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Studio construction materials

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Re: Studio construction materials

PostPosted: Tue Aug 01, 2006 6:55 pm
by PrinceXizor
For real bass absorption (i.e. if you don't want to hear your drums on the other side of the wall)

I'm afraid that is NOT what is meant by creating bass/broadband absorbers. These types of absorbers are meant to absorb sound so that decay times and levels are even and low (i.e. no modal ring, etc.). They are NOT intended as sound isolation. Acoustic treatment DOES NOT mean sound isolation.


Re: Studio construction materials

PostPosted: Wed Aug 02, 2006 10:51 pm
by Gary M
studiospares being avoided?

Their acoustic treatment is actually more absorbent that the auralex equivalent, being more dense and thicker (i.e the 50mm stuff starts at about minimum thickness 25 mm and raises to over the 50mm/ 50mm is the average, auralex peak at 50 and go down to about 5mm) They are also miles cheaper and at 50 x 50cm they are easier to arrange on the walls.

their rock wool is not over retail at 35 quid for 8 slabs of rw3, and has came down in price over the past year or so, remember the stuff from wickes etc.. is a lot less dense.

their own brand sheetblock works out a whole load cheaper too.

I've found over the years the studio spares guys to be really helpful and if your getting a load of stuff from them you a get a bulk buy discount.

Re: Studio construction materials

PostPosted: Wed Aug 02, 2006 11:01 pm
by Gary M
Wurlitzer wrote:Can anyone suggest a good place in or near London to buy thick, dense concrete blocks? I'm looking for the 190mm thick, maximum density ones. Wickes and Jewsons only seem to sell the standard 100mm thick ones for cavity walls.

I found some wholesalers on the net that have the full range but they only seem to sell to building suppliers. So someone somewhere must have these blocks to sell to the public!

Look up j p morans, they are in willesden & kilburn and will deliver, usually very well priced.

also travis perkins i would avoid like the plague, Bulders depot is very cheap too (in cricklewood), same bloke that created castles and then sold out to travis perkins.

I used to do Loft conversions in and around london and these were some of the cheapest places that we sourced materials, That was 2 years ago though.screwfix for a lot of other stuff like screws nails, and cheap tools the ebaurer screw guns seems to last longer that the dewalt ones we had.

Re: Studio construction materials

PostPosted: Thu Aug 03, 2006 2:43 pm
by ronaldo77
Yes I'm fully aware - as are most people on this thread - that acoustic treatment is not the same as sound absorbtion.

Isolation or 'resilient' bars are there so that structural vibration caused by low frequences do not travel from the inside wall to the outside wall. This means that low frequency sounds like a kick drum are better soundproofed.

Re: Studio construction materials

PostPosted: Wed Aug 09, 2006 8:57 am
by Marty Bampot
G'day everyone,

I've been trying to find a source for Rockwool slab in Australia and finally had some success, so I thought I'd share it just in case there are other Aussies interested.

FM Insulation in Sydney have a good range, and the boss there Mike Flavell is very helpful.

In Perth (where I am), Australian Insulation Supplies in Jandakot is the place. Their boss Ian Swann is also very helpful.

Mike Flavell said it also should be available from CSR Bradford in all capital cities, but they have been too busy so far to respond to my enquiries.

Anyway, I've been down to AIS and picked up two packs of 100kg/m3 at $90 each. Packs are 1200x600mm and contain 6 slabs of 50mm or 12 slabs of 25mm.

Now all I have to do is brush up on my pathetic woodworking skills :headbang:


Re: Studio construction materials

PostPosted: Thu Aug 10, 2006 2:56 am
by Marty Bampot
G'day everyone,

I made that last post a few hours too early. I have now had a reply from CSR Bradford. They have rockwool slab available in 60, 80 & 100 kg/m3 densities and 25mm & 50mm thicknesses, but their sizings are 1500x1200 which may be more useful in some instances. They tell me that theirs is the only Australian-made rockwool. The price per sq.m area is comparable to the other companies 1200x600 slab. :)

Re: Studio construction materials

PostPosted: Mon Jan 08, 2007 10:18 pm
by bluey
Does anyone know where to get acoustic doors seals and neoprene strip? I tried James Dolman but they do not do them. I also tried Custom Audio Design and they quoted £144 to fit out one door and frame. This seems a bit steep tp me but don't really have anything to compare.

I live in Somerset but anywhere in the country would be good.

