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.
flashing seals areas of transition or penetration

flashing seals areas of transition or penetration

Flashing

  • 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.

Keep Reading

Next Up

Maintaining Roof Shingles

These tips and general information on cleaning and preserving roof shingles will help keep a home looking maintained in the long term.

Top 10 Roofing Tips

Here are 10 things you must know about common roof leak locations and how to fix them safely.

Home Siding and Crawlspace Tips

Summer home maintenance just got easier with these valuable tips on maintaining a home's siding and what to look for in a crawlspace.

Roofing Buyer's Guide

Learn how to tell if it's time to replace your roof, and get information on the latest roofing materials and approximate costs.

Tips on How to Weatherproof a Roof

Use these expert tips to protect your home. Learn how to keep the elements out and comfort in.

A Roof Over Your Head: Choosing Materials

Check out this information regarding the various types of materials that can be used to cover a roof, as well as which ones might be best for you.

On TV

Get Social With Us

We love to DIY. You love to DIY. Let's get together.

Consult Our A-Z Guide

Everything You Need to Know

Browse a full list of topics found on the site, from accessories to mudrooms to wreaths.  

How-To Advice and Videos

Get video instructions about kitchens, bathrooms, remodeling, flooring, painting and more.

Watch DIY Downloads Now

Watch DIY Network LIVE

Don't miss your favorite shows in real time online.