Haven't seen the woodfibre stuff before. I used a product called Sisalwool made by a company down near Edinburgh which is made from a combination of sisal (the hairy rope stuff) and byproduct from the tweed industry. Great for friction fitting, none of the irritation of rockwool. There's also some place in Cumbria making it out of sheepswool.
@@StuffRobBuilt hi , first time I’ve used it myself but seeing it more on more on insta /youtube but mostly in jobs with bigger budgets I think , you need more of it to achieve the u-values etc but it’s nice to work with . I’ve seen adverts come up for that sisawool, algorithm is obviously watching 😆😆
Are there any long term issues with putting that insulation over bricks Bricks can hold on to moisture and just wondered if there could be an issue down the road. Thanks for sharing!
@@theislandbuilder I’m always amazed that the building industry doesn’t use sheep’s wool for insulation. I’ve read that farmers only get about 20p per fleece. Maybe wool is used but it’s expensive. I don’t know.
I’ve never used the sheep’s wool but did take it out of a renovation, I believe cost might be an issue but that might be outdated info but yeah it’s something we have an abundance of for sure !!
Looks like a job for a Festool insulation saw. How would you say the fitting time compares to standard PIR board? The Steico 100mm has a thermal conductivity of 0.038W/mK compared to Rockwool 100mm with a thermal conductivity of 0.035W/mK (still a bit off Celotex 100mm at 0.022W/mK). Rockwool is coming in at £9.90/m2 with Steico at £19.61/m2 so the client is really pushing the boat out on the spec. Are they going for an air tightness barrier before sheeting or keeping it open? Looking forward to the next installment :)
Hey , the customer / Architect are really focused on using as much Natural materials as possible so they are happy to make the trade of on the wood fibre not being as high a performer as celotex for example . Aye the festool saw is probably the boy for the job , used it on PIR before and liked it 👌 Fitting time I’d say this is quicker as the old rafters aren’t as straight as a new build would be so you’d be buggering about trimming bits and shaping them unless you push the boat out on gappo tape . Yeah there’s a VCL to be installed then a 2x1 batten for services and for the Douglas Fir lining boards to be fixed too 👍
@@theislandbuilder I’ve just done my loft with 300mm Sisalwool and used a tile cutting disc fitted to a angle grinder, worked really well and saved a lot of elbow grease cutting the 100mm batts
@@theislandbuilder Not that bad, some loose fibres and wool but not as bad as the rock wool and the fibreglass insulation I was removing which was awful. It’s not cheap but definitely better and makes the room quieter from the roof, the moisture level is going down a bit too, Next year I’m going to insulate interior walls with wood fibre and then aerogel lime plaster
Watch us have a first go at wood fibre insulation.
Haven't seen the woodfibre stuff before. I used a product called Sisalwool made by a company down near Edinburgh which is made from a combination of sisal (the hairy rope stuff) and byproduct from the tweed industry. Great for friction fitting, none of the irritation of rockwool. There's also some place in Cumbria making it out of sheepswool.
@@StuffRobBuilt hi , first time I’ve used it myself but seeing it more on more on insta /youtube but mostly in jobs with bigger budgets I think , you need more of it to achieve the u-values etc but it’s nice to work with . I’ve seen adverts come up for that sisawool, algorithm is obviously watching 😆😆
Are there any long term issues with putting that insulation over bricks Bricks can hold on to moisture and just wondered if there could be an issue down the road. Thanks for sharing!
Woodfibre insulation is very good with moisture management since it’s vapour-open! 😊 planning to use this too!
A brilliant way to store carbon for hundreds of years.
Great job Sandy.
I hope that wasn’t a Stanley zombie knife that you have?
Only joking. All the best from Burghead.
Michael
We are in the Wild West here so need to be careful 😂
@@theislandbuilder I’m always amazed that the building industry doesn’t use sheep’s wool for insulation. I’ve read that farmers only get about 20p per fleece. Maybe wool is used but it’s expensive. I don’t know.
I’ve never used the sheep’s wool but did take it out of a renovation, I believe cost might be an issue but that might be outdated info but yeah it’s something we have an abundance of for sure !!
Looks like a job for a Festool insulation saw. How would you say the fitting time compares to standard PIR board? The Steico 100mm has a thermal conductivity of 0.038W/mK compared to Rockwool 100mm with a thermal conductivity of 0.035W/mK (still a bit off Celotex 100mm at 0.022W/mK). Rockwool is coming in at £9.90/m2 with Steico at £19.61/m2 so the client is really pushing the boat out on the spec. Are they going for an air tightness barrier before sheeting or keeping it open? Looking forward to the next installment :)
Hey , the customer / Architect are really focused on using as much Natural materials as possible so they are happy to make the trade of on the wood fibre not being as high a performer as celotex for example .
Aye the festool saw is probably the boy for the job , used it on PIR before and liked it 👌
Fitting time I’d say this is quicker as the old rafters aren’t as straight as a new build would be so you’d be buggering about trimming bits and shaping them unless you push the boat out on gappo tape .
Yeah there’s a VCL to be installed then a 2x1 batten for services and for the Douglas Fir lining boards to be fixed too 👍
@@theislandbuilder I’ve just done my loft with 300mm Sisalwool and used a tile cutting disc fitted to a angle grinder, worked really well and saved a lot of elbow grease cutting the 100mm batts
@ good idea , was it dusty ? .
I’ve seen 200mm kingspan cut with an electric chainsaw before ,wouldn’t recommend that one though 🫣🫣🤣
@@theislandbuilder Not that bad, some loose fibres and wool but not as bad as the rock wool and the fibreglass insulation I was removing which was awful. It’s not cheap but definitely better and makes the room quieter from the roof, the moisture level is going down a bit too, Next year I’m going to insulate interior walls with wood fibre and then aerogel lime plaster