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Price of RW3 Rockwool...

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Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 1:57 pm
by Logarhythm
blinddrew wrote:Just under 16kg for the pack so about 35kg/m3.
Not enough irritatingly. Will give Jewson a call on monday but not sure if they sell direct to the public?
Ho hum. Didn't expect this to be easy but thought this bit might be a bit easier! :)

Jewsons definitely do - I cycle past the Exeter branch most days, and they have an enormous sign hung on their fence advertising exactly this.

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 4:36 pm
by blinddrew
Cheers, will give them a call tomorrow. Should be getting a quote from Selco as well.

P.S. Wonks, I'm ignoring that... ;)

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 4:41 pm
by Hugh Robjohns
The density of RW3 is 60kg/m3 whereas RWA45 is 45kg/m3. Both are available in various thicknesses from 25 to 100mm and the sheets are generally all 600/1200mm wide/long. Both are class A1 non-combustible, of course.

It's frustrating, but understandable that most building suppliers insist on selling pallet loads, which is a lot of rockwool! And shipping will always be pricey because it is both bulky and heavy... But you can always put the left-overs in the loft! ;-)

For the Studio SOS jobs we generally use Rockwool Sound Insulation Slab packs from Wickes just because it's always in stock and can be bought in small quantities of one or two packs etc...but I'm not sure of its density to be honest... and the website doesn't seem to say.

H

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 4:55 pm
by Sam Spoons
blinddrew wrote:Just under 16kg for the pack so about 35kg/m3.
Not enough irritatingly.

Drew is referring to Rockwool Sound Insulation Slabs https://www.selcobw.com/products/insulation/acoustic-insulation/rockwool-sound-insulation-slab-1200-x-600-x-50mm-8-64m

Maybe we get a little too anal about the specifics sometimes :blush:

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 5:14 pm
by blinddrew
Sam Spoons wrote:Maybe we get a little too anal about the specifics sometimes :blush:
Yeah, I did wonder about that. And then I thought, "but I only want to do this once. And furthermore, if Max says 60kg/m3 is the best compromise, then I'm not going to argue." :D

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 5:38 pm
by Music Wolf
I'm pretty sure that I got mine from Insulation Express and paid a delivery fee as it was still the cheapest alternative. Just spend a little time thinking through how you will use it so that you only need to order the once.

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 6:02 pm
by blinddrew
Music Wolf wrote:I'm pretty sure that I got mine from Insulation Express and paid a delivery fee as it was still the cheapest alternative. Just spend a little time thinking through how you will use it so that you only need to order the once.
They're on my list to call tomorrow, the added complication (because there wasn't enough beforehand) is that my road has a low bridge at both ends, so I need to find out how big their delivery lorries are.
I'm confident on my amounts though.
Probably.

Re: Price of RW3 Rockwool...

PostPosted: Sun Sep 15, 2019 6:15 pm
by Sam Spoons
blinddrew wrote:
Sam Spoons wrote:Maybe we get a little too anal about the specifics sometimes :blush:
Yeah, I did wonder about that. And then I thought, "but I only want to do this once. And furthermore, if Max says 60kg/m3 is the best compromise, then I'm not going to argue." :D

:thumbup: :thumbup: :thumbup:

That was my take so I went to some trouble to get the RW3 variant. TBF the higher density stuff is easier to work with too.

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 9:22 am
by Hugh Robjohns
blinddrew wrote:Just under 16kg for the pack so about 35kg/m3.

I've just had it confirmed from Rockwool themselves. The 'Sound Insulation Slab' product which you see in Wickes and elsewhere has a density of 35kg/m3 which is okay-ish for broadband absorption panels but not ideal for corner bass traps.

H

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 9:36 am
by blinddrew
Funnily enough I've just had an email from them this morning as well. But mine said it was 45kg/m3...
Either way, I've got some phone calls about RW3 to make today. Cheers Hugh.
:thumbup:

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 10:11 am
by Hugh Robjohns
Hmmm... I think they make so many different products with such similar names that anything is possible. I asked about "Sound Insulation Slab" (product 180891, 400x1200x100mm) which is what Wickes current sell. And the reply was:

Rockwool UK wrote:Donna Lewis (Support - ROCKWOOL Limited)
16 Sep, 7:27 am BST

Good Morning,

The Sound Insulation Slab is 35Kg/m3 in density.

I hope this helps.

Many Thanks and Kind Regards,

Donna M. Lewis

Technical Solutions Consultant

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 10:27 am
by Wonks
Ah, good-old reliable 35 kelvin gram rockwool.

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 10:52 am
by blinddrew
Ah, I asked about 180889, to which i got the following response:
"The code you have mentioned below is Sound Insulation slab which is the equivalent to the RWA45, if you require the RW3 which is a 60kg slab then please quote 181186 ( im assuming you require 100mm thick slab) .
Thanks Nat"
Obviously not just the size that's different.

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 11:34 am
by Hugh Robjohns
Weird! :headbang:

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 1:59 pm
by blinddrew
Insulation Express's lorries are too tall. :(
However it looks like Jewson can do me a special order - but will take a fortnight.
Definitely making progress!
Will see what Selco can do tomorrow. :)

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 2:16 pm
by Wonks
This lot offer a range of RW3 packs in various depths and quantities. https://www.buildershoponline.co.uk/
They also offer it via Amazon.

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 3:46 pm
by blinddrew
Jewson and Selco and currently looking the most promising as I can go and collect it rather than having to try and find out how tall people's delivery lorries are...
Also Jewson's prices are good so I might just give myself a couple of weeks to work on fixing the sound holes before that lot turns up.
:thumbup:

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 4:02 pm
by Kwackman
Result! :thumbup: Good news.

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 4:09 pm
by Wonks
Could you arrange to meet a lorry on the other side of a bridge?

Re: Price of RW3 Rockwool...

PostPosted: Mon Sep 16, 2019 5:25 pm
by blinddrew
Wonks wrote:Could you arrange to meet a lorry on the other side of a bridge?
Two practical problems with that:
1) I think you'd have to work very hard to find a delivery company that would sign over a product to someone not at a specified delivery address.
2) The other side of the bridge is central York, where not a lot of HGV parking exists... :D
Anyway, one of Selco or Jewson should be able to provide so it will just be a balance of price vs order time.