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The number of roof vents necessary for a 2,000-square-foot house depends on several factors. The calculation depends on the net free area within the attic and whether your municipality requires a 1/150 or a 1/300 ratio of venting square feet to attic square feet. If you install vents with a square-foot opening of one, you'll need either 14 or seven exhaust vents and an equal square-foot amount of intake vents.

Maybe you waited a little longer than you should have before dealing with the snow accumulation on your roof, and now you are wondering if there is risk of roof collapse. Here are some signs you should look out for: a sagging roof, cracking and cracking sounds, cracks in walls, and leaks in your attic and ceiling.

If you suspect potential roof collapse, do not delay. Take immediate action. Call a professional roofing company and get an inspection. You may want to move your belongings to a safe place and relocate your family until everything has been taken care of.

You cannot replace granules that have been lost off shingles. The granule embedding process is part of shingle manufacturing, and once the bond holding the granules to the shingles has been lost, the granules are gone for good. Shingles with granule loss must be fully replaced to continue offering adequate protection.

Sometimes. Professionals may be able to remove the old roof and re-attach it when completed, depending on your blueprints. That can help you save money. But this method is not without its risks. Larger roofs may crack during the transportation process. And if the roof is old or has problems, it may be better to replace it entirely. Keeping the old roof isn’t always possible if you are making significant alterations to the roofline.