Attic Sprayfoam Around Vent Pipes

Just as drain pipes remove water and waste from your home the plumbing vent pipe also known as a plumbing air vent removes gas and odors it also allows fresh air into the plumbing system to help water flow smoothly through the drain pipes however no water.

Attic sprayfoam around vent pipes.

The leaking may first be seen in the attic but if you don t catch it right away you may see water coming into the house dripping on the floor. A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents. You then see blue on the roof line where cold air is leaking in. Find out where.

For some homes the pipes will run underneath a subfloor or at the bottom of the attic. Roof leaks around vent pipes is relatively common. Earlier this year i got a question about a home that had spray foam insulation in the attic. Greetings this is the first time i have seen open plumbing vents in attic and btw no roof exhaust vents either it was constructed 2014.

To start your home insulation project look for openings where pipes wiring and ducts penetrate walls and floors. Nothing unusual about that. What is a plumbing vent. I like the idea of the wrap especially since this area is a 4 12 pitch and to effectively tin and fire caulk would be a real feat versus wrapping then spraying at each end to seal.

In this case the attic is still vented and the attic floor insulation will remain. I have a customer that we are doing some work in the attic for and i noticed yesterday that the plumbing is vented up into the attic phew and not thru the roof. Don t forget to check your basement insulation and crawlspace insulation as well. Vent humid air from kitchens and bathrooms to the outside instead of the attic to avoid this problem.

A roof that leaks around a vent pipe is a common cause of small water stains on a ceiling or water leaking into a home. You will need to locate the pipes in your attic obviously to measure them and know what level of difficulty you will have in covering them. These can occur around recessed lights chimneys vent stacks windows doors and rim joists where the house framing meets the foundation. Attic condensation is due to humid air leaking or vented into the attic.

If the intent of installing spf to the roof deck was to create a conditioned attic non vented then the recommendation would be to first remove any insulation and vapor retarder from the attic floor then to install spf on the roof deck and gable walls. My training tells me this would not be ok because of moisture odors unhealthy gas etc not to mention ability for insulation and mice to go down. That whole area of my attic is hot as viewed through their thermal camera. It is in missouri which i think they may allow aavs on a limited basis but i don t see how this is ok at.

For other homes the pipes might be located in the walls or the roof rafters.