Cheers, Bluey

Re: Studio construction materials

PostPosted: Thu Feb 01, 2007 5:27 pm
by jazzmoose
Just going back to Martin Walker's post on open & closed foam.
I'm trying to build some acoustic treatment panels (to stop high & mid freq reflection) and bass traps and have got my hands on around 2 cubic metres of packing foam which I'm assuming is 'open'. Each panel is around 50cm square and about 4cm thick - is this ideal or should I be looking at branded stuff like auralex?

Also - is the expanding foam gap filler you get in cans any good for acoustic treatment? Been doing some DIY with it and it sprang to mind for filling bass traps.

Re: Studio construction materials

PostPosted: Fri Feb 02, 2007 11:47 am
by Martin Walker
No material is ideal when you have no real idea of its acoustic properties ;)

However, try temporarily piling it all up in a corner of your room to see if it makes an audible difference - if it does then it's worth pursuing the idea.

I very much doubt that expanding foam filler will be of use acoustically, since it's generally used as a gap filler and to solve draught problems - this means it's definitely not open cell, and so it won't provide absorption.



Re: Studio construction materials

PostPosted: Tue Feb 13, 2007 2:47 pm
by Steve Marshall
One trick I've used a lot is to buy 'painters dust sheets' from DIY superstores: they're very big (10' square at least) and usually made of raw cotton. I used to find linen ones but haven't seen them for a while. The material is acoustically transparent and ideal for stretching over frames filled with rockwool etc. My current studio has some moveable absorbing/reflecting panels made from thick plywood; one side plain, the other covered with fibreglass and then these sheets stretched over and stapled. They do sometimes have seams though, where strips have been joined, but it's a lot easier than using a sewing machine.

Re: Studio construction materials

PostPosted: Wed Nov 07, 2007 3:18 pm
by DiamondJoe

First time here, bumping this thread, and strictly speaking this isn't music related but I would really appreciate some good advice.

I have a first floor flat and under my bedroom is someone's living room, through which I can hear all their conversations and TV noise. The bedroom is about 17m2, with a timber floor. There is already some kind of acoustic mineral wool in between the joists but frankly it 'aint working. I've considered a couple of options: 1) Seal the floorboard gaps with acoustic mastic, put down an acoustic membrane, then something like Quiet Floor, then the carpet. 2) Overboard the floor with some plywood, put some Green Glue on, then another layer of ply, then the carpet.

I don't think I can put down plasterboard or a floating floor as I don't think the floor/ceiling below will support it. Also, my budget is not unlimited, which is why I'm shying away from Quiet Floor and that kind of stuff. Anyone have any suggestions? I'm based in North Yorks and I'd also like to know of any good suppliers round here.

Re: Studio construction materials

PostPosted: Fri Nov 16, 2007 6:58 pm
by Comino
hi dear people I am in a panic rush so please excuse me if i might be asking in the right place but i hope i am ...

i am about to do up my studio now the walls of my room are made of 9 inch lime stone but still need to break the sound from next room and the dear neighbor so anyway i am using 30 mm rockwool with 2.5 inch wooden studs now i had the idea of fixing this 2cms rubber foam in between the stud and the wall so that sound absorbed by the plaster board on to the stud will not leek to the wall i already fixed one stud and it looks fine of coarse i have tighten it a bit so the size of the rubber foam and squashed a bit if you know what i mean .. now the BIG question is what guarantee do i have of how long the rubber foam lasts i am worried that it will disintegrate and of coarse the studs fixed to the wall will loosen up and the room starts to fall apart lol :headbang: i hope i explained my self clearly and i really do hope that i can get some help the weekend is coming up and i really wish to get on with the work :angel:

thanks and i wish you all a great weekend
greetings from Malta

Re: Studio construction materials

PostPosted: Sat Dec 08, 2007 5:01 pm
by Dave W
I'm about to build some absorption panels similar to ones built by Paul W in ... s_0706.htm
Is there any functional difference between Auralex wedgies and Sonomatt acoustic panels (both 2" thick) for facing the rocksilk panels with?

Re: Studio construction materials

PostPosted: Sat Dec 08, 2007 5:36 pm
by Dave W
Another question: should I treat the rocksilk face at the back with something to seal it, and if so, with what? I read that PVA glue diluted with water about 20 times and sprayed on works well, but would welcome suggestions/comments.

Re: Studio construction materials

PostPosted: Sun Jan 06, 2008 1:26 am
by Vorax
Picking up on the open / closed foam thing, and the the suggestion of sealing rockwool/rock silk, either by wrapping in polyester batting, or spraying with diluted PVA - won't this then decrease absorption by reflecting sound, and thus defeat the whole object?