climbinggeorge Posted November 18, 2021 Share Posted November 18, 2021 Trying to get this straight in my head before calling back the carpenter. We have 2040x826mm fire doors downstairs, we have just boarded and plastered them in place, the photo is from a few days ago. The spacing in the studwork is 910mm The door linings (supplied by me) are 42mm This should leave space for an 826mm wide door, the fireproof strips are within the door frame not the actual door. However after packing out (and foam filled by oblivious me) there is now only around 800mm space. The official guide to the doors suggest they can be trimmed by 3mm each side which means I have another 20mm or so to find. I think the way forward is to carefully cut this into the lining until the door can fit, have I missed anything or is this the logical step? Or is this normal and when I ask the carpenter about hanging the doors he would do this as a normal step. NB These are metric doors, the next size down is 726mm and we've already bought the doors so I'd really like to make them fit Link to comment Share on other sites More sharing options...
ProDave Posted November 18, 2021 Share Posted November 18, 2021 No you need to take the liners out of the wall and start again. 826+42+42 =910 so it will just fit with the liners tight to the frame with no spacers, and that hopes the frame is square and true. When I fitted mine, i made a gauge just by cutting a spare bit of wood to 826mm long and ensured that fitted between the two sides of the door liner. Link to comment Share on other sites More sharing options...
Dave Jones Posted November 19, 2021 Share Posted November 19, 2021 (edited) yep rip that lot out and maybe use mdf liner to give more room. They also look better without all the knots. pointless foaming also, save your cash. Could that mess hanging out the ceiling not be moved into the stud by moving it forward a tad and a bit wider ? Edited November 19, 2021 by Dave Jones Link to comment Share on other sites More sharing options...
Nickfromwales Posted November 19, 2021 Share Posted November 19, 2021 19 minutes ago, Dave Jones said: pointless foaming also, save your cash. 14 hours ago, climbinggeorge said: We have 2040x826mm fire doors downstairs, Fire doors Do NOT fail to install the intumescent foam. 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted November 19, 2021 Share Posted November 19, 2021 +1 to linings coming out. Who fitted them, and did they receive instructions to install to the required openings? Link to comment Share on other sites More sharing options...
climbinggeorge Posted November 19, 2021 Author Share Posted November 19, 2021 Thanks all, guess they are coming out. I gave the linings and required door dimensions to the carpenter, although he never invoiced me so maybe this is why he went a bit quiet Link to comment Share on other sites More sharing options...
Nickfromwales Posted November 19, 2021 Share Posted November 19, 2021 Gaps around the lining need the intumescent foam. Small gaps which you can’t foam can be sealed with intumescent acrylic sealant. Link to comment Share on other sites More sharing options...
climbinggeorge Posted November 19, 2021 Author Share Posted November 19, 2021 I filled with foam, cut the foam back then it had the sealant on top and filling in any extra But for the main issue, it turns out the adage about measuring twice is very relevant. I think I may have measured between the door jambs I suspect, but on a careful recheck I've actually got 833mm to play with. A little embarrassing but if that's the only mistake I'll take that Link to comment Share on other sites More sharing options...
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