BI came round today and plaeased with the 3mx7m extension Im building so far. However he did say he wanted a Thermal calculation done because Im installing new Bi Fold Windows on the back wall which are 4.1m x 2.1m.
The lounge size will be approx 32sqm when completed.
He mentioned about calculating all the window/glazing areas and a 25% figure. Not too sure what he was on about and so I thought' well, there's more money for more calcs to be done'!
So, is it something I can do? Anyone care to help me and explain what the % of glass has to do with thermal calculations?
Please advise!
b
The lounge size will be approx 32sqm when completed.
He mentioned about calculating all the window/glazing areas and a 25% figure. Not too sure what he was on about and so I thought' well, there's more money for more calcs to be done'!
So, is it something I can do? Anyone care to help me and explain what the % of glass has to do with thermal calculations?
Please advise!
b