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Question:

is it safe to put insulation in the corners where the roof meets the wall in attics?fiberglass in corners?

is it safe to put insulation in the corners where the roof meets the wall in attics?fiberglass in corners?

Answer:

No it is not EVER safe! Roofing material needs to breathe. Anywhere that insulation is applied to the underside of the roof deck the roofing material will warp and then leak. You have to have a cushion of air between the underside of the decking and the insulation
If you have vented soffits, you have to stay away from the corners where the outside wall meets the roof. It is best to install insulation baffles to the roof sheathing to keep the fiberglass from stopping the natural ventilation through the soffit vents into the attic. They can be purchased at home improvement store.

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