what is R factor? how do you have UV on the windows?3 v G( L3 T# l+ n R% U
ChiaPet 发表于 2011-2-18 08:53
) ]9 C B# f+ V+ T
R factor is used to determine insulation capability.* ]: b( e- z& W# ]1 ^1 g# b' M6 M
" D( _9 M9 X/ s3 {$ g# b8 b% 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. 7 P6 U, i0 Q! ^4 H6 X : Y' ]1 x9 I! h* v( {. DHowever, 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. 4 l$ X$ ]' ] Y( _0 @9 L$ t7 j4 c/ C' n3 P$ v. |
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.' P; P) ?0 Z/ O: [0 {
.../ M( r. ]- }. w1 |2 G# j
小黄 发表于 2011-2-18 09:06
9 {! ~8 }* ~0 i' b3 GThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?* k1 i' t& K8 b0 ^/ s8 N$ c ^
ChiaPet 发表于 2011-2-18 09:09
1 G5 y9 z8 Y1 _+ Z! {+ v& C1 w
Ask your builder to give you an exact quote. P, F" w1 F7 jYou don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.: b) i% W* R& ~, _" z/ V) B/ E& L
You don't have to upgrade all the windows. Only the important ones. & V- D, q5 Q% c* w- [( ?' t7 W小黄 发表于 2011-2-18 09:13
: z* F f$ h+ K% l
d* \) s3 T4 G* a8 [9 ?. O2 Q
it must be one of the best, get lot of sunshie, summer may be a little hot, but winter it will be so marm.