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Posted by Noon-Air on March 21, 2008, 8:50 am
> On Fri, 21 Mar 2008 02:26:10 -0500, Don Ocean
>
>>Kenneth wrote:
>>> On Thu, 20 Mar 2008 19:07:35 -0500, "Noon-Air"
>>>
>>>>> On Thu, 20 Mar 2008 19:00:43 -0400, "Stormin Mormon"
>>>>>
>>>>>> Probably less labor to foam over. And the R-value is added.
>>>>>>
>>>>>> I'd say leave the old stuff.
>>>>>>
>>>>>> --
>>>>>> Christopher A. Young
>>>>> Hi Christopher,
>>>>>
>>>>> It certainly seems that I am moving in that direction...
>>>> Before you even think of foaming over the old insulation, you need to
>>>> make
>>>> sure that the ductwork is correctly sized and each drop has the correct
>>>> airflow for that space. It would also be a real good idea to make sure
>>>> that
>>>> the old insulation is *as new* before covering it with anything. Once
>>>> its
>>>> foamed over, your done....and its gonna be a real PITA to correct any
>>>> and
>>>> all problems or issues with air distribution.
>>>
>>> Hi again,
>>>
>>> Of course you are correct, but we have no distribution
>>> related problems at all.
>>>
>>> We have checked it all out quite thoroughly, and all seems
>>> designed properly, and sealed and insulated poorly.
>>>
>>> All the best,
>>
>>What happens when the cat crawls up there and dies in an unreachable
>>spot. Foaming permanently is ridiculous. Can you imagine crawling around
>>an attic/crawl space hacking holes in it..hoping you have the right spot
>>to repair ducts/plumbing/Electric/cable/phone/God knows what!
>
> Howdy,
>
> How might the "cat" get into such a sealed system?
>
> But beyond that, based on what I have described of our
> situation, what would you suggest?
It doesn't have to be a cat, it could be a squirrel or anything else. As
others have said, if you have to have any electrical work done, or run phone
lines, or cable, or anything else, spray foam is just not a good idea.
You stated earlier that the ductwork is correctly sized....what method was
used to determine proper size?? What type of material is the ductwork?? Was
air balancing done when the ductwork was installed?? What size and type of
heating/cooling system is it?? What method was used to determine the size of
the system?? Where are you located?? When was the house built?? What kind of
construction?? How big is the house??
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