I am still waiting for retrofit windows to call back, but they emailed me and they are not too far from my place in Crewe. When you are saying it costs about £600 per item to install, would that include doors or are they more work? I am trying to get around install costs at the moment and the below was so high. What would you think to consider for 2 windows and 3 doors on the ground floor? Thanks.
I posted some comment on install costs here I got quoted from Norrsken which make me a bit scared: Retrofit project planning starting with underfloor insulation - #24 by Christian_Unger