I've ordered this today for ceilings and internal stud walls and got a competitive price. 57 packs, free delivery at £13.16 ex vat per pack.

 

From here:

Condell Ltd

Makes me itch just thinking about it!

It was one of the worst jobs in the build, stuffing that into the ceiling void.  I wore a Tyvek suit, with the hood up and a mask on, plus I taped around the glove/sleeve joint and around my ankles, but the damned stuff still got in...

I can't say I'm looking forward to it, but has to be done. I may wear my beekeeping suit!

I used Rockwool RWA6 which are batts or slabs, as EWI on my build. I assume RWA45 are also batts which are resin bonded, fairly rigid and easy to cut and work with.

obviously i'm the thick cousin on this forum, but i didn't think rockwool was itchy. I thought it was only fibreglass insulation that made people itch????

2 minutes ago, Big Neil said:

obviously i'm the thick cousin on this forum, but i didn't think rockwool was itchy. I thought it was only fibreglass insulation that made people itch????

 

Does that mean I can't wear my beekeeping suit?

my god there are bees in it - what are rockwool doing - that's disgusting treatment of animals. I bloody hope they don't claim to be vegan free!!!

@Big Neil I think your right, we used rockwall and it’s nothing like fibreglass insulation.

Rockwool is however full of dust so you do need good masks. 

...so why the dressing up like a super-gimp as described by Mr Harris. have I missed something?

10 minutes ago, Big Neil said:

...so why the dressing up like a super-gimp as described by Mr Harris. have I missed something?

I don't think you've missed anything. There is a lot of difference between Rockwool rolls and Rockwool slabs. It isn't possible to stuff RWA slabs into small areas as they are rigid. I fitted a lot of RWA6 slabs without wearing any protection and without any problems.

 

https://www.ribaproductselector.com/Product.aspx?ci=6375&pr=Rockwool-ROCKWOOLInsulationSlabsRWA45RW3-RW4-RW5-RW6

Edited December 12, 20187 yr by PeterStarck
Added link.

Sorry to change the subject slightly, but I wonder why anyone has not considered using blown cellulose in interior walls. I visited a lovely Touchwood build in Suffolk recently that will do exactly that. Is it a matter of cost I wonder? Or perhaps the concern of the circular holes required? Any thoughts?

Edited December 12, 20187 yr by Dreadnaught

One of the reasons may be the lack of rentable machines to blow it in unlike the USA, for us DIY merchants!

When the cellulose was put into my house recently, Gordon, the guy who did the job, commented about the lack of fluffer-upper machines in the UK and Europe. His was imported from the US.

 

Perhaps the other thing is the need to seal the walls. Having seen how easily the cellulose escapes from the smallest of gaps when blown under pressure, I imagine it could be difficult to install in interior walls, especially once services are embedded into them.

Edited December 12, 20187 yr by vivienz

I like the look of wet cellulose, sprayed onto the walls a bit like sprayed foam, then scraped flat and plasterboarded afterwards. What machines do they need?