Metal Cold Roof Question .....

theroofinggod

I covered it,whether the space between is 3",or a regular attic

Vermonster

Thank you god ... I know you did.

However, in the confines of my very specific topic and the snowy cold weather of my region, a "Cold Roof" is a very specific construction technique (double decking, etc), not just a roof that is cold on underside of the final finish material, whatever that might be: shingles. shakes. tiles, etc. Again, I am talking only about cold and snow because I'm not in Florida.

It is recognized by all trades associations as such. Just to mention one is the "Cold Roof Manual" by NTRMA and WSRCA. Here is a section:


My original question was very specific and simple: is the initially described metal roof installation a "Cold Roof" or not.

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tinner666

Would the Structural Roof Panels on long cleats qualify? They're about 3/8" higher than the seams. The roof is then suspended above the roof deck.
First time I walked on one, not knowing about it, I though I was walking on a mattress.The 24ga. panels would sag to the deck where I stepped, then spring back up.

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K2

No.

tinner666

Ah Hah. I see. The answer, as I know it, is indeed 'No'.

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theroofinggod

I`m in NY,BUT iSEE WHAT YOUR SAYING,NO BECAUSE IT`S PROTECTED BY INSULATION ONE SIDE

Vermonster

great ... thanks a lot for that input. That's what my opinion was and now I got confirmation.
Thanks again.

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theroofinggod

but as I think about it,w/no heat touching the insulation wouldn`t it all be the same temperature in the system?????

AaronB.

You will, indeed, find a \national standard on cold roof assemblies vs. warm roof assemblies.

A cold roof assembly is a roof that has the roofing/waterproofing not in contact with the insulation (most shingle roofing is cold roofing, but not cool roofing)

A warm roof assembly is a roof assembly which has the insulation in direct contact with the roof deck, with no ventilated air space between the insulation and the roof deck. Am I making sense? Most commercial steel bar joist and corrugated deck with insulation atop are warm roofs.

Ed?

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Vermonster

that's precisely my understanding .........

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theroofinggod

but if the insulation is above the cool roof space,wouldn`t they technically be no more than padding/firring strips ??