Roofing compactor: providing ventilation under the roof

Completion of the roof construction is always exciting. Whether the construction will flow will depend largely on the proper installation of the skate. A competent installation involves the use of such an element as a roofing seal. What types of specialized pads under the ridge exist and what they are for, you can find out by reading this article.

Tasks of the Skate

Skate is located at the highest point of the roof, on the line of skates at the top parts of the truss system. His "duties" include:

• To make the roof complete . After all, it is on this part that a person’s attention is focused when he wants to evaluate the entire roof as a whole.

• Close the slot formed between the two ramps and seal this joint.

• Provide ventilation of the space under the roof. Otherwise, condensate will inevitably accumulate in a closed gap. This will lead to a decrease in the overall strength of the construction of rafters over time. In addition, moisture accumulates in the insulation and it reduces the positive properties of a warm roof.

At first glance, the last two points contradict each other. When installing the ridge on the joint of two sheets of metal or corrugated board, gaps are formed between the ridge element and the surface of the roofing material, due to its wave structure. These holes, just contribute to the ventilation of the attic space, but allow precipitation, in the form of rain and snow, to get inside.

A seal under the ridge should come to the rescue . Made from a special material, he combined in himself two contradictory properties: to achieve sealing of the space while retaining the ability for ventilation.

Types of roof seals

Seals are divided into profile and universal. Three types of it are mainly used:

• Specialized hard . In its manufacture using high-pressure polyethylene foam (LDPE). All cells formed by the profile of the metal are closed. There is a separate gasket for each model sheet overlap.

• Universal, with self-adhesive film . It is made of polyurethane foam (PUF).

• Self-expanding universal self-adhesive . It goes on sale in the form of compressed polyurethane foam tape (PSUL) impregnated with acrylate-polymer composition.

Characteristics

All seals for the roof are made of a material that does not harm the environment. And for them we can distinguish common properties:

• Resistant to UV and environmental effects.

• They differ in long-term use without losing their qualities.

• flame-resistant .

• Easily tolerate sudden temperature drops .

• Not susceptible to the action of aggressive substances, including chemicals.

• All without exception are water repellent .

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It must be said that the seal for roofing made of corrugated sheet has the same properties as for metal tile or ondulin.

Rigid gaskets, designed for individual profile models, have better performance in the field of noise insulation and thermal protection. This is due to the fact that these properties are better in foamed polyethylene than in polyurethane. Also, a distinctive feature is the service life - up to 90 years.

But, due to the inability of the material to "breathe," there is no ventilation under the ridge. In order to fix this important ability, release gaskets with drilled holes for air circulation. This detail practically equalizes this type of seal with others.

But the universal self-adhesive compactor for the roof works like a filter.

The most popular among users has gained sample. A feature of this tape is that after installation it expands for several hours, filling all possible indentations. This process can go from 1 hour to 8. Upon completion, the seal takes the form of a metal tile profile, completely sealing all cracks.

It also has filter properties, but unlike the other two, it has a slightly smaller temperature range during operation: from -45 to 85 ° C. Whereas the above described calmly carry a drop from -60 to 90 ° C.

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Replacing standard gaskets

Some builders may use other materials that are not a roof sealant. For example, called the aeroelement skate, a special tape. Its middle part, which has the ability to ventilation, is located at the junction of the sheets covering the roof, and the sticky edges fit snugly to the surface of the metal tile or profile.

Another polyurethane sealant or foam is used. There are winter samples that withstand temperature drops from -40 to 90 ° C. But to create a beautiful and neat joint, you must manually remove the excess and paint the ridge. In addition, there are problems with ventilation.

Features of installation

Regardless of the type of seal and roof, the installation of gaskets under the ridge is done according to a similar algorithm:

• ) a sheet of corrugated metal or metal tile, along the installation line, double-sided tape is stuck.

• Pressing evenly and without stretching, a sealant is glued.

• A sealant is applied to the surface of the gasket .

• Set to and the horse is fixed.

In conclusion, I must say a few tips that will help when working with such with the material:

• When laying, the sealing tape do not pull out and do not bend.

• If you need to connect or grow, this is done to the joint .

• You can carry out the installation and in the cold . But then the gasket before installation must be kept warm.

• The self-expanding universal sealer for a roof will fill all voids faster if you warm it with a building hairdryer within a few minutes right after installation. Need to work at a distance of 150 mm.

In the video you can see the installation of the ridge of the roof:

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Conclusion

It is extremely imprudent for the developer to use other material instead of the compactor. The desire to save can have a "disservice" when you have to overhaul the roof, because of poor quality substitute. Or because the seal was not installed at all.

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