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-   -   Do I need a roof radiation shield if I don't have any attic? (http://www.diychatroom.com/f17/do-i-need-roof-radiation-shield-if-i-dont-have-any-attic-156177/)

guitar548 09-08-2012 10:36 AM

Do I need a roof radiation shield if I don't have any attic?
 
3 Attachment(s)
I bought a storm collar that fits perfectly around the pipe. The only thing I can see that might be a slight problem as you can tell from the picture is you can still see some of the line holes from one side. Will that be a problem or don't worry about it?

Another question I have is the roof radiation shield do I need that if I don't have an attic? The only thing right now is plywood and shingles that is picture above. So do I need a roof radiation shield or the flashing be fine? Also the roof is a very low pitch at 1 1/2 pitch.

Here is a link to the roof radiation shield

http://www.ventingpipe.com/duravent-...e.com_p1762208

Thanks for your help
Evan

guitar548 09-08-2012 10:44 AM

http://www.ventingpipe.com/duravent-...e.com_p1762208

Here is the link again

tinner666 09-08-2012 11:04 AM

Determine where you have too much of the slotted excess flange hitting the collar and cut them back so it slips down the pipe better. In truth, all of them may need to be removed, but I can't tell from here.
As long as enough is left to steady the pipe, you should be OK.

tinner666 09-08-2012 11:06 AM

Well, come to think of it, you're supposed to strap the pipe to the rafters before it exits the roof to steady it and keep it off any wood surface and centered in the hole. Which could make leaving any of those flaps a moot point.

tinner666 09-08-2012 11:22 AM

Back to the question, I think I'd put it in the top of the chase below the roof area.

guitar548 09-08-2012 11:34 AM

Thanks telling me to support the pipes. I didn't think of that. So I do need a roof radiation shield then below the chase?

Thanks again

tinner666 09-08-2012 08:16 PM

Top of the chase if we're talking about the interior framing you've made.

Gary in WA 09-09-2012 11:05 PM

It appears you have some ceiling drywall missing, your fire-stop. And some rafters/ceiling joists, and insulation. Use straps every 4' of unsupported pipe, the rest will depend on the application, Figs. 18,19, 21,22; http://www.fornobravo.com/PDF/duratech.pdf
With about 39" of pipe above the roof, some chimneys require that plate only on 18" and bigger pipe.... consult the fireplace manufacturer. Go on-line for their installation instructions.

I'll move you to HVAC for more responses..

Gary


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