räystäät

Räystäät are the overhanging parts of a roof that project beyond the exterior walls. In Finnish and related architectural terminology, räystäät describe the eaves, the section of the roof that protects the wall from precipitation and can influence the overall appearance of a building. They are typically formed by extending the roof structure, such as the rafters, beyond the wall plane, with the outer edge finished by components like fascia boards or soffits.

The primary function of räystäät is to shed rain and meltwater away from the walls and foundations, helping to prevent water damage. They also provide shade to façades and can protect windows and doors from direct exposure to rain. In cold climates, properly designed eaves can aid in controlling ice dam formation by directing runoff away from the wall and openings. Eaves may accompany rain gutters to further manage water disposal.

Construction and design vary by style and climate. The length of the eave is a design choice that balances protection with aesthetics and structural loads. In timber construction, rafter tails may protrude visibly, creating an open eave, while closed eaves conceal the underside with soffits. Some designs use decorative brackets or corbels to support and ornament the overhang.

Materials and variants include wood, metal, and composite options for both the eave structure and soffits. Ventilated soffits help attic airflow and moisture control, while closed eaves offer a cleaner look and added weather resistance. Maintenance focuses on avoiding moisture intrusion, rot, and insect damage, and ensuring proper drainage and ventilation.

See also: eaves, soffit, fascia.