maccool wrote on Sun, 22 October 2006 22:27 |
Ian, this is a real bitch when all the DIY info talks Corning 703 which is almost unavailable in the UK. Knauf's Rocksilk slabs seem to be the solution. Unfortunately, most of the suppliers I contacted were pretty thick and couldn't get their heads around what I wanted the material for. Ask for rockwool slabs, that'll get you started. I had trouble finding 25mm slabs for some broadband absorbers but found it eventually. 50mm should be readily available. |
franman wrote on Wed, 25 October 2006 01:21 |
Finding Rigid Fiberglass Boards can be a challenge, even over here in the states. This is not Home Depot materials... what you're looking for is: unfaced Rigid Fiberglass Insulation Boards generally 2" (5cm) thick at 3-5lb/CF or 48KG/CM to 6 lb/CF or 98KG/CM. We have to go to specialty Insulation suppliers over here in the NY area .... Hope this helps.. |
Ethan Winer wrote on Wed, 25 October 2006 20:11 |
There are a few reason absorption coefficients can wind up greater than 1.0, but the main one is the panel's edge surface. |
ruffrecords wrote on Thu, 26 October 2006 05:21 |
I expect Rockwool uses a different test method as their results never exceed 1.0 even at high frequencies which may explain why their values are slightly lower than Corning's for the same density material. |
mr jason wrote on Sat, 28 October 2006 05:23 |
I got my slabs from Studiospares. There's no Wickes near me, and they often have to order slabs in. I'm not far from you, in Bury St Edmunds. I checked prices in loads of places, and after initially thinking Studiospares were expensive, and making sure I was comparing "like-for-like" in the end their price was pretty reasonable, and it was handy to get them delivered rather than driving to another town to get them from somewhere else. They're Rockwool RW3, 50mm deep, and 1metre by 60cm. I got 2 packs, and made 4 acoustic clouds, and a some corner traps. I'm really pleased with them. |