Attic Sprayfoam Around Vent Pipes

That whole area of my attic is hot as viewed through their thermal camera.

Attic sprayfoam around vent pipes.

The plumbing vent also known as a vent stack helps regulate the air pressure in your plumbing system. 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. Nothing unusual about that. 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.

What is a plumbing vent. 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. 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. To start your home insulation project look for openings where pipes wiring and ducts penetrate walls and floors.

Earlier this year i got a question about a home that had spray foam insulation in the attic. 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. Find out where. I see situations around like this sometimes.

Vent humid air from kitchens and bathrooms to the outside instead of the attic to avoid this problem. 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. 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. 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.

You then see blue on the roof line where cold air is leaking in. For some homes the pipes will run underneath a subfloor or at the bottom of the attic. 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. In this case the attic is still vented and the attic floor insulation will remain.

Don t forget to check your basement insulation and crawlspace insulation as well. There are 3 vents in one area and 2 in another. These can occur around recessed lights chimneys vent stacks windows doors and rim joists where the house framing meets the foundation. Roof leaks around vent pipes is relatively common.

Attic condensation is due to humid air leaking or vented into the attic.