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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Wall material between dormer room and attic spaces
Anyone know if in England, such a wall needs to be predominantly fire
resistant? Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. It's one dormer room, about 2/3rds of the roof space, on top of a single storey bungalow (so the dormer is the first floor) and only one room up there, a sitting room. So this ply would be the primary layer between room and attic. Cheers for any thoughts... Tim |
#2
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Wall material between dormer room and attic spaces
Tim Watts wrote:
Anyone know if in England, such a wall needs to be predominantly fire resistant? Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. It's one dormer room, about 2/3rds of the roof space, on top of a single storey bungalow (so the dormer is the first floor) and only one room up there, a sitting room. So this ply would be the primary layer between room and attic. Cheers for any thoughts... Tim The only loft fire resistance need that comes to mind is between lofts of semi detached or terraced properties. I can't think of a need in a detached property. I certainly did not have to add any when I did my loft conversion in the 1980s $ dormers and 4 storage areas into the loft space. I don't know if you have a warm or cold roof but pay attention to insulation/ventilation needs |
#3
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Wall material between dormer room and attic spaces
On 16/03/16 17:39, Tim Watts wrote:
Anyone know if in England, such a wall needs to be predominantly fire resistant? I dont think so but you WILL need smoke alatrms. Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. worst case use masterboard behind the wood planks, if you need a fire barrier. It's one dormer room, about 2/3rds of the roof space, on top of a single storey bungalow (so the dormer is the first floor) and only one room up there, a sitting room. So this ply would be the primary layer between room and attic. Cheers for any thoughts... Tim -- A lie can travel halfway around the world while the truth is putting on its shoes. |
#4
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Wall material between dormer room and attic spaces
On 16/03/16 17:51, Bob Minchin wrote:
Tim The only loft fire resistance need that comes to mind is between lofts of semi detached or terraced properties. Seems reasonable - thank you. The only thing that I wondered about is mounting sockets in this panelling (in the non removable parts). But having checked, I cannot find anything prohibiting that. I was wondering to upgrade to fire resistant ply, but it's not that easy to get - we'll be needing a fairly good quality ply to route grooves in. I can't think of a need in a detached property. I certainly did not have to add any when I did my loft conversion in the 1980s $ dormers and 4 storage areas into the loft space. I don't know if you have a warm or cold roof but pay attention to insulation/ventilation needs Indeed - the BCO was involved there and we've done everything required (tyvek under the tiles, 25mm air gap, 3" celotex between rafters and added new proper vents bother ends of the flat roof so the deck is ventilated (50mm gap between deck and celotex as BCO specified). The remaining 25mm/50mm layer of celotex will bring everything to around 100mm total and act as the final vapour barrier between the roof structure (which is cold) and the dwelling space. |
#5
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Wall material between dormer room and attic spaces
On 16/03/16 17:53, The Natural Philosopher wrote:
On 16/03/16 17:39, Tim Watts wrote: Anyone know if in England, such a wall needs to be predominantly fire resistant? I dont think so but you WILL need smoke alatrms. Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. worst case use masterboard behind the wood planks, if you need a fire barrier. That is not a bad idea at all... Could bond a thinner ply to the surface to route grooves into. |
#6
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Wall material between dormer room and attic spaces
In message , Tim Watts
writes Anyone know if in England, such a wall needs to be predominantly fire resistant? Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. It's one dormer room, about 2/3rds of the roof space, on top of a single storey bungalow (so the dormer is the first floor) and only one room up there, a sitting room. So this ply would be the primary layer between room and attic. Cheers for any thoughts... There's this stuff http://www.winwood-products.com/eng/.../fire-retardan t-plywood.htm You can purchase paint on intumescent products but I don't know if they do a clear lacquer or how child/pet friendly it might be. Our builders *fireproofed* a supporting steel with 18mm pine board Hilti gunned on. (20 years ago) -- Tim Lamb |
#7
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Wall material between dormer room and attic spaces
In message , Tim Watts
writes On 16/03/16 17:53, The Natural Philosopher wrote: worst case use masterboard behind the wood planks, if you need a fire barrier. That is not a bad idea at all... Could bond a thinner ply to the surface to route grooves into. I've seen grooved ply used as a wall decoration so you can probably buy it ready to nail up. -- Tim Lamb |
#8
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Wall material between dormer room and attic spaces
Tim Watts wrote:
On 16/03/16 17:53, The Natural Philosopher wrote: On 16/03/16 17:39, Tim Watts wrote: Anyone know if in England, such a wall needs to be predominantly fire resistant? I dont think so but you WILL need smoke alatrms. Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. worst case use masterboard behind the wood planks, if you need a fire barrier. That is not a bad idea at all... Could bond a thinner ply to the surface to route grooves into. IIRC you can buy ply cladding(thin) with the grooves already cut. |
#9
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Wall material between dormer room and attic spaces
"Tim Watts" wrote in message
... The only thing that I wondered about is mounting sockets in this panelling (in the non removable parts). But having checked, I cannot find anything prohibiting that. You can always fit intumescent back boxes if it bothers you or indeed fit a intumescent gasket to a normal box They are not that expensive and also act as acoustic barriers if needed. -- Adam |
#10
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Wall material between dormer room and attic spaces
On 16/03/16 18:18, Tim Lamb wrote:
There's this stuff http://www.winwood-products.com/eng/.../fire-retardan t-plywood.htm I have been considering that - not cheap. But Euroclass B seems to be equivalent to painted plasterboard for ability to hold back a fire. You can purchase paint on intumescent products but I don't know if they do a clear lacquer or how child/pet friendly it might be. I've also come across a link to one of those too - amazing stuff. Used in Stately Homes: http://envirograf.com/product/intume...-for-wood-etc/ Our builders *fireproofed* a supporting steel with 18mm pine board Hilti gunned on. (20 years ago) |
#11
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Wall material between dormer room and attic spaces
On 16/03/16 18:32, Capitol wrote:
Tim Watts wrote: On 16/03/16 17:53, The Natural Philosopher wrote: On 16/03/16 17:39, Tim Watts wrote: Anyone know if in England, such a wall needs to be predominantly fire resistant? I dont think so but you WILL need smoke alatrms. Stripping out the plasterboard now, to get more celotex on the underside of the roof. However, I'm interested in the idea of running 3' high 18mm plywood around the entire room, routed with grooves to look like plank panelling. Some sections would be removable and we'd make some secret doors for access to the loft voids. Before I go and bother the BCO, I'd like to check out some ideas so I can go with a plan likely to meet approval. worst case use masterboard behind the wood planks, if you need a fire barrier. That is not a bad idea at all... Could bond a thinner ply to the surface to route grooves into. IIRC you can buy ply cladding(thin) with the grooves already cut. I've seen MDF, not ply - wonder who sells it? |
#12
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Wall material between dormer room and attic spaces
On 16/03/16 19:02, ARW wrote:
"Tim Watts" wrote in message ... The only thing that I wondered about is mounting sockets in this panelling (in the non removable parts). But having checked, I cannot find anything prohibiting that. You can always fit intumescent back boxes if it bothers you or indeed fit a intumescent gasket to a normal box They are not that expensive and also act as acoustic barriers if needed. £3 at TLC for the metal intumescent box - you're right, not expensive for a very few that are needed. |
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