Preventive roof maintenance can extend its life, yes. However, the fact that you have not experienced roof failure yet does not necessarily mean that it does not need a replacement. If replacing an old and worn roof is delayed, chances are it would cause bigger issues later. Highlighted below are some of the signs that it is time to reroof:
A sagging roof should be a cause for panic. It is usually an indication of a serious structural problem, primarily when ceiling joists pull away from the roof’s rafters. Sagging might also occur when the supports in the foundation are compromised. Unless you are an expert, it is advisable to seek the help of a professional roofing contractor in Northern VA.
Curling and buckling shingles
Shingles curl by cupping and clawing. Cupping takes place when the edges turn upward while clawing occurs when the middle of shingles comes up, but the edges stay flat. When this happens, your roof is likely to start leaking the next time it rains. Other shingle problems that you should not ignore are bald patches owing to missing granules, granules in the gutter, and cracked and missing shingles.
Moss and algae
While the presence of moss or algae is no reason to panic, heavy presence of the same on a roof makes it unsightly. In most cases, most homeowners make the mistake of scraping away or power washing the green stuff. Washing it with water and the right amount of bleach can work. However, the best solution would be to replace the shingles with algae-resistant ones.
Moisture in the decking
Wetness in your roof’s insulation is a sign of trouble. If the roof feels squishy or spongy whenever you stand on it, it is proof that the decking is weak due to exposure to moisture. Daylight through your roof is another sign of a weakened roof.
In case your roof is 20 or more years old, consider replacing it. If it has a single layer of shingles, has poor ventilation or its shingles were installed over other layers of the same, you should consider replacing it.