The Causes and Prevention of Roof Blistering

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The Causes and Prevention of Roof Blistering

The Causes and Prevention of Roof Blistering

If your roof has experienced recent roof damage or received a poor roofing installation, you may see shingles or sections of your roof blistering. Blistering is a common problem that often calls for fixation by residential roofing contractors. Most of the time, people mistake blistering for hail damage. Because of this, it is critical to understand the causes of roof blistering and how you can adequately manage this problem.

Over time, blistering roof shingles have continued to be the most controversial subject matter in the roofing industry. Inconsistent bubbles rising up from inside the shingles are characteristic of a blister. Asphalt roof shingles experience this phenomenon because it a byproduct of manufacturing or installation. Usually, singles are composed of different layers of materials, and while undergoing lamination, moisture may be trapped between the roof layers. Later on, during the application of heat, gasses can expand from that trapped moisture creating bubbles underneath the top layer of the shingle. Some certain resins may also release gases if you do not maintain proper cure cycles resulting in the same bubble-like formations that you can easily notice from the surface. There may be occurrences of larger blisters the over-application of certain adhesives during the installation process.

Over time, the damaged areas will decrease your roof’s life expectancy. With these blisters’ consistent exposure to the environment, they will undergo wear from wind and rain. Alongside the thinness of the blistered surface, this results in erosion of the blistering roof shingles. Ending up in crater-like structures lacking the granules of the surrounding roof. Depending on the amount and duration of exposure your roof receives, these pits may shorten your roof’s life expectancy.

Causes of Roof Blistering

Usually, blisters appear as a result of excessive heat damage on the roofing materials. Consequently, this is a common problem during the summer due to the heat. Blisters will form on your roof if you have no way of blocking direct sunlight to a roof. Trapped moisture rises to the surface when the sun heats the shingle resulting in blisters.

Another major contributor of roof blistering in line with the International Association of Certified Home Inspectors is poor ventilation. Inadequate ventilation in the attic causes the roof environment to become too hot for the shingles, eventually causing blisters.

When moisture gets underneath the shingles, it creates blisters on your roof. Excess heat from the sun causes evaporation of the water leading to the expansion of the roof materials. This eventually leads to the spreading of the blisters and shingles to the other parts of the roof, resulting in further damage. Improper application of shingle adhesive will also permit the creeping of moisture under the shingles. For this reason, it is critical to examine moisture damage professionally before the situation worsens.

In some cases, the problems occurring during the manufacturing process will affect the manner in which shingles look or perform. These defects create areas or weakness, eventually leading to faster deterioration of the areas of the shingles when weathering occurs. However, it is important to note that defects that can cause poor performance or shorten shingles’ lifespan may not be very apparent following installation.

How do you Prevent Blistering Shingles?

The best thing you can always do is to choose quality asphalt shingles when constructing a new roof. Making a good choice will go a long way in preventing blisters since good shingles may be durable enough to avoid blister popping at least. Provided the vapor contracts or the moisture evaporates, the blisters should just go away without resulting in any real damage to the roof. It would help to know that blisters can pop from slight impact or if you accidentally step on them during a roof inspection.

Most of the time, blistering will occur within the first year after installing new shingles. Since small blisters normally do not lead to leaks in your roof, it is possible to ignore them. However, addressing this problem sooner rather than later may help you a great deal because blistering is likely to reduce your shingles’ life span.

Because blisters create a separation between the base of the roof and the shingle, it is highly possible that the blisters will pop ad make your roof less visually appealing. If you replace a section of your roof that is affected by this damage, you can help your home retain its value and beauty.

For your damaged attic, minor repairs and proper attic ventilation will help you avoid problems related to roof blistering. Additionally, you can call in a roofer to ensure there are no risks for leaking if the blisters reflect moisture damage. Addressing attic ventilation will be a major milestone. While blistered shingles can be replaced, it is important to address the main cause so that you can avoid the likely problems in the future. The chances are that if your house may be lacking in attic ventilation, your home may be having damaged insulation, uncomfortably hot indoor spaces, and increased energy bills during the summer. It is also possible that there may be ice dam formation and potential structural damage from the trapped heat and moisture. Ensure your roof has vents at the ridges and at the eaves to allow proper venting. If your roof needs replacement, ensure that you make proper attic ventilation as part of the new roof.

Often, the manufacturer’s defects can be seen on the shingles before installation. Inspecting the pallets of shingles is a simple way of seeing whether that particular batch of shingles had an instance of blistering since not all pallets come from the same batch. If you need help with your roofing, contact a trusted roofing company for a free roof inspection today!


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