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IDENTIFYING SIGNS OF ATTIC LEAKS

Even though most roofing shingles are designed to last 15 years, problems often develop when the roof reaches eight to ten years of age. Often leaks are difficult to find and can cause significant structural damage later. Therefore, it's best to know the following signs of attic leaks/moisture:

Structural sagging, wavy roof frame and sheathing;

Damaged, worn or missing shingles;

Moss growth;

Corroded flashing around chimney, dormer or vents;

Raised shingles along the bottom of the roof;

Icicles hanging from gutter;

Stained/discolored or delaminating sheathing;

Rusted nails and rust stains on sheathing;

Damp or discolored insulation;

Water spots or black marks on the ceiling or at the junction between walls and ceiling;

Water marks around ceiling fixtures.

There are numerous contributing factors to leaks in the attic. Some tell­tale indications that leakage may be - or become - a problem include poor roof slope design, improper shingling, deteriorated chimney or exposed nails on the roof. Such problems don not stand up as well to elements such as wind, rain, moss or water vapor.