what is R factor? how do you have UV on the windows?) J1 R4 Z) {; S6 l' `# _! d, v# L
ChiaPet 发表于 2011-2-18 08:53
+ T, n- M) ^; j3 X2 @7 V0 oR factor is used to determine insulation capability. - B( `8 U& a% }! q0 |9 x" t; j3 p* m) t }! E; c1 c" J! j
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. 4 A: n" W5 T8 F# q- J( w/ d1 W5 t9 P' a" F& W! G
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. , k5 |! P) g! b. `4 e( ?: x/ N# _3 Q: p+ j
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. ( n0 Z* ?4 Y. o) Q, [. o [ ... 5 s" {* ?) Z; H! F2 ]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? {; k# w( s) M3 B4 J1 n, YChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.- q: ?3 A* G& N8 O/ F
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. , ~. h# ]" U( L' pYou don't have to upgrade all the windows. Only the important ones.+ F* Z' t3 @9 a7 Y* }
小黄 发表于 2011-2-18 09:13
& d& F3 }1 q, ` M7 R. E0 m. j * `$ @; h N9 h4 I7 _( Tit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.