kattosuoja

Kattosuoja, often translated as roof protection or roofing underlayment, refers to a layer of material installed beneath the primary roofing material, such as shingles, tiles, or metal. Its primary purpose is to provide a secondary barrier against water infiltration, safeguarding the roof deck and the building's structure from potential leaks. This layer is crucial for the longevity and integrity of the roof system.

Common materials used for kattosuoja include asphalt-saturated felt paper, synthetic membranes, and rubberized asphalt. The specific type of material chosen often depends on the climate, the type of roofing material being installed, and local building codes. For instance, in areas prone to ice dams, specialized ice and water shield membranes are often used in critical areas like eaves and valleys to offer enhanced protection.

The installation of kattosuoja is a critical step in the roofing process. It is typically laid directly onto the roof sheathing or decking before the main roofing materials are applied. Proper overlap and sealing of the underlayment are essential to ensure its effectiveness in preventing water from seeping through. While not always visible once the roof is complete, kattosuoja plays a vital role in the overall performance and durability of the roof, contributing significantly to protecting the building from water damage and its associated problems.