what is R factor? how do you have UV on the windows?- c# H' j- A1 C( q) n. f3 Z
ChiaPet 发表于 2011-2-18 08:53
! Y6 O8 x$ w" |( v- T1 f% eR factor is used to determine insulation capability. ) b9 U. e, {! K/ d' k A& R Y; u9 l$ J9 @
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.) ^9 l3 j# n5 C' E$ K
2 u4 u9 }; X- T& ^9 n) v- cHowever, 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 % @- A W2 o7 z( u
R factor is used to determine insulation capability. 6 z0 P* B! t& D6 `8 H' |( k$ k1 l4 [" M z( w( E% g
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. ' q. ] I% ~9 @2 A* a .... i9 s" D9 K) U5 L( d% ~6 J
小黄 发表于 2011-2-18 09:06
! s) o* a; r& d5 [Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much? 6 M$ e5 G% G! _ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote. + d; B$ B( F+ ^7 y7 oYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote., S$ m3 Y k) @
You don't have to upgrade all the windows. Only the important ones.9 Q$ h+ N7 W) c/ u! ?* C
小黄 发表于 2011-2-18 09:13