Browse Forums Building A New House 1 Dec 08, 2009 4:31 pm We've just chosen a Colorbond roof for our Me_ricon home in south-east Melbourne, and notice from the estimate that it does not include sarking. We get a whirlybird as standard. I understand that sarking is very much recommended, and that we should get further insulation to go under the sarking. Can someone comment on this please?
I've just emailed the consultant asking for sarking quotes/options. My in-laws had costly condensation problems with their Colorbond roof (which had no sarking), but they live up in the hills. I would much rather pay a couple of grand (what's another 2k...the budget goes up every day!) now to avoid problems down the line. So...sarking, yay (yea?) or nay? Re: Sarking for a Colorbond roof. Required? Extra insulation? 2Dec 08, 2009 6:38 pm There are several threads on this very topic. Anti-con is mandatory under metal roofs in NSW and Qld. Re: Sarking for a Colorbond roof. Required? Extra insulation? 4Dec 09, 2009 8:53 am We didn't get a colorbond roof, but when we were consulting with our builder he said atleast a medium density sarking is almost necessary for colorbond roofs if not high density .. We ended up with concrete roof tiles, with no sarking initially. However, when our plans went to the estate council, they asked us to put sarking in .. which to my surprise, the builder threw in for free! Sarking protects dampness from rain getting through to the trusses and also adds a layer of insulation .. any insulation cannot be bad, but you gotta see your pocket .. I've also read in this forum that whirlybirds hardly do the job, the amount of air they pump out is 10times less than the hot air inside, so unless you've got a whirlybird for each sq area of your roof, its practically useless .. --- I don't have a signature - just this sentence saying that I don't have one - that'll do! Re: Sarking for a Colorbond roof. Required? Extra insulation? 5Dec 09, 2009 3:00 pm Just heard back from our builder. They do offer sarking (no word on cost yet), but not Anticon or 'builders blanket'. Sarking's apparently recommended but not mandatory in Victoria, suggested for extreme weather conditions. We're already getting R4.0 insulation in the ceiling, so I'm thinking that sarking alone will probably be enough for metropolitan Melbourne. Alk, we're going for Monument as well, so it's good to know you've had no problems so far. I saw someone in another thread who had rather stylish vents rather than a whirlybird, so that's always an option to go down should ventilation prove an issue down the track. Thanks for your input so far, guys, and I'd love to hear from anyone else with 2c to chip in! Re: Sarking for a Colorbond roof. Required? Extra insulation? 6Dec 09, 2009 6:38 pm i to would be interested in hearing the cost of sarking under a colorbond roof as i am concidering going down this road ............ cost depending i have read the posts good & bad about sarking but in my opinion i would rather have it than not have it just my 0.02¢ worth cheers rocket Re: Sarking for a Colorbond roof. Required? Extra insulation? 7Dec 10, 2009 3:30 pm rodrocket i to would be interested in hearing the cost of sarking under a colorbond roof Just over $1,500. Could have been a lot better, but could have been worse. I really don't have much choice as it can't be installed later and they don't allow you to bring in your own subcontractors, but I consider it insurance. $1,500 now will seem like peanuts compared to a condensation problem ruining all the timber and/or soaking through onto our ceiling. I'll do some more research on builders blanket, and maybe if I deem it necessary I'll pay the roofing guys cash in hand for materials to put some in when they do the sarking. Re: Sarking for a Colorbond roof. Required? Extra insulation? 8Dec 10, 2009 6:15 pm Modeski rodrocket i to would be interested in hearing the cost of sarking under a colorbond roof Just over $1,500. Could have been a lot better, but could have been worse. I really don't have much choice as it can't be installed later and they don't allow you to bring in your own subcontractors, but I consider it insurance. $1,500 now will seem like peanuts compared to a condensation problem ruining all the timber and/or soaking through onto our ceiling. I'll do some more research on builders blanket, and maybe if I deem it necessary I'll pay the roofing guys cash in hand for materials to put some in when they do the sarking. keep us updated on this as i am most interested in the outcome how many squares is the house that you are getting the sarking done on for $1500 cheers rocket Re: Sarking for a Colorbond roof. Required? Extra insulation 9Dec 07, 2014 8:44 am 55 mm anticon insulation blanket - R1.3 is the minimum for domestic metal roofing. 18 sqm roll cost $80.00 to supply. Many roofers will install it for free. Do not save money and install the above. Alternative (if your budget allows) is 75 mm/100 mm blanket or any aircell insulation Pavel Re: Sarking for a Colorbond roof. Required? Extra insulation 10Dec 07, 2014 10:58 am I thought sarking was for under tiled roofs. Use something like anticon55 under colour bond. The above says its a minimum but it's not a requirement in WA.. Not sure where you are though. Re: Sarking for a Colorbond roof. Required? Extra insulation 11Dec 07, 2014 10:58 am Aircell is standard with my builder up here in QLD, but its not so much for condensation, its moreso to reflect heat and stop most of it getting into the roof cavity. Of course you get much longer and colder winters in Melbourne! Dale - Building Newbie Proserpine, QLD Re: Sarking for a Colorbond roof. Required? Extra insulation 12Dec 07, 2014 11:28 am Im interested in this too, we had sarking in our quote but removed it at tender after the presenter said its not worth it, it doesn't add to our energy rating (its actually a few points less to have it) our house is 34 sq with monument roof also. It was $1999 in the tender doc. Re: Sarking for a Colorbond roof. Required? Extra insulation 13Dec 07, 2014 11:55 am If you are having an alfresco using gyprock or Aquacheck then anticon over this area is a must as the occurrence of condensation in these areas is much more likely. [Edit: Advertising links removed by moderator] Re: Sarking for a Colorbond roof. Required? Extra insulation 14Dec 07, 2014 4:04 pm