Upgrading the thermal insulation of a building

Initially a choice needs to be made regarding where to position additional insulation in the structure.

Common issues and queries you can face

Internally upgrading insulation – issues

Internally

Insulation here encroaches on the usable space and causes major disruption to tenants in refurbishment situations. It does not address cold bridging where floors are supported on the external walls. There is a high risk of condensation at these locations as a result. The main external envelope ends up considerably colder than before and as a consequence is vulnerable to freeze thaw degradation.

Updating cavity insulation – issues

In the cavity

Popular over the years, cavity insulation is limited due to available space. The external leaf ends up considerably colder than before and therefore vulnerable to freeze thaw degradation. It does not address cold bridging where floors are supported on the external walls. There is a high risk of condensation at these locations as a result. Fully filled cavities may provide a bridge that carries moisture between the wet external and dry internal leaves that wets the insulation and turns it, contrary to purpose, into a very effective cold bridge.

Use External Wall Insulation (EWI) System

External wall insulation arguably provides the technically best option for upgrading thermal insulation in existing construction and for simplifying new construction.

Contact us

Rendering over existing render is a last resort, and we recommend discussing alternatives and suitability with our technical team prior to taking action. Our technical team can be contacted by:

Our technical team is available Monday to Friday, 8:30am until 5.00pm.

Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk

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