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Posted by tom on July 6, 2006, 9:23 pm
It's nice to hear from a roofer who's erudite. You've explained your
reasoning well. I've had my share of difficult tear-offs, especially
when I'd wanted to be kind to the neighboring shingles, but doesn't it
seem that the instance you've given is more of an exception than the
rule? I roofed in my home state of Michigan for 20+ years, before
"retiring" to AZ. Granted, "Tornado Alley" it wasn't. Get this: Here in
AZ, the roofing suppliers have _never_even_heard_of step flashing! I
have to cut and bend my own. It appears that roofers here just goop it
to the wall!!! One can make a pretty good living off most of the
roofers of today. Tom
Mois=E9s Nacio wrote:
> Tom,
>
> I'm not going into great detail, but the tidbits I list, all have a beari=
ng
> on the end result.
>
> You may or may not know, major manufacturers, manufacture covering for
> different regions. Usually about half a dozen regions in the United State=
s=2E
> There's not one shingle that is formulated/manufactured to be used across
> the entire country, by any major manufacturer. Although, I know of one th=
at
> breaks down the USA into 3 regions.
>
> One manufacture in particular, has a huge problem of keeping their product
> straight for packaging. You probably ran across this one in your time,
> where shingles are stuck together, simply because the product wasn't
> straight when it was packaged.
>
> Quality control fluctuates even in ISO certified conditions.
>
> The adhesive put on the back on the covering for the release tape also wi=
ll
> fluctuate, once in awhile there are excessive amounts beyond the amount
> called in the specifications to keep the release tape on, more often than
> not, this seems like a normal amount.
>
> For the average 3 tab 12x36 shingle, installed for average pitch/climate
> conditions, there will be 8 nails in it. As you know, you must remove the
> nails from the shingle/s above and adjoining the deficient shingle. You
> also must break the tar _seal_ with a flat bar, which is best done with t=
he
> covering cool. Now, if the release tape has been removed, and the adhesive
> was excessive either by intention or by fluctuation, you now have another
> area which has sealed. The problem is, you must get the flat bar under a
> full 7" or 2" above the keyway. Problem is, if this is done when it is
> cool, and the covering has lost flexibility to where you can't bend tabs
> without breaking, it creates an additional barrier in which you must work
> around. I won't even go into the problem of replacements when the covering
> is hot, and adhesive is sticky.
>
> Manufacturers spend millions of dollars for design, although some spend
> more in advertising than in product design. When you see the product is
> manufactured with tolerances of +/- 1/4", it is the manufacture who spent
> on advertising, instead of design.
>
> A quality roofing product is designed so the entire roof doesn't come off
> in highwinds, of course there is only so much of a guarantee the
> manufacturer can be liable for.
>
> I did a lot of work in my days, in tornado alley. I seen some installers
> trying experiments on structures, selling it as snake oil. I've worked on
> countless structures, where removal of release tape caused problems.
>
> You of course, apparently never ran into a problem when the release tape
> had been removed. I find that interesting.
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