheet
and you understand what this is. Not sure what the actual rating is but I
would guess 25-30 years.
Colbyt
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> comp. roofing, which failed within two years. Shingles are not applicable,
> as most manufacturers will void their guarantee for shingles if pitch is
> less than 4 inches - read the left over package covers on the product.....