KernowGran

Thanks, that's helpful. I'm tending to the 2 sliders & fixed middle. Hi Lizzie, Thanks for your response - I've read some of your posts & they've been helpful, thank you. Yes a linnhay/linney is a cart shed or hay barn, ours is attached to the house so will be a 'garden room' aka conservatory, but with a proper roof. The whole length is 8m & the posts support a lintel on the open side. It's stone built & a lovely space. The glazing will be inside (behind the posts) so as to be less obvious. I think you're right about Internorm being the go-to place for large panes. I'm planning Kingspan to the vaulted roof. I'm undecided about 3g or 2g at present - probably 2g as this isn't the main living area but depends on costs, U values etc.

Hi Craig, Thanks for your reply. There may be a little confusion about my use of 'bay'. It's a straight 8 m opening a bit like a wide car port, with two oak posts at 1/3, 2/3 along dividing it into 3 roughly equal 'windows'. Architect has suggested that all three doors slide but I think that will be expensive but I don't know. He has suggested Internorm, too. I just wanted to look at alternative suppliers so I've looked at Rationel. Someone mentioned European suppliers - names would be welcome.

You're right, it depends on the officers. I am 'watching' an enforcement notice locally for uPVC windows to be removed & original wooden reinstated.

Thanks, they seem to vary a great deal. I haven't yet met one that will allow uPVC on a listed building.

Hi, have just joined this forum & I realise this thread is now over a year old but my project is just starting. I've read all the comments & they are so useful, thank you. I'm renovating a Grade 2 listed house & hope to get permission to glaze a 3-bay linhay so all comments about sliding doors & suppliers most welcome. Overall length 8 metres, height 2.05m. In your experience, if one bay is fixed glass, does that make it cheaper? I find suppliers are a bit coy about giving even a ballpark figure. Don't think the Conservation Officer will allow any uPVC, I'm happy with aluminium.