Skellerup Roofing and Waterproofing opened its doors for business in 1967, manufacturing Skellerup Butylclad waterproofing membrane at its Christchurch plant. Having kept New Zealand and South Pacific folk dry for 4 decades, we are now a part of the Tiri Group, (and branded as "Viking Roofspec") The Tiri Group comprises of a diverse group of manufacturing and distribution businesses which are owned and operated in New Zealand.