Alside Excalibur vs. Sheffield?
We are going to use Window World here in KC to replace some windows. Our branch here has a stellar reputation. So far, everyone I've talked to has had good or great experiences, including a friend who has used them three times.
Besides that, it means that we have two window choices manufactured by Alside, the ComfortWorld 4000 (Alside Excalibur) and the ComfortWorld 6000 (Alside Sheffield). There's a lot of good and bad comments on this and other forums about both of these. In recent years, it seems that nobody likes the windows because they are provided by WW. However those same people like the windows if you look a year or two before WW got big. So, ignoring WW and assuming a "perfect" install, which one would you go with? I'm struggling to decide, but the decision will be for all windows in the house. The 5 windows we are doing now are roughly 34" x 74".
The 4000 (Excalibur) is $325 installed w/ low-e/argon, half screens, etc. The 6000 (Sheffield) is $345 installed w/ the same options. The only difference is the frames. Frames seem to be made from same vinyl.
Here's what I've found out:
- pros: more modern design, true sloped sill, shows much more glass, .32 to .30 U factor, .21 SHGC, .49 VT, air infiltration at .12. ER rating of 11/12. DPF of 50 at 36" x 72".
- cons: not as many chambers for insulation, seems lighter weight, less weather stripping areas, possibly thinner extrusion (no actual documentation on the vinyl thickness)
- other: was redesigned in 2004 to be stronger, alside's most popular window
- pros: heavier duty, more insulating chambers, lower U factor .29, lower SHGC at .19, seems stronger. DPF of 50 at 36" x 72".
- cons: snap-in sill (how bad is this), old but reliable design loses about 3" more of window vertically due to thicker frame, lower VT at .40, worse air infiltration at .18 - .19. No ER rating. My smallest window (30" x 34") would look really clunky due to loss of glass, but I've only got a couple smaller windows.
- other: the same as a ultramaxx with an improved sill design
- other other note: according to their test data, both windows weigh about the same overall? The Sheffield's bottom sash weighs one pound more. I guess that could be all the additional vinyl?
So, I'm a little stuck. The Excalibur's cut-away looks somewhat similar to the cut-away for a Soft-lite Imperial LS, sans foam insulation. Sheffield's definitely an uglier window. However, I'm in Kansas City and on a hill. We get pretty good wind burst up around 80 mph in bad storms, and our temps range from normally the mid-teens in the winter to the mid-90s in the summer. This summer's a special case (18 100+ degree days).
So, which way would you go? If I went Excalibur, what would my worries be in 10 years or 15 years? What about with Sheffield? What worries would I have to look for in general? Thanks for the guidance.