It could be because the spray foam contractor didn t seal off all the air leaks.
How to find a roof leak with spray foam insulation.
Convenience polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials.
Follow damaged insulation back to the source of the roof leak.
A sealed and insulated roof deck can t dry inward to the attic if the roofing happens to let water.
Moisture from indoors can diffuse through the foam and find the cold roof sheathing where it accumulates and eventually rots the roof.
Spread the foam quickly over the surface with the putty knife to smooth the foam over the area where cracks are just starting to form.
Spray a light layer of foam on any areas where hairline cracks are beginning to show.
Applying closed cell spray insulation to the underside of a roof deck at the sheathing to truss connection can double or triple the strength of the assembly boosting the roof sheathing s resistance to wind uplift in a hurricane.
Open cell spray foam insulation is risky in all climate zones we already know open cell spray foam is risky in cold climates.
However i do have a concern about spraying foam directly on the underside of the roof sheathing and rafters.
From spotting signs of roof leaks to implementing fail proof solutions we explore the importance of repairing your roof and how spray foam offers structural integrity to your ceiling and a whole host of benefits besides telltale signs of a leaking roof.
So if you encounter a patch of mold which thrives on moisture chances are you ve found the vulnerable point in your roof.
Spray foam insulation nightmare.
Both papers basically came to the same conclusion.
Check the rh levels in your attic over the course of a few weeks to see if the air is holding a lot of moisture.
But foam also traps moisture in the roof in case of a leak.
What can happen if it s not installed correctly cbc marketplace duration.
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Let both areas dry for at least 24 hours.