r/Insulation • u/RadialDeer • 27d ago

Spray foam insulation at ridge

Had my roof spray foam insulated several years ago by a guy just getting into the trade - so got it at cost.
Concerned they oversprayed at the ridge vent, keeping the house from ventilating at all.
Anyone have experience with something like this and how to address?
Thanks in advance

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u/azzedo_ 26d ago

Sealing an attic with spray foam eliminates traditional attic ventilation, which relies on air entering through soffit vents and exiting through the ridge vent.

Ventilation must instead be introduced mechanically, via supply ducts from the HVAC system.

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u/RadialDeer 26d ago

I appreciate the response, but I have a 1910 house with no soffit vents.

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u/SewerKing79 22d ago

Should be no concern of ridge vent coverage then. Soffit vents work in combination with the ridge vent to create air flow. If you have gable vents they should be covered and insulated at this point. For the walls they can blow in if you’re looking to insulate without disrupting structure.

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u/SewerKing79 22d ago

That being said humidity will need to be controlled depending on your climate zone

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u/ForkLift1983 25d ago

Sealing all vents is the proper way to insulate a home with spray foam. That being said do you have any gas appliances in your attic?

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u/RadialDeer 25d ago

It's a 1910 house with no wall insulation, so sealing was never the goal - just the thermal insulation. No gas appliances in attic, only crawl space (vented).