Outside the property

This document is only available with a paid isurv subscription.

Blown double glazing A modern, double-glazed unit consists of two sheets of glass with a seal around the edge, trapping a layer of air. This air acts as a form of insulation. When the seals fail, moisture-laden air can enter the gap between the two sheets of glass and severely reduce...

Explore the subscription options here to get full access to isurv, including downloads.

Try isurv for 1 month!

You can now get unlimited access to all isurv channels with our 1-month pass, available for only £39. To find out more, enquire with our team using our form.

Sign up for the isurv newsletter to receive a monthly round-up of the latest isurv updates.

For further support, please contact us by emailing isurv@rics.org or calling +44 (0) 247 686 8584