While it's impossible to keep a roof dry at all times, roofs that stay damp can be particularly troublesome for homeowners. While not typically visible to the naked eye, a damp roof could be the source of rotting and deterioration. Homeowners who suspect their roof isn't getting dry when the sun is out should consider talking to a Houston roofing company about the best options to solve the problem.
In some cases, moss and algae will grow on a damp roof. The moss will be visible as large green clumps of growth. Algae typically reveals its presence in the form of black streaks across the roof. Sometimes, this is a benign problem, even though it can be unsightly. The presence of moss, on the other hand, carries a possibility of developing beneath the shingles, thereby disfiguring them. Moss and algae should be gently scraped off the roof or killed off with a chemical solution. Though it could be tempting to make use of a power washing machine, this technique can cause damage to the shingles.
Damp roofs can also cause the growth of harmful mold and mildew. This typically occurs when the dampness seeps through to the roof's wood underlayment. Mold from the roof can potentially spread to living areas, particularly in Cape Cod style homes, where people may be sleeping close to the roof area.
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The spores that are released into the area as a result of mold infestation may result in respiratory problems for homeowners, and it's possible that large pieces of the underlayment will need to be replaced.
The areas that stay damp may also experience warping or rotting of the wood in that area. This leaves areas of the roof unprotected, and water is more likely to seep in and cause more extensive damage. If possible, it's a good idea to identify the source of roof dampness and to try to resolve that problem. In some cases, for example, water does not drain properly from the roof and soaks into the bottom areas by the gutters or in the roof's valleys. Trees blocking the sun can also cause parts of the roof to stay damp. Consider trimming or cutting down overhanging trees.
Those who can't easily resolve the issues that cause dampness should consider looking into roofing alternatives, such as metal roofs. These types of roofs don't suffer the same amount of damage as those made primarily of wood. Always talk to a roofing expert before making a final decision.