what is R factor? how do you have UV on the windows?0 D8 X* \+ K2 s4 o3 v( p
ChiaPet 发表于 2011-2-18 08:53
( F" U* A( j" \2 ZR factor is used to determine insulation capability. ( n4 @1 f: u. ]" M9 X7 g8 B" z1 }3 o4 v5 i. M5 u3 ~+ f! G2 ]
Here in Canada, walls are well over R20. So, even if the exterior walls are hot under sunlight, it won't really affect interior living space.' r x6 q R7 l, O
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However, windows have lower R factors and allow UV radiation (and radiation of other frequency) to enter the house. So, it's best to upgrade your windows, if radiation (i.e. sunlight) is a potential problem. Typically, you can upgrade your windows to triple pane, with sun-stop coatings on both sides.
R factor is used to determine insulation capability.8 H$ m( q6 }% W7 E3 e, L, L: B7 g" h
0 u {1 ~7 n# kHere in Canada, walls are well over R20. So, even if the exterior walls are hot under sunlight, it won't really affect interior living space. * q8 y/ N* r1 @0 |- A ...3 N, {& ~ Z# ]% N/ ^" \
小黄 发表于 2011-2-18 09:06
% q& `0 w a! f1 ZThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?! a) Y% P: Y. W- j' E. o
ChiaPet 发表于 2011-2-18 09:09
3 l5 X9 a* f8 N. w- l$ a0 TAsk your builder to give you an exact quote. 8 \2 x5 n. i* xYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) B& e! ]$ R/ m; h+ a7 MYou don't have to upgrade all the windows. Only the important ones. + Z% [) w& i/ m1 X! U小黄 发表于 2011-2-18 09:13
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it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.