what is R factor? how do you have UV on the windows? ' [6 F; `/ G2 J% J1 EChiaPet 发表于 2011-2-18 08:53
; Q1 J) G! |, G5 b) ~. t! d
R factor is used to determine insulation capability. % [% f5 \# [1 X7 Q- u# }: q# L ( r) F1 `# B; j& y( M% yHere 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. 2 s' S: M- g8 e% F ' P) u2 Q$ x. f3 z, t- Q9 bHowever, 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.7 O- ^# a9 W+ K$ x% o3 [2 n
6 O: v5 j- n- R: l( bHere 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.) I+ z1 I4 | [ Y, X; F
... 2 U; j8 V0 B0 _4 \, |小黄 发表于 2011-2-18 09:06
9 ]" }; E$ ]: j) p! t1 v1 C. \" K& oThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 3 K3 P- ~- _) ~5 H/ s' EChiaPet 发表于 2011-2-18 09:09
3 J" g a7 i% S# i" c; }
Ask your builder to give you an exact quote.0 C5 ]" n. W$ b
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.& m& s) T0 D( |3 `
You don't have to upgrade all the windows. Only the important ones.$ ?& i! V! }0 [4 m; i% L3 _
小黄 发表于 2011-2-18 09:13