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Subject Author Date
icynene foam insulation sadiebelle 06-14-2007
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Posted by on June 14, 2007, 4:13 pm
We live in Northern New York. Our home has cathedral ceilings with no
air space to the metal roofing, in the winter we get severe
condensation and leaking. We were told that removing the metal roof
and having the spray foam put in then a 2" air space, plywood and
metal roof put back on would be the answer. Does the icynene work on
roofs or only attics? It can get as cold as -50 here and when the
heat goes thru the ceiling we need to have it stopped before it gets
to the cold of the metal. Please advise


Posted by Nexus7 on June 14, 2007, 4:36 pm
On Jun 14, 3:13 pm, sadiebe...@twcny.rr.com wrote:
> We live in Northern New York. Our home has cathedral ceilings with no
> air space to the metal roofing, in the winter we get severe
> condensation and leaking. We were told that removing the metal roof
> and having the spray foam put in then a 2" air space, plywood and
> metal roof put back on would be the answer.

If you can stand to have the ceiling dropped 4" or so, you could put
up drywall separated with 2x4 from the present ceiling, and fill the
air space with insulation.

> roofs or only attics? It can get as cold as -50 here and when the
> heat goes thru the ceiling we need to have it stopped before it gets
> to the cold of the metal. Please advise

Where do you get condensation? I'd think it'd be inside the house, not
between the ceiling and the metal roof. In that case, the warm air has
to be stopped before it gets to the present ceiling.



Posted by Joseph Meehan on June 14, 2007, 5:46 pm
sadiebelle@twcny.rr.com wrote:
> We live in Northern New York. Our home has cathedral ceilings with no
> air space to the metal roofing, in the winter we get severe
> condensation and leaking. We were told that removing the metal roof
> and having the spray foam put in then a 2" air space, plywood and
> metal roof put back on would be the answer. Does the icynene work on
> roofs or only attics? It can get as cold as -50 here and when the
> heat goes thru the ceiling we need to have it stopped before it gets
> to the cold of the metal. Please advise

Well, it will work, but it will only be 2 inches. That may or may not
be sufficient to fix the problem. In Northern NY I would think that only 2
inches even icynene would be minimal at best. It is possible to add more
above the current roof or below. I would want a second opinion from someone
in the business in the area. It just seems like you may regret not doing
more.

--
Joseph Meehan

Dia 's Muire duit




Posted by ransley on June 14, 2007, 6:31 pm
wrote:
> sadiebe...@twcny.rr.com wrote:
> > We live in Northern New York. Our home has cathedral ceilings with no
> > air space to the metal roofing, in the winter we get severe
> > condensation and leaking. We were told that removing the metal roof
> > and having the spray foam put in then a 2" air space, plywood and
> > metal roof put back on would be the answer. Does the icynene work on
> > roofs or only attics? It can get as cold as -50 here and when the
> > heat goes thru the ceiling we need to have it stopped before it gets
> > to the cold of the metal. Please advise
>
> Well, it will work, but it will only be 2 inches. That may or may not
> be sufficient to fix the problem. In Northern NY I would think that only 2
> inches even icynene would be minimal at best. It is possible to add more
> above the current roof or below. I would want a second opinion from someone
> in the business in the area. It just seems like you may regret not doing
> more.
>
> --
> Joseph Meehan
>
> Dia 's Muire duit

I dont know what R value icynene is but there is R 7.5 foam from
Honywell, R 75 would be great if you could do it, code for my area
zone 5 is r35 but codes are minimums and outdated, Id say R 40 would
be a minimum , I have R 100. Doing all that work and not putting in
enough R would be a waste.


Posted by Chris Friesen on June 14, 2007, 7:07 pm
ransley wrote:

> I dont know what R value icynene is but there is R 7.5 foam from
> Honywell, R 75 would be great if you could do it, code for my area
> zone 5 is r35 but codes are minimums and outdated, Id say R 40 would
> be a minimum , I have R 100. Doing all that work and not putting in
> enough R would be a waste.

Icynene is only R3.5/inch, but doesn't offgas and doesn't shrink as it ages.

Just curious...did you calculate the payoff period for R100 over R50?

Chris

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