what is R factor? how do you have UV on the windows? 8 ~' l8 m7 R$ @( l# {ChiaPet 发表于 2011-2-18 08:53
( V. V' a- J0 Z" }4 c0 bR factor is used to determine insulation capability. ' O, z/ [" @$ z4 s% r( W5 ^" O8 ]+ w/ I- q
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.# B" x( I4 P; K$ ?; \% m
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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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 * D! K/ n' X* i/ I. E
R factor is used to determine insulation capability.9 h t: c* _7 l2 i
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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.( |: C4 N! X- W2 x4 A. \
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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?+ y5 I* T+ E) X7 P
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.3 V4 b- E0 c* v: |
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. ) r) G) l: q5 _6 U# iYou don't have to upgrade all the windows. Only the important ones. * Z% h/ i, t! `0 B0 W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.