Roofs are a large expense when they need replacing. That is why it is important be able to identify the possible problem areas when purchasing a new home or deciding if your existing roof needs a simple repair or replacement.
This article lists 7 different problem areas on roofs.
From the article:
Roof material deteriorates with the direct exposure to weather inclemency’s. Inorganic roofing materials are less susceptible than organic materials. Exposure to pollutants or industrial atmosphere may accelerate the decay of your roofing material.
2. Lack of Maintenance
This is most common on flat or low-sloped roofs. Failure to correct uneven roof will cause accumulation of sediments and water that will eventually destroy your materials.
3. Design Problems
Design related problems are expensive to correct, and normally the corrections must be done while the replacement of the roofing material is undergoing.
Some examples are:
-Weak structure supporting the roof that might deflect excessively under active loads.
-Improper roof slope, sagging roof or inadequate drainage system, resulting in accumulation of water.
-Incorrectly system to allow expansion and contraction at changes in deck material or changes in direction.
-Incompatible roof materials.
The vacuum and the uplifting pressure created by wind, blowing over the edge of the roof, can partially rip the roofing membrane or system that has been applied. The roofing and insulation must be fastened and secured to the perimeter and to the main roof structure to counteract the forces that are being exerted on the roof.
5. Flashing Material
The function of the flashing is to provide a seal, a watertight seal, between roofing materials, roof sections and other parts of the building. This is an area that should be carefully inspected prior to any other areas. Incorrect installation procedure or attachment, and improper sealing of the flashing will allow the water to enter between the roofing systems and the roof structure. Sometimes, installing a flashing over a joint or cap will eliminate the problem if it is detected early in the construction.
6. Base Flashing
Base-flashing problems also present some serious and important areas that you must inspect.
Some common causes are:
-Insufficient number of base-flashing piles.
-Incorrect fastening to the surface.
-Loose insulation below.
7. Penetration Flashings
Either small or large penetration flashing can fail in several ways.
As a matter of example:
-Broken seams in metal curbs due to building movement.
-Deteriorated counter flashing.
-Improper finishing of metal surfaces.
-Standing water behind penetration curbs.
8. Drain Flashing
It is not a simple as installing lots of drain openings. The building’s drain system should consist of reasonable drain openings, adequate pitch from high point to drainage components. It is a good practice to include overflow scuppers through different areas to avoid accumulation of water in case on an emergency. Proper maintenance should be given to all of these areas.
If you ever have questions about home inspections or pest control, feel free to give Kevin or Jeff a call at 225-753-8114, or email us at email@example.com, and we’ll be glad to help.
To view the entire article click here:http://construction.about.com/od/Inspection/tp/Identifying-Roof-Problems.htm