Modeski rodrocket i to would be interested in hearing the cost of sarking under a colorbond roof Just over $1,500. Could have been a lot better, but could have been worse. I really don't have much choice as it can't be installed later and they don't allow you to bring in your own subcontractors, but I consider it insurance. $1,500 now will seem like peanuts compared to a condensation problem ruining all the timber and/or soaking through onto our ceiling. I'll do some more research on builders blanket, and maybe if I deem it necessary I'll pay the roofing guys cash in hand for materials to put some in when they do the sarking. Have you considered that 95% of homes in Australia wouldnt have Sarking. I looked into the Anticon...................its does a good job of reducing rain noise on a tin roof. Ive seen charts on how much energy you can save with it...................its almost nothing. Stick the $1500 somewhere else. Saving money on quality stuff done right firstime Our Build Thread https://forum.homeone.com.au/viewtopic.php?f=31&t=66810&p=1094349#p1094349 Re: Sarking for a Colorbond roof. Required? Extra insulation 15Dec 11, 2014 3:07 pm Wandin Valley Modeski rodrocket i to would be interested in hearing the cost of sarking under a colorbond roof Just over $1,500. Could have been a lot better, but could have been worse. I really don't have much choice as it can't be installed later and they don't allow you to bring in your own subcontractors, but I consider it insurance. $1,500 now will seem like peanuts compared to a condensation problem ruining all the timber and/or soaking through onto our ceiling. I'll do some more research on builders blanket, and maybe if I deem it necessary I'll pay the roofing guys cash in hand for materials to put some in when they do the sarking. Have you considered that 95% of homes in Australia wouldnt have Sarking. I looked into the Anticon...................its does a good job of reducing rain noise on a tin roof. Ive seen charts on how much energy you can save with it...................its almost nothing. Stick the $1500 somewhere else. Anticon is rated at R1.3. It has a purpose and one that i think is worth the money. Sarking is rated at R1.0 as is foil around the walls. Again it has its purpose in helping with reflective heat. It reduces the heat level in your roof, which in turn reduces house temperature level. It has no direct saving on energy, unless you want to map it's use against air conditioning or something. If you are referring to Energy Star rating then yes you are correct, it only has a small increase in star rating. But again that's related to energy. Both Sarking and Anticon will prevent dew issues, or even if you have a cracked tile, prevent water dripping down onto something electrical or your gyprock. Houses should have either Anticon (for tin roofs) or Sarking (for tiled) as a standard, but it is not a requirement. Builders won't install anything unless you ask for it. It is not a requirement in Brisbane at least and i can't understand why. For $1500 i would recommend it. Our current house has sarking (tiled roof) and it has prevented some bad water leaks. My new house has a tin roof with Anticon. My Noosa 23 Build - viewtopic.php?f=31&t=72782 Re: Sarking for a Colorbond roof. Required? Extra insulation 16Dec 11, 2014 3:24 pm I have to agree with you whzz28. Anything that helps keep the heat out of your house in Summer has to be a good thing especially if you are living in any of the hotter states or at least the hotter parts of our country. Stewie Re: Sarking for a Colorbond roof. Required? Extra insulation 17Dec 11, 2014 8:16 pm We built before and are about to again. We did not do sarking the first time - but read a lot about it after we started building and even looked at doing it post build (very expensive/difficult). So I cannot comment on the difference living under it compared to not. But my understanding is sarking is to keep heat out and insulation is to keep heat in......so maybe in Victoria upgrading insulation may help more than sarking - we are in SA. There are a few threads on it. For us $1800 for a massive roof was a no brainer, having r6.0 ceiling insulation. And regarding whirly birds there are a few threads but they are also divided on the pros cons - we are not having a whirly bird. Re: Sarking for a Colorbond roof. Required? Extra insulation 18Feb 04, 2015 8:22 pm Hey guys, quick question and thought I would stick it on here. We are about to build in gold coast area qld, single story Colourbond roof. I'm thinking of trying to get a hold of the roofie before the day comes along before the roof goes up and see if he'll do a cashie to put in insulation. But first I need your help in figuring out what's what. I've been goggling all types of insulation and lost on what's what. I see anticon blanket. Is that a brand or the type of stuff I need. Also see different names terms builders blanket, pink batts, ceiling batts, etc. And what's the difference between the stuff that goes under the roof sheets and on top of the plaster board. I saw some insulation blanket and foil 75mm $120 a roll. R value is 1.8 does 18m2 Or $100 for 55mm R value 1.5. Any help would be great, thanks. Re: Sarking for a Colorbond roof. Required? Extra insulation 19Feb 04, 2015 8:33 pm Air-cell Insulbreak 65 or Green Insulation Reflecta-cell are reflective foil insulation which act to reflect the heat before it gets into the roof cavity. Also acts as a vapour barrier as well. It sits over the top of the roof trusses under the metal roof. Couple this with some insulation batts in the ceiling and you will be good for both summer and winter; although it will be more effective in the summer - important for us Queenslanders who dont get long, cold winters Dale - Building Newbie Proserpine, QLD Building Standards; Getting It Right! Hi all I’m in VIC and had some storm damage in my garage a month ago. Gutter found not fit for purpose. Insurance company saying the guttering and flashing to be fixed… 0 11680 Minimum overhang into gutter must be 50mm, turn down tool should not split the sheet. it seems wrong tool for the profile was used, the flashing cannot slope back. Rib… 2 2080 Your house roof does not show rusting other than some surface rust on the flashings. In my opinion you dont need to replace or paint the roof other than treat surface rust… 1 10105 |