Browse Forums Renovation + Home Improvement 1 Aug 23, 2020 8:44 pm Hi All, Would love some advice / recommendations from you Our home is 3 years young. We have a colorbond roof but we have absolutely no sarking or anticon under our roof, (who knew this wasn’t a standard thing?) Not only is it loud when it rains but we’re starting to experience mould under our alfresco due to the condensation in our roof. I don’t think our ceiling insulation is adequate enough to compensate for the cold temps in the roof - it’s been really cold in Melbourne this weekend and I just feel like our house is so cold (was walking around with layers and a scarf on most of the day). My kids bedrooms never seem to warm up despite having the heater only zoned to their rooms and the common zone and not the rest of the house. So two questions for you all: Has anyone had spray insulation foam put on the inside of their colorbond sheets? Does it make a difference or is there anything else you could recommend (please keep in mind my husband is not handy at all) Secondly, should I put another layer (maybe R2 soundbatts) on the top of our R4 ceiling batts, would this help deaden the sound of rain AND make the house warmer?? Thanks so much in advance for any answers or advice. Re: Roof Insulation 2Aug 24, 2020 5:56 am Hi! I used sprayed insulation AUSFOAM 30 for my roof. The benefits: "Duct leakage and heat loss or gain from ducts are much less of an issue. Air sealing is easier in the roof than in the ceiling. Dust and loose insulation are less likely to migrate down to the living space. Energy costs are lower when the attic is sealed." Re: Roof Insulation 3Aug 24, 2020 1:48 pm Hi, If it is colorbond, I personally would consider getting a roofing crew to remove the sheets and then install a proper anticon blanket. If you had standard foil backed sarking your condensation problem wouldn't necessarily be properly dealt with. This is due to the foil (in contact with the roof sheets) will still be reaching dew point regularly during the colder months most likely...and therefore the condensation would likely still drip down into your ceiling/insulation etc. So there are some options to consider, including:
Standard whirly birds just won't really do that much to be honest. In our recent new build we had a fairly new CSR product installed as sarking under our colorbond. It is called EnviroWrap HTC from memory and it is a breathable sarking product that allows the moist air in the roof space to pass through, hit the colder roof sheets @ dew point and then drip back onto the top side of the sarking. Then it subsequently drains to the gutters. But to be honest this sarking we used is more expensive than anticon blanket, so I would go with the blanket instead. If you plan in living in this house long term then I would do the whole sheet removal and anticon install. Then take a good look at your insulation levels and installation quality and go from there. ** I would still install an AiroMatic or two though. --------------------------------------------------------------------- Check our Homeone build blog here Re: Roof Insulation 4Aug 24, 2020 1:52 pm TheMasta Hi! I used sprayed insulation AUSFOAM 30 for my roof. The benefits: "Duct leakage and heat loss or gain from ducts are much less of an issue. Air sealing is easier in the roof than in the ceiling. Dust and loose insulation are less likely to migrate down to the living space. Energy costs are lower when the attic is sealed." Howdy, This all depends on your opinion relating to whether or not to ventilate your roof cavity though. Personally I would rather ventilate rather than air seal the roof. Sealing the ceiling plaster/top plates etc is not difficult especially if the insulation is out. You basically do what I did and go around with many tubes of proper silicon caulk and fill up any gaps in top plates for electrical, plumbing etc and then joins between plasterboard and top plates. Sealing your roof would then involve careful setup for things like air extraction fans to the outside etc. There are plenty of resources online looking at the building science of ventilating roof spaces. Worth reading up I reckon. --------------------------------------------------------------------- Check our Homeone build blog here I am saying that double brick has similar thermal performance due to thermal mass effect. It will be still very interesting to see the state of your framing after 10-15… 10 23082 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 8902 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 3660 |