Quote:
I thought I read somewhere that roof colour had negligible effect on internal heat of a home if sarking was used.
From experience this is not correct
Browse Forums General Discussion Re: A rant about dark roofs ! 22Dec 24, 2009 10:58 am Building Thread viewtopic.php?f=31&t=13002 Site start: 8th July 2009 Handover: 11/12/2009! 5 months total build time. 40 sqs of luxuary...Bliss! Re: A rant about dark roofs ! 25Dec 24, 2009 12:45 pm 'A bottle of wine contains more philosophy than all the books in the world.' Louis Pasteur Vegie garden: viewtopic.php?f=19&t=27637&start=0 My Backyard Adventure Re: A rant about dark roofs ! 31Dec 24, 2009 5:06 pm Stefan Building the M3tr!con Liberty 42 at Stonecutters Ridge. The New Build Blog - "Life, In Progress." Stonecutters Ridge Community Website | My photos Re: A rant about dark roofs ! 38Dec 30, 2009 2:26 pm We're going with surfmist roof, for this very reason, along with foil under the tin and ceiling insulation. Do some developers not allow surfmist because of the glare?? or some other reason? If it's glare, then I'm sure the people on the hill above our house are not going to be happy Re: A rant about dark roofs ! 39Dec 30, 2009 4:27 pm Eccles Casa2 Yes, a black roof is best. However, you can't just stop at the roof colour. You need to do a couple of other things. The problem is the second part of the equation. People have the dark roof but then don't do the other things you suggest so any benefit can be realised. So they get all the disbenefits of the dark roof but none of the potential benefits. A dark roof, even with sarking and ventilation, can never match the hot day summer performance of the light roof with sarking. So it is always a compromise of summer performance for any potential winter gains - if these are even realised. Dark roofs also impact the urban heat island effect - making it hotter for everyone. Your comment of the night sky radiation cooling black roofing is also interesting. I understand this is not quite as effective in high overnight humidity climates. The other question I have about this is, is a black roof significantly better than a white roof for this purpose as the emissivity of both is about 0.9 so should therefore cool the same amount to night sky radiation? Yes, clear low humidity nights work best for night sky radiation (up to 5 degrees lower than ambient). Cloud cover and humidity reduce this. So you only get the benefit some nights (any are a bonus). I thought the emissivity of a dark roof is higher than that of a light roof. What makes you think otherwise? Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: A black tiled roof does not make the house hotter 40Dec 30, 2009 5:06 pm I wrote a response but have erased it. I'm over it. Hi All, I am looking to go with tiles instead of laminate timber flooring throughout my living areas for my new build (Ashbury 29 - Henley). My whole colour scheme is on… 0 24349 sorry mate, not wasting more time on this. Youve completely missed the mark on some fundamentals and regardless of how many times i try and put it to you differently, you… 11 9187 Hi All. I'm currently resurfacing the hardwood floors and when removing the old layers that there's a long dark line running across the boards. Does anyone know what or… 0 12770 |