Weight: Because they use heavy timber, insulation materials and tiles, clad over solutions are often too heavy for existing conservatory frames. Any new roof for an old conservatory must be lightweight, with the lightest solid roof systems weighing around 31KG/M ².
Tip: Always ask your installer for the total unit weight of the new roof per Sq.M
Fire Safety: A ‘clad-over’ system does not comply with fire safety regulations as it hasn’t been sufficiently fire tested as a complete roof structure, which is essential for meeting the relevant part of building regulations. The original structure varies from job to job which means that only individual components may have been tested. Solid roofs must be classified as AC, AB or AA in accordance with BS476-3.
Tip: Ask to see the fire safety certificate of the entire roof system before you commit to the project.
Building Regulations: It’s very rare that a clad over system receives Building Regulations Approval because of its low thermal value or structural integrity. Please note that planning permission is an entirely different thing to building regulations approval. When making any kind of change to a structure, including replacing a glass or polycarbonate conservatory roof with a solid roof), Building Control must be notified first.
Tip: Check that local Building Control has been informed before the conversion starts. Obtain a Building Regulations ‘Final’ Certificate and file it in a safe place.