Condensation on a metal roof: causes and remedies

The problem is the appearance of condensation under the roof. It would seem that small drops of water cannot do harm, but they are not.

If there is a lot of moisture, then it will penetrate into the insulation and this will deprive it of its thermal insulation properties. Mineral wool suffers more often. It falls into disrepair after 2 years.

The reason for the appearance of condensation is the temperature difference between the air and the roofing material. Perhaps the roof is poorly insulated, a low-quality vapor barrier has been used, or there is none at all.

Poor ventilation is also a cause of condensation. Ventilation can be made forced, for example, a roof aerator. It is used for metal roofing, corrugated board. The aerator is a pipe with a cap and a roof rail. The aerator is installed after or during the installation of the roof.

Let us analyze now how to avoid condensation between the insulation and the tiles.

Experienced builders recommend using ceramic, composite tiles or other material with low thermal conductivity when installing the roof.

Correct installation of thermal insulation material will prevent the accumulation of condensation. The layer thickness must be at least 20 cm.

See how the waterproofing membrane is installed. Often, during installation, it is made to stretch. As a result, its integrity is violated. The material must be laid loosely. If there are holes in the material, then they must be sealed with a piece of similar material using construction tape.

Metal tiles cannot be installed directly on the crate. The metal will condense in the winter and water will drip directly onto the floor. The counter lattice for metal tiles creates a ventilated gap between the layers of the roof. Without a counter grid, condensation will accumulate on the bars.

One more moment. Do not violate the technology when installing the vapor barrier. Joints and abutments to the chimney and walls must be glued with tape or special. tape.

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