what is R factor? how do you have UV on the windows? 3 r& T( l% S: K( m8 EChiaPet 发表于 2011-2-18 08:53
% l1 a2 N1 o6 M1 X! g, aR factor is used to determine insulation capability.3 F& z/ j _: v7 Q, Q2 N
9 W H. g2 ?9 O# eHere 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.) _4 u7 ~# n4 |( ~; D
4 t( L; B# B" c/ y! i( E3 VHowever, 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.! [" _* P" D; E X% L
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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. : T2 P! s& q2 E' N ...7 A" b% r% ^& K$ H6 e) U
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?* K! V/ g4 m5 a; v4 [) A1 H7 k1 T+ K
ChiaPet 发表于 2011-2-18 09:09
7 b2 Z* \3 g; X! x% f8 u+ k+ P, fAsk your builder to give you an exact quote. 1 H: }* g# Q; X: W9 V6 A3 L+ q, gYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. - I- G5 t% r2 q" G/ ?8 r& AYou don't have to upgrade all the windows. Only the important ones. 1 x( J# v. p3 B6 ]5 S小黄 发表于 2011-2-18 09:13