what is R factor? how do you have UV on the windows?5 M: \; U/ ^. j) g. w" T
ChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.8 O+ o6 W2 R! W& A" H& o" J3 @
- V& J) {( d, M; L3 ]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. . c q6 f) [( _: Q5 g" i6 c - c8 B9 p/ p) i& i/ }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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 7 s+ H% H2 W5 a8 F1 W4 t
R factor is used to determine insulation capability. - J7 U6 ? d3 ?% A5 d 1 _1 b5 @. j9 @5 MHere 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.9 E8 ?- [3 q6 n
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小黄 发表于 2011-2-18 09:06
0 |/ W- E+ D, L" Q. v( IThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?$ a9 Q; s- d( K/ F( @
ChiaPet 发表于 2011-2-18 09:09
* N$ p# X6 y3 @Ask your builder to give you an exact quote.. [6 {: r5 W! L) r. g$ y) n9 \
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. # U* l5 b: ?$ ]& T3 M. m5 AYou don't have to upgrade all the windows. Only the important ones.# M- e% x" f) K- O; J9 V( u
小黄 发表于 2011-2-18 09:13
# H) L% B7 J+ O6 j5 i: y $ U$ [* e5 |! B' ?0 n& \/ p6 R$ }0 H& Zit must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.