Building Insulation

There are many types of products that provide thermal and acoustic insulation to the fabric of a building. The choice of material depends upon application – roof/wall/floor and the performance required.

There are four generic types:

  • Man Made Mineral Fibre – Glass Wool and Stone Wool
  • Foil-Faced Foam Boards
  • Expanded and Extruded Polystyrene
  • Multi Foils

Man-made mineral fibre (MMMF) embraces both glass wool and stone wool. It is used in roof, wall, and floor applications within masonry, timber and steel frame construction for thermal, acoustic, and fire protection insulation.

PIR and Phenolic boards are used widely for thermal insulation in construction. For roof, walls and floors their low (good) thermal conductivity provides high levels of insulation with reduced thickness.

Manufacturers meet performance specifications that are broadly similar.

There are two grades of Polystyrene used in the construction industry: Expanded – EPS and Extruded - XPS

Extruded polystyrene (XPS) has a high compressive strenth, which makes it idea for load bearing applications in roofing and flooring.

Multi Foil insulation is made up of multi-layered reflective films separated by thin foam, which are then stitched together to form an insulating blanket.

The main use is attic insulation during loft conversion but it also has applications in floor and wall construction. In pitched roof applications Multi Foils are used with other insulants to meet building regulation performance.

Having been widely used in mainland Europe for a number of years they are now widely used in the UK since performance and certification issues have now been resolved.