what is R factor? how do you have UV on the windows?# o; ]) q0 I: N g8 w
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.8 h [7 D$ E" m0 E
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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. 1 W( B7 N4 z3 n3 R8 B4 _7 g4 N- J' H" v' v& F; ?4 O
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. # p4 r: a9 ?) ?& i, D9 R( E7 Y; w! W% F
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. 1 g F: c7 Y2 c2 O% J1 ~. C( R ... . f( ~1 k v7 k8 r# t9 B小黄 发表于 2011-2-18 09:06
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Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 2 f; f) Y2 G- e( t0 E7 r! f. o- [+ AChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.5 k4 \0 r! c5 \7 P- X F l7 Y
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 7 U1 W1 f, c8 B' ZYou don't have to upgrade all the windows. Only the important ones. " [; n, T, U9 A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.