The core activity of Holz und Huus GmbH is the provision of services in the field of "building envelopes", particularly: construction and renovation of pitched and flat roofs; cladding, insulation and renovation of facades; calculation, construction and installation of solar systems; carpentry, including specialized carpentry, firewood and sawmill services; demolition and disposal; and craft work and repairs. The company thus offers a comprehensive range of services for the construction, renovation and maintenance of building envelopes.