Filling a cavity wall involves injecting insulation material into the space between the inner and outer walls of a building to improve energy efficiency. This is typically done by professionals using specialized equipment. Here's a breakdown of the process:
The Injection Process
-
Drilling Holes: A specialist company will drill a series of small holes in the exterior walls of your home. These holes are strategically placed to ensure complete coverage of the cavity.
-
Insulation Injection: Using specialized equipment, the chosen insulation material is injected into the cavity through the drilled holes. The materials commonly used include:
- Mineral Wool: A fibrous material made from molten glass, rock, or slag.
- Polystyrene Beads: Small, lightweight plastic beads.
- Polyurethane Foam: A spray foam insulation that expands to fill the cavity.
-
Hole Sealing: After the insulation is injected, the drilled holes are sealed with cement or a matching mortar to restore the appearance of the wall.
Considerations
- Professional Installation: Due to the specialized equipment and knowledge required, cavity wall insulation should always be installed by qualified professionals.
- Material Choice: The best insulation material for your cavity wall depends on factors such as your climate, budget, and the existing construction of your home. Discuss your options with the installer.
- Suitability: Not all walls are suitable for cavity wall insulation. An assessment of the wall's condition and the width of the cavity is necessary before installation.
Summary
In short, filling a cavity wall is a process that involves drilling holes in the exterior wall, injecting insulation material through these holes, and then sealing the holes. It is best left to professionals to ensure proper installation and effectiveness.
