According to the Planning and Building Act, a construction product may be included in a building only if the product is suitable for its intended use. A type-approved product is verified to fulfil the requirements of the building regulations. Today, prefabricated underlayment shutters are one of the most common underlayments in roofing and there is a type approval for them. Now the type approval has been updated and clarified with a new rule for certification.
Roofing with rafters provides a stable base for roofing with roofing felt, tiles and sheet metal. The use of prefabricated underlayment shutters allows for faster roofing. The unprotected roof surface and building are exposed to climate and external influences for a shorter time, reducing the risk of future problems in the finished building. Prefabricated underlay shutters produced in a controlled production environment provide the conditions for consistently high quality.
A type approval for the manufacture of underlayment shutters allows you to demonstrate that the product has been manufactured under controlled conditions and fulfils the requirements for its intended use, giving you a competitive advantage. The certification rule for a product describes the certification process when applying for a type approval, the requirements, checks and labelling to be done for the product. To minimise the risk of different interpretations, the certification rule for the type approval of underlay shutters was updated in September 2023.
Type approval of manufactured products is done by an authorised independent party. Boverket has appointed RISE as a competent organisation to issue type approval for construction products and accredited by Swedac for it. Type approval of underlay shutters is unique in the market and RISE is the only organisation that can issue type approval, perform accredited inspection and offer accredited testing of all the properties included in the certification rule for underlay shutters.
RISE develops certification rules for type approvals and certifies product type approvals.
When RISE develops new rules for type approval, we start from the rules and regulations developed by authorities, in this case the Swedish National Board of Housing, Building and Planning, and RISE's long experience of testing and type approval of products in the field. When you then hire RISE to issue a type approval for your product, you can be sure that an issued type approval maintains a high level and that the type-approved products meet the requirements of the building regulations. Type approval is carried out according to the certification rule through testing and review that ensures that materials, function and documentation have the conditions to fulfil, such as for underlayment shutters, applicable requirements for durability, moisture and roof safety.
This is an article from our magazine Trävärden, view it here! (Link)