what is R factor? how do you have UV on the windows?# \6 `9 n8 V8 M! \/ `
ChiaPet 发表于 2011-2-18 08:53
) O' ]8 g+ s4 \8 }. `R factor is used to determine insulation capability. h$ [1 Q. _7 {
- X. R P+ v& a% F0 B G5 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.' L' u: E3 ]" o! P B5 F
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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. ) D$ H- `5 S8 E1 u& V$ U0 _: Y: W8 s' e
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. # j" p* w) h: R- G+ z ...- u$ l! D/ H- a( E' c+ r! G2 m
小黄 发表于 2011-2-18 09:06
* y" w9 G3 M5 x' CThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?% Z0 h' |; s( T# F2 R
ChiaPet 发表于 2011-2-18 09:09
c" Y/ l% v7 e* j* f/ zAsk your builder to give you an exact quote. 6 }1 C& s# E1 N9 }You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. 0 Z- C+ S2 _- ?% L1 q! gYou don't have to upgrade all the windows. Only the important ones. ; w0 P! Q6 i% E, E2 m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.