Browse Forums Building A New House 1 Jun 25, 2009 12:36 pm I was talking with my builder's sales rep recently and he isn't sure that R2.0 batts will fit in a 90mm external wall cavity. From my own investigation of a few different insulation brands, their R2.0 batts are 90mm thick. Obviously it wouldn't be ideal to compress them at all, but to me it seems that a 90mm batt would fit just fine in a 90mm cavity. Or does things like wiring, plumbing etc become an issue if there is zero free space in the cavity? Re: R2.0 batts in 90mm wall cavity? 2Jun 25, 2009 12:45 pm you can ring an insulation service company and ask them, i did mine with Hutton Insulation @ thomastown , his name is Eddy phone 94693399 ....sorry, just realize you are at SA, but i think it is still ok to ask them Re: R2.0 batts in 90mm wall cavity? 3Jun 25, 2009 12:53 pm We have Rockwool R2.0 insulation in external wall cavity & also internal walls as sound proofing for the theatre room. 25 years in the planning. Inspired Homes - Townsend 288 (moved in 1/8/09) Re: R2.0 batts in 90mm wall cavity? 5Jun 26, 2009 12:23 pm Thaks folks, thats what I figured. But I just wanted to check that no one has had trouble with 90mm R2.0 batts in a 90mm wall cavity, or if anyone knows a reason why it wouldn't be a good idea. Re: R2.0 batts in 90mm wall cavity? 6Jun 26, 2009 8:00 pm borg R2 are usually just a bit more dense than R1.5 I think you're mistaken. They are usually the same density, just different thickness. Check the manufacturers' websites. Most batts are made in Australia by either Bradford or Pink (also known as Fletcher Insulation). http://www.bradfordinsulation.com.au http://www.insulation.com.au Re: R2.0 batts in 90mm wall cavity? 7Jun 27, 2009 9:24 pm I've just come across the same scenario where my builder advised that R1.5 would be their recommendation, as R2.0 may push out the plasterboard. I've never heard of that before. I didn't question him at the time but maybe I will now. I wonder if the Batts settle over time (due to gravity) causing them to press against the plasterboard at the bottom? Building again. What have we got ourselves in for!!! Re: R2.0 batts in 90mm wall cavity? 8Jun 27, 2009 9:49 pm R2.0's are specifically made at 90mm to go into a 90mm frame. never go with a batt that is thicker than the wall. Generally most builders will not know about insulation. Speak with your local insulation guru if you want to find out specific details. P.S. I am an account manager for higgins insulation dealing with trade customers. You will have no problems with plasterboard popping if installed correctly. Re: R2.0 batts in 90mm wall cavity? 9Jun 28, 2009 8:53 am Spud McDoug Or does things like wiring, plumbing etc become an issue if there is zero free space in the cavity? I would be really interested in an answer to this question too as we try to get our heads around the whole Insulation issue ourselves. We are going to take up the task to sound proof 75% of the new house (frame up somewhere in August, hopefully) and are also going to have a lot of wires and cables in the same cavity. How are we going to do that wisely? I just had a read on the DIY page of Bradford Insulation which states that wire should be put on top of the Insulation. Does that mean that they can not be placed between two batts but that it would be okay to place them between the insulation and the plasterboard? That might be difficult as here in OZ the wires are allowed to be pulled through a hole in the frame. Where we come from all the wires had to be in a conduit. So if the wires are just pulled through a whole on the insite frame they will always come in contact with the Insulation batt, wouldn't they? Found the answer. The recommended distance is .... 1 5989 Hey guys, what’s everyone opinion on James Hardie linea direct fix to frame? Would this be the most common method and anybody ever had any problems down the track? 0 5159 |