what is R factor? how do you have UV on the windows?8 `, D' V% P6 o; g
ChiaPet 发表于 2011-2-18 08:53
" i2 G0 v+ R- }- v: F& GR factor is used to determine insulation capability. 9 Q7 y1 i2 F$ E1 Z- V- s+ o) O7 F 7 U8 e6 r" l# U3 XHere 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. 3 }) }4 K: K8 }( W1 g1 T& u9 g, } A! Y$ e7 r% ~) y
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.$ r. y$ W- n8 s, ~
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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.- H, g/ A/ g5 `( {2 E
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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? 3 h/ s* c) z6 n7 l% e* RChiaPet 发表于 2011-2-18 09:09
8 r3 q) v4 P. J4 q$ E5 [) }- x IAsk your builder to give you an exact quote.; O% a R- ]5 e
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.- F1 k. g6 r; p' r! e3 j
You don't have to upgrade all the windows. Only the important ones. . I( N4 ~1 H& P5 q小黄 发表于 2011-2-18 09:13