Did you go with wood, fiberglass or vinyl windows?
whaas_5a
8 years ago
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Are you happy with your vinyl or fiberglass windows?
Comments (18)The argument that one spacer system is inherently superior to another or all others  is ripe with the possibility of misinformation, misunderstanding, and certainly a great deal of emotionalism. Each system has its proponents and its detractors. SuperSpacer uses an organic as the primary moisture and gas seal. It uses an acrylic as the primary structural seal. Unlike other systems, SS is "backwards" in that it places the structural seal inside of the moisture seal. The primary structural component of SuperSpacer is silicone - which is neither moisture nor vapor resistant, so the silicone is wrapped with a moisture barrier to prevent air and other gasses from passing thru the silicone. Does this make SS an inferior product? Nope, not in the leastÂactually SS outperforms every other system on the market in energy performance numbers. What EdgeTech (makers of SS) does really well is market their product (for example "Health Smart Windows" is primarily a marketing tool). They have what may be an excellent product, but they also have a marketing program that totally kicks butt! They have opened areas of discussion that really didnÂt exist prior to their introduction of itÂthey have emphasized SSÂs inherent advantages while ignoring any potential disadvantages (which is what marketing folks do, of course). They have "invented" new ways to categorize window spacer systemsÂheck, they have introduced IGU spacers to the general public. For an example of longevity, EdgeTech advertises that their system goes 80+ weeks in a P1 test chamber (a standard for testing dual pane windows). They advertise that the "Stainless Steel" systems go 40+ weeks in the P1 chamber. What they donÂt advertise is exactly how long is the "plus" in the 40+ weeks of the "metallic" systemsÂhow about 80 weeks for a PIB / silicone dual seal stainless steel spacer system. By the way, at 80 weeks or so the glass begins to break down and the seal tends to be lost at that point because of glass rather than spacer issues. The hot melt systems used with the SuperSpacer system also have a very specific application temperature range of about 275º  325º. If the applied material is outside of this range, then the P1 chamber testing can be significantly reduced  to as little as two to three weeks to seal failure. What happens in the field in this case? Only time will tell. Am I slamming SuperSpacer? Nope, not a bit. When manufactured to strict quality control standards and exactly as specified by the manufacturer, then SuperSpacer really is a very good, even superior, product. Energy performance and durability are what these things are ultimately about. How do different systems compare? As I mentioned, SuperSpacer is on top  at the edgeÂand TPS is second, by about ½ of a degree or so. The Stainless Steel systems (there are a couple of different ones) tend to be about a degree or so lower  about equal to Swiggle (again, at the edgeÂthe difference may not have much of an impact on the overall U value depending on the construction of the window). Drop another degree or so to Intercept and about another 8º for an aluminum spacer. Using a LowE coating will have more of an effect on the overall window temperature than does the choice of one of the "warm edge" systems. Of course using a LowE coating with SuperSpacer and with Swiggle still keeps SS a couple of degrees warmer at the edge. BUT, these are also ratings of the "raw" IGUÂwhat happens when the unit is in a frame? Well, how about this for thought: Conclusion The thermal resistance of the spacer bar material influences the glass temperature at the edge-of-glass region of an IG unit. Based on the limited testing performed at IRC and computer modelling at EMPA Switzerland, the spacer bar with the highest thermal resistance shows the warmest glass temperature on the warm side and the coldest temperature on the cold side of the glass at a distance 5 to 60 mm from the edge of the IG unit. But the effect of the type of spacer bar on the overall thermal resistance (and tote heat loss) through windows depends heavily on the window design and material. Therefore, the full impact of thermal characteristics of the spacer bar material on the thermal resistance and the condensation resistance of a window should only be determined by testing complete window assemblies. Interesting concