how much would a 4m aluminium bifold cost to be installed in UK, (Cambridgshire area) but a general cost would be great To include -planning permission structural engineering calcs -New RSJ -supply and fit -labour -waste removal
The company you buy the doors from, they generally like to install them for your warranty.
That company will not do your planning permission, or make the opening and install rsj.
You probably can get a company that will do the lot for you, but that wouldnt be the norm.
A builder will do the opening and create space for the doors, and the size of space will be agreed on with the company. The company that we bought our doors from wanted the space opened first then they made the doors to fit the space, that way there is no error.
Some builders do have someone who can do the planning application but many don't.
We got a designer to draw the plans for planning permission, we had a structural engineer to create the calculations for the sizes of beams etc needed and this went to planning too. The builder created the opening and installed beam, then the door company came out to install the doors.
So, 4 different services.
Our doors are 3.4m wide - cost £4500 including installation.
Our builder created the opening and installed the rsj as part of a big renovation so I cannot give a rough number for that part - prob £1500-£2000?
Planning application and structural drawings - together about £1000?
6 weeks was the timeframe. The opening/Rsj was the first thing the builders done. It was all boarded up, but we also blocked off that room completely from the rest of the house so we had no draughts or anything.
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Ellie
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