what is R factor? how do you have UV on the windows? 9 h/ Y, S, E- eChiaPet 发表于 2011-2-18 08:53
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R factor is used to determine insulation capability.2 c: l; d- G" v$ i/ `. A
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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.8 V8 V8 ~' T5 g7 J2 U6 Y9 P
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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.
R factor is used to determine insulation capability. . i/ n- U0 R; q1 \ " `( E! H, |$ {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. , A- T u/ a7 l6 Z ... 9 N4 n/ o: v$ k. J d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?% s# n6 k) J1 R& e1 \( a
ChiaPet 发表于 2011-2-18 09:09
8 Z+ V1 ]2 U. G2 W# T5 P! \Ask your builder to give you an exact quote.: C* F4 z8 U6 W" g
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.1 e, ?- N& \' }3 Z( w/ o, Y4 _
You don't have to upgrade all the windows. Only the important ones. / k/ L2 B! Z- b7 T小黄 发表于 2011-2-18 09:13