Browse Forums Heating, Cooling & Insulation 1 Nov 08, 2010 1:20 pm Howdy, My house is has a concrete tile roof, hardwood frame and no lining of any type under the tiles. It does have yellow batts, however these seem to have compressed in areas. There is also a gas ducted heating unit in the roof. There is also a whirlybird I put in near the laundry to help get the moist air from the dryer out. I'd like to improve this situation as the house gets really hot in the summer and just does not cool down. The first thing I was wondering about; is it possible to install reflective foil on the inside of the roof joists from top to bottom to help stop radiated heat from the tiles? I've seen this done at a mates place when he had a roof storage space installed by a company, but that was just one small area. Any comments on this idea? Is it legal etc to do it this way and do it myself? Thanks. Regards, g@z. Re: Improving roof insulation 2Nov 09, 2010 7:37 am I dont know if legal or illegal but I dont see why not, I also think it wold be quite easy to do but a bit tricky in the edges/corners just make sure you watch where you step as a foot through the ceiling would go down too well Re: Improving roof insulation 3Nov 16, 2010 3:58 pm The best thing to do would be to get new insulation. I have retrofitted several types of sarking over the years and believe me: it is a nightmare! But if you have the patience, make sure you roll the product out sideways dont fix it against the tiles: foil products only have an r value when used with an airspace... and then insulate your ceiling Re: Improving roof insulation 4Dec 21, 2010 11:42 am Remember that because of OH&S regulations the reflective side must always face downward so you would do good if you install a product with some anti glare back to reflect the heat from the roof. Painting the roof with a bright and , where allowed based on the glare control regulations, reflective colour would also be very effective. Manuel Basiri Re: Improving roof insulation 5Dec 21, 2010 9:58 pm There is a thread on the envirotalk forum about retrofitting RFL. Putting this in is far more effective than batts to stop summer heat. Trying to do it from inside is hot and hard work. One contributor said that doing it from the roof is not has hard as it seems. Shift aside a line of tiles from apex to gutter and drape down a roll of foil over the battens affixing with staples (avoid electrical wires!). Replace tiles and repeat. Re: Improving roof insulation 6Dec 21, 2010 10:32 pm Dymonite 69 pulling off tiles to install sisalation (sark) or use that air cell crap isnt as easy as you make out mate its like doing a complete reroof ,not to mention the ridge your going to disturb,tiles your going to break and without removing ridge capping and hip pieces whats the point? and if your tiles are cyclone clipped ,,ohh my god you got problems lol try installing the highest rated batts and put in 2 or 3 e-vents for tiled roofs (there round vents about 100mm high which open by thermo) and eave vents for air flow as being a subcontractor for CSR Monier for 27 years i know a little bit about sarking cheers merry xmas Re: Improving roof insulation 7Dec 21, 2010 10:55 pm Foil doesn't work the same way as batts. It doesn't matter if there are a few gaps because it is acting as radiant barrier not a conductive one. So leave the ridge and hips alone. Re: Improving roof insulation 8Dec 21, 2010 11:28 pm Dymonite So your saying stay away from hips so not to disturb appox 1 metre ,stay 3 coures from top ridges Thats a complete waste of time and a mission in its self removing (average house) 3500 tiles to install 80% of sark depending on how many hips and valleys. Not to mention every second tile should be nailed how many do you think you would break? Install higher rated batts you be finished in half a day instead of a week cheers 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 11269 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 |