what is R factor? how do you have UV on the windows?9 Y' b9 j4 @" ^) M5 S
ChiaPet 发表于 2011-2-18 08:53
; _. @0 @: ]5 w+ p( ], g6 mR factor is used to determine insulation capability. 2 g+ M: o: s# l1 ^$ Y: {2 R ; h& ]+ h: p; A2 }8 ] t4 T6 P5 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.9 f3 H% ?. L$ B9 Y& k5 \
8 R: l# ~! z3 t1 }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./ k5 |& Y. H; u! R' @* C
2 N) D4 t J) k7 s |: d- oHere 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./ w& `6 U H6 y& a" ~
... + g& q M# m# b4 ?% {1 f小黄 发表于 2011-2-18 09:06
, |6 P9 k3 E3 r+ x5 A' ZThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?1 a4 M1 n6 i! s% V
ChiaPet 发表于 2011-2-18 09:09
: k; O' {3 l s/ h* E. CAsk your builder to give you an exact quote.0 V; U& V5 Y6 Q, [; y0 `
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote. $ U% q m2 |1 H+ c& @You don't have to upgrade all the windows. Only the important ones.+ h6 H- p5 k7 S1 [! A+ {; M+ v
小黄 发表于 2011-2-18 09:13