The architect Elke Kirst works for the Munich architectural office hirner & riehl architekten und stadtplaner. In this interview she explains facts and figures about the special roof of Haus St. Wunibald.
𝙒𝙝𝙖𝙩 𝙢𝙖𝙩𝙚𝙧𝙞𝙖𝙡 𝙞𝙨 𝙩𝙝𝙚 𝙧𝙤𝙤𝙛 𝙢𝙖𝙙𝙚 𝙤𝙛?
A stainless steel roof in double standing seam covering was chosen (FinoTex product from Rimex Metals).
𝙒𝙝𝙖𝙩 𝙞𝙨 𝙩𝙝𝙚 𝙨𝙞𝙯𝙚 𝙖𝙣𝙙 𝙨𝙡𝙤𝙥𝙚 𝙤𝙛 𝙩𝙝𝙚 𝙧𝙤𝙤𝙛?
The roof has a total area of 640 m2 and a slope of 7%/ 4°.
𝙒𝙝𝙮 𝙬𝙖𝙨 𝙘𝙝𝙤𝙨𝙚𝙣 𝙖 𝙩𝙞𝙣 𝙧𝙤𝙤𝙛?
The new building was intended to blend into the background of the historic monastery complex and not exceed it in height. Therefore, in contrast to the existing pitched roofs, a building with a low-pitched roof was proposed. Cladding with the existing plain tiles is not possible with this low roof pitch, so a double standing seam stainless steel roof was chosen.
𝙒𝙖𝙨 𝙩𝙝𝙚𝙧𝙚 𝙖𝙣𝙮𝙩𝙝𝙞𝙣𝙜 𝙩𝙤 𝙘𝙤𝙣𝙨𝙞𝙙𝙚𝙧 𝙧𝙚𝙜𝙖𝙧𝙙𝙞𝙣𝙜 𝙩𝙝𝙚 𝙨𝙩𝙧𝙖𝙬 𝙘𝙤𝙣𝙨𝙩𝙧𝙪𝙘𝙩𝙞𝙤𝙣
𝙬𝙝𝙚𝙣 𝙮𝙤𝙪 𝙗𝙪𝙞𝙡𝙩 𝙩𝙝𝙚 𝙧𝙤𝙤𝙛?
The roof is designed as a cold roof with a straw-insulated floor slab and a raised rafter roof to create the roof pitch.
Fire protection requires that the room partitions below either extend directly below the roof skin or that a room-enclosing fire-retardant finish be constructed. In order to achieve fire resistance class REI30, the straw-insulated construction was clad on the underside in two layers (OSB and GKFI board) and the room partitions were connected to it.
Photos: Lorenz Märtl