Maintaining My Home

damage to roof glazing (skylights) can potentially affect the weathertightness of a home and also lead to significant heat loss, so it should not be ignored

if the cracking is extremely minor and no air or water is passing through the crack, keeping a watchful eye on it may be an acceptable approach in the short term.

if the cracking is more than minor, then the damaged glazing should be replaced. Consult a skylight supplier or glazier ¬ repairing and replacing roof glazing is not DIY work

only use well experienced people. Problems with double glazing/skylights are commonly the result of faulty installation

roof glazing must meet the requirements of NZS 4223.4:2008 Glazing in buildings Part 4: Wind, dead, snow and live actions, which requires the use of safety glass. The safety requirements of working at height must also be followed

under the Building Code, skylights being newly installed or replaced must have a certain minimum “R-value” – this is a measure of the way they stop heat being lost from a building. The higher the R-value, the lower the heat loss

two ways to demonstrate compliance with the Building Code are Acceptable Solution H1/AS1 5th edition amendment 1 or Verification Method H1/VM1 5th edition amendment 1