External wall insulation involves fixing a layer of insulation material to the wall, then covering it with a reinforcement and a modern thin-coat render. The finish is usually a textured render, pebble-dash, brick slip or a brick effect render finish could be used.
These finishes can be used alone, or in a combination so that considerable variety in the appearance of the treated wall can be achieved.
Key Points – External Wall Insulation:
- Can save approx. £435* per property per year (Detached house – source: Energy Savings Trust)
- Can save approx.1.8 tonnes* of carbon dioxide per year (source: Energy Savings Trust)
- Can be applied with minimal disruption to the household and its occupants
- No internal access is required
- Does not reduce the floor area (living space) of the property
- Improves the appearance of the property – potentially increasing the property’s value
- Improves weatherproofing and sound resistance
- Will make the building more airtight, reducing heat loss (Need to ensure building has sufficient natural and mechanical ventilation)
- Reduces the risk of condensation
* based on insulating a gas-heated, detached home (source: Energy Savings Trust)