Effectively seal the garage roof

Many garage roofs are designed as flat roofs. Modern construction techniques allow for dense garage roofs even after decades, but the sealing of many older garage roofs is always as regularly recurring work. Below you will find information and tips for the effective sealing of a garage roof.

Various techniques for garage roof sealing

Flat roofs have either no inclination or only a slope of maximum three percent. For such garage roofs, efficient sealing is therefore the top priority. However, there are several techniques for sealing your garage flat roof. Not every sealing technique can be applied to every garage roof.

  • Garage roof with gravel pad
  • Garage roof with greenery
  • Garage roof with top sealing surface

In addition, another aspect is very important in the choice of the correct sealing of your garage roof. For this you have to distinguish whether it is a walk-in or non-accessible flat roof. If the former is the case, this means an additional massive mechanical load and must be considered in the choice of the optimal sealing materials.

Seal garage roofs differently

Garage roof with gravel pad

Under the gravel is usually a seal made of bituminous membranes, as they need special protection. The gravel

  • protects against damaging UV radiation
  • stores rainwater and picks it up
  • regulates the roof temperature to an acceptable level

Just the temperature regulation illustrates the importance of gravel. Without gravel, temperatures of up to 90 degrees Celsius affect the bitumen membranes. Then comes the destructive effect of UV radiation. With a layer of gravel, the average temperature is 50 degrees on average.

The bitumen membranes are laid on top of each other twice. First the first layer and then across the second layer. At the bumps, the tracks are fused together with a Bunsen burner.

Seal garage roof with greenery

For a garage roof with greening even more far-reaching requirements are placed on the sealing material. For example, the root system must not be able to penetrate the seal.

Seal the garage roof with EPDM rubber

EPDM films are produced on the basis of natural rubber. Therefore, these films have a high UV protection, so need no additional support. In addition, they are very durable and stable. Even mechanical influences are good for EPDM film to a certain extent.

Seal the flat roof with liquid plastic

The progress can also be seen in flat roof waterproofing. There are numerous variants of liquid plastics that are particularly elastic. In addition, they are extremely tear-resistant. Depending on the product, a fleece is first laid on the roof, then comes the liquid plastic.

The special features of the garage roof seal

Special attention must be given to potential weaknesses. These include, among others, the following structural features:

  • flashings
  • drain pipes
  • Elevations like fireplaces

Often, such structural features are additionally sheet metal sheathed. Here there is a very high risk for the smallest cracks, through which the water can penetrate later.

Tips & Tricks

It can often be read that with innovative liquid plastics you could even do without the gravel layer above the sealing layer. Have this checked by a specialist before, because often has the gravel and the task of complaining the roof, so as to ensure the tightness.

Modern liquid plastics combine with the topmost roof layer. When using such products, the roof must be cleaned absolutely accurately. Otherwise, dirt inclusions would act as a release layer which can adversely affect the sealing properties.

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