is solid wall insulation?
Houses built before 1930 and some in later years typically have solid masonry walls. Heat loss through the external walls is on average 35%. Solid wall insulation is a way of preventing energy waste and cutting up to 25% of the fuel bills. In addition to its weatherproofing benefits, where the building fabric of older houses is in a poor state of repair, solid wall insulation can deal with both the structural and aesthetic issues.
wall insulation is generally a composite system made up of three basic
layers – an insulant, a fixing, and a protective, decorative finish.
The two main types of solid wall insulation are external and internal. The typical U-values of 2.10 W/m2K can be reduced up to 0.30 W/m2K.
External wall insulation
The design and installation of external wall insulation is a specialist job. It is strongly recommended to use certified materials and components. The typical method includes attaching standard size insulation boards to the wall and finishing with a reinforced render or cladding. The boards are between 40-90 mm thick, fixed to the wall with adhesive and mechanical fixings. The total thickness of the insulation is 50mm to 150mm. For most cost-effective results this should be done as part of other renovation work.
Also referred to as dry-lining, this type of insulation involves applying a 25-50 mm insulation layer on the inside of external walls covered with plasterboard fixed with adhesive and possibly metal fasteners. The thickness is 40mm -100mm.
The Oxford Solar Initiative (OSI) has secured financial incentives for properties in Oxford:
The following fixed grants are available for both internal and external type of solid wall insulation through London Energy:
The figures are based on gas central heated properties. The grant will depend on the U value achieved.
Additionally the Oxford Solar Initiative offers £500 cash back for any full property external solid wall insulation
What are the benefits of solid wall insulation?
information on products and installers:
- Insulated Render and Cladding Association (INCA) Ltd., Surrey, tel: 01428 654011; fax: 01428 651401; web site: www.inca-ltd.org.uk
- Celotex Litd., Suffolk, tel: 01473 822 093; fax: 01473 820 880; web site: www.celotex.co.uk
- PermaRock Products Ltd., Leicestershire; tel: 01509 262924; fax: 01509 230063; web site: www.permarock.com