Browse Forums Heating, Cooling & Insulation Re: Insulation questions 2Mar 01, 2016 3:29 pm Non compressed insulation 70mm thick would give around R1.5. Depending upon your location you should be looking at around R4.0 or R5.0 as a minimum. There's no reason not to leave the existing & put a new layer of batts over taking the normal safeguards with wiring, downlights etc. Peter Clarkson - AusDesign Australia www.ausdesign.com.au This information is intended to provide general information only. It does not purport to be a comprehensive advice. Re: Insulation questions 3Mar 02, 2016 8:50 am Is it easy enough to reuse if we renovate? Also I we have double brick walls but these just have a cavity in them. Is it worth insulating the cavity - I have heard of issues arising with this in relation to mould growing in the wall insulation and then being impossible to remove. Re: Insulation questions 4Mar 02, 2016 9:54 am What is the condition of your existing ceiling insulation ? If you read some of the points I raise here ... viewtopic.php?f=20&t=82014&p=1513075#p1513075 you'd know why I ask. Regarding your cavity brick walls, the only real way of installing insulation to an existing cavity is by pump-in insulation. Most of the stuff these days like Rockwool has been treated to be moisture resistant so even if it gets wet by wind driven rain on those walls it won't absorb any moisture. Personally I really don't like any form of pump-in insulation as I find the operators never seem to do a complete job of it leaving a few gaps here and there which lessens the effectiveness of the insulation quite a bit. In your case though it may be your only option and would certainly improve the R-rating of your external walls. Stewie Re: Insulation questions 5Mar 13, 2016 8:48 am Where is the house located? The answer will vary depending on your dominant climate. Building Services Engineer Renovating our 1960's modernist home in Brisbane https://forum.homeone.com.au/viewtopic.php?f=53&t=82091 Re: Insulation questions 6Mar 15, 2016 1:14 pm Hello There are a few options when it comes to ceiling insulation. You can insulate over the existing insulation (older varieties of insulation do vary and some would hold very little R value, birds nest looking material etc). You can cover existing with batts (however, you want to minimise gaps as much as possible so if under layer is patchy then it may provide gaps in the upper layer). Or you can blow in insulation, we manufacture a cellulose (recycled paper) insulation here which you can reach a very high R value with proving a great asset in Winter. Removal is the other option for good placement of polyester or earthwool batts. Renovations will prove easier with the batt format installed but best also to keep in mind what R-value you want to reach when choosing product... Re: Insulation questions 7Mar 19, 2016 9:00 pm Jarek D101 I have an older house and we may be renovating at some stage in the next few years. The house does not have air conditioning and has been really hot over summer. I have got up into the roof cavity and it appears that the insulation up there is relatively thin (about 7 cm thick). It appears to have been there for years however it makes me question what its R value could be (in that even the lowest R value insulation currently on the market is thicker than this). Would I be right in assuming therefore the current insulation can possibly have a decent R value? I was thinking about getting it re-insulated – would this make much of a difference? Given that we are going to be renovating at some stage can installed insulation be reused easily (i.e., if we have to subsequently pull some up is it destroyed or can it be reused) or would we have done our dough? Have you considered to have double glazed windows. usually double glazed windows with thermally broken frames Stop up to 70% in heat loss and 77% in heat gain. critical part is you have to check to get proper thermal broken frames. and also Double glazing significantly reduces ambient noise as well as intrusive sounds like traffic, airplanes or noisy neighbours. there are few company's out there. ill list a website link below, so you can checkout. they also do free measurement and quotes. http://www.nuwayglassandglazing.com.au/ i hope this will helpful for you. good luck. Double glazing is not a substitute for good insulation in the ceiling. And installing double glazing is very expensive compared to the cost of batts and thermal curtains/pelmets. Hey guys building a new place through a volume builder and just wondering if i should complain to the site supervisor as we just had plasterboard installed. Looks like… 0 11273 1000000% definitely add insulation. I have in my home and it makes a big difference minimising sound transfer. Insulation is pretty cheap and definitely worth it 2 6191 |