Building a large back extension on my own, on a building notice and without too much background in construction. So I was always going to run in to things I didn't know yet... .
Had Building Control out the other day and he gave me a formula to calculate the ratio of windows and doors I would have in the new extension.
Even though I'm working to a very rough plan, that can be changed as I go... I was planning on adding in 5.5m long bi-fold or sliding doors, and two 1.5m by 3.5m roof lanterns.
In short, I'm likely to go over my allowance. BCO said I might be able to get away with it if I change the boiler, which I'm planning to do anyway. Just trying to figure out how these calculations work and if I can do them myself?
I.e: changing the boiler to a new A-rated model will allow me to add an additional X square meters of glass.
Had Building Control out the other day and he gave me a formula to calculate the ratio of windows and doors I would have in the new extension.
Code:
Extension in m²/4 + existing openings that are to be covered up in m²
Even though I'm working to a very rough plan, that can be changed as I go... I was planning on adding in 5.5m long bi-fold or sliding doors, and two 1.5m by 3.5m roof lanterns.
In short, I'm likely to go over my allowance. BCO said I might be able to get away with it if I change the boiler, which I'm planning to do anyway. Just trying to figure out how these calculations work and if I can do them myself?
I.e: changing the boiler to a new A-rated model will allow me to add an additional X square meters of glass.