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Old 02-07-2011, 05:12 PM   #1
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preventing pipe freeze


Hi gang,
I'm building a 6'x12' addition on the side of my house for a master bath. The house is on a block foundation and a crawl space 3-4' high. The crawl space under the addition is about 3.5' feet high. I have NEVER had any trouble with pipes freezing. I'm in Atlanta. The lowest temp we see is around 20F. The crawl is completely uninsulated, and the furnace and water heater are under there. I was able to run the DWV pipe through an existing foundation vent. How large an additional hole do you think I need to allow enough warm air circulation into the addition to keep it warm enough? Or is there a better idea? Only the shower supply and all the drains need to run in the crawl. Sink and toilet can run through the common wall if needed.

Thanks for any ideas.

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Old 02-07-2011, 06:12 PM   #2
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preventing pipe freeze


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Originally Posted by ratherbefishing View Post
Hi gang,
I'm building a 6'x12' addition on the side of my house for a master bath. The house is on a block foundation and a crawl space 3-4' high. The crawl space under the addition is about 3.5' feet high. I have NEVER had any trouble with pipes freezing. I'm in Atlanta. The lowest temp we see is around 20F. The crawl is completely uninsulated, and the furnace and water heater are under there. I was able to run the DWV pipe through an existing foundation vent. How large an additional hole do you think I need to allow enough warm air circulation into the addition to keep it warm enough? Or is there a better idea? Only the shower supply and all the drains need to run in the crawl. Sink and toilet can run through the common wall if needed.

Thanks for any ideas.
Run the supply pipes in the joist bays. Insulate the pipes with pipe insulation and the bays with the insulation of your choice.
You shouldn't have any issue. I don't have one on Long Island(NY).
Ron

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