HW-Racer,

did almost the same thing but instead of CSR coolbats i used cellulose because the woolen blocks have gaps which will cause heat-bridges. not by far as good as cellulose flakes. result with the allumiumum foil (double sided, double woven): inside the roof only reaches 41° tops. under the ceiling in the roof side temp: 28° tops; inside the house ceiling temp even a bit lower cause a/c-ed room: 26° (ambient temp).

thinking of painting roof with reflective / white paint too to make it even cooler.

tint helps a lot if you have lots of windows. do yourself a favour and get a good tint, dont waste time with the cheap ones. no need for v-cool though. personally we used raybarrier which was good. cost for house is much lower than for car (per sqft that is).

Solareflect or similar will be used next time we paint the house i guess. last time not in the market so we just paint it white. also helps a lot.

i recently found this wall insulation paint from heatshielsolution.com - did anyone try it? thinking about getting them to paint the exterior of the house + roof with it.