DIY Network

Roofing and Flashing Tips

A bad roof can be a mold generator. Check out these tips for keeping a roof maintained and preventing mold in a home.

More in Remodeling

flashing seals areas of transition or penetration

  • All homes should have a tight roof construction, with sheathing of 1/2" plywood or OSB. Proper sheathing ties the rafters together and supports the shingles. When improperly installed, sheathing can buckle and cause larger holes around the nails resulting in leaks.

  • A good underlayment (usually 15- or 30-lb. felt) between the roofing shingles and the sheathing, is essential.

  • Flashing seals areas of transition or penetration (where architectural features, exterior electrical features, plumbing or the roof and walls meet).

  • Venting: 1 square foot per 150 square feet of attic floor. Half the vents should be at the eaves and half at the ridge.

  • Guttering can keep the moisture away from the sheathing.

  • Remove overhanging tree branches to dry out roof mold.

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