This system means the building is effectively wrapped in high performance insulation which maintains the structure at room temperature thereby eliminating cold bridge issues. In addition maximum thermal mass is maintained inside the insulation which will ensure a more even heating regime and allow storage of passive solar heat gain. External rendered insulation systems utilise polymer modified renders and the use of standard sand/cement renders are discouraged due to the inflexible nature of the render.
A typical insulated render system includes:
- The attachment of standard-size insulation boards to the existing wall using
- Mechanical fixings (sometimes accompanied by adhesive) through the wall
- Mesh reinforcement to form a key backing to the
- Render base coat
- Finish coat