Ask an expert: Why has my home's BER dropped?

Sometimes, the rules of the game change

Lots of homeowners have had their BER (Building Energy Rating) change over time, even when they haven’t modified the house.

Dear Brigid,

I had an examiner at my house to renew my BER. The house is 10 years old and the BER is A2. He said it may drop to B1. How can this be justified if I made no changes to the house? I’ve heard of other people having similar issues with their BER rating. Is the system working properly? If not, what are the main issues and how can they be addressed?