what is R factor? how do you have UV on the windows? L @% _2 c3 F6 L- R( dChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability., n4 i% J* q# E" b- y
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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. ! D6 n1 K0 N5 C( ?/ J" R( p0 A; I$ i. S% p: q7 p
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. O8 F3 _" t* v! K/ f$ w% r+ G
" A% m) F4 T0 _" p; U* \9 \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. # x5 S% F$ w( O4 n ... + m3 H8 v2 ?1 |: o! J. a$ r! R小黄 发表于 2011-2-18 09:06
5 K# }. V1 ]8 r: a3 VThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?% c5 e4 @( X& B+ I
ChiaPet 发表于 2011-2-18 09:09
' S0 l4 K+ W, Q/ X8 t1 {) W# a5 zAsk your builder to give you an exact quote.! Q6 O; D1 o& x" O" u9 Q
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. # \% f$ P4 u8 d, N, B5 f$ z2 AYou don't have to upgrade all the windows. Only the important ones. 9 M8 V6 H7 V1 P* N/ X, p小黄 发表于 2011-2-18 09:13
) f- }4 i3 k5 Z6 } ' J/ j. [+ R, [2 X- _8 ` [it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.