External wall insulation Nw4 London
Expanded polystyrene and mineral wool are the two most commonly used materials for insulation work on external walls. Extruded polystyrene (XPS) is also used in situations where the wall is going to be exposed to more water than usual (below the DPC for example).
This refers to both the base coat with reinforcement mesh, the primer and the top coat. In some systems a paint will also be specified.
There are many laws which relate to building work and even more guidelines, but here we are specifically looking at best practice which affect the installation of ETICS. We have broken the requirements down into several categories.
- The work must be designed and installed in a way that mitigates against: the collapse of the works, causing any major deformations, causing damage to other parts of the installation or the building itself, damage to the system disproportionately larger than the cause of the damage.
- The installation must comply with fire regulations.
- The works must not be a threat to the hygiene or health of anyone – both the occupants and the neighbours of the building in question.
- The site must be safe to work on, accounting for risks such as falls, electrocutions, burns etc.
- The works should try to mitigate excessive noise, and where noise is unavoidable, reduce the impact.
- The works should look to limit the amount of energy used where possible but also account for the needs of the workers and those affected by the property.
A good installer should try to account for all of the above in planning and executing the installation of the insulation
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