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  1. #1
    imported_John Smith's Avatar
    imported_John Smith Guest

    Default Icynene attic insulation and radiant barriers

    Im always concerned about the ability to locate a roofing leak from within the attic in homes with Tech Shield or foil products stapled all over the place.


    Listening to the radio yesterday, there was a show on about using Icynene insulation under the rafters to make the attic space air tight.

    This too would seem like something that would make looking for roofing leaks within the attic impossible (even for the IR guys). I suspect that water penetrating the decking with an icynene product would allow the water to just continuously soak and rot the decking before it would have any hope of being noticed by anyone.

    Thoughts????

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  2. #2
    Join Date
    Mar 2007
    Location
    Spring Hill (Nashville), TN
    Posts
    5,847

    Default Re: Icynene attic insulation and radiant barriers

    Quote Originally Posted by imported_John Smith View Post
    Im always concerned about the ability to locate a roofing leak from within the attic in homes with Tech Shield or foil products stapled all over the place.


    Listening to the radio yesterday, there was a show on about using Icynene insulation under the rafters to make the attic space air tight.

    This too would seem like something that would make looking for roofing leaks within the attic impossible (even for the IR guys). I suspect that water penetrating the decking with an icynene product would allow the water to just continuously soak and rot the decking before it would have any hope of being noticed by anyone.

    Thoughts????
    Yep, that is one of the problems with it.

    Scott Patterson, ACI
    Spring Hill, TN
    www.traceinspections.com

  3. #3
    Join Date
    Feb 2010
    Location
    Omaha
    Posts
    143

    Default Re: Icynene attic insulation and radiant barriers

    I think it would be a great way to build a house provided you did something with the roof. I would not put a standard shingle roof on a house like that. It would have to be a much more durable roof to last 50+ years. You could do some things with underlayments and battens to give give a drainage plane. Also with a layer or two of polystrene to combat thermal bridging and to create a multilayer roof thus providing layers of protection. Only the plumbing vent stack would need to penetrate the roof.


  4. #4
    Joe Billman's Avatar
    Joe Billman Guest

    Default Re: Icynene attic insulation and radiant barriers

    Check put the provisions of the recent IRC. The changes incorporated specific requirements for roof deck insulation, similar to low slope shingle requirements.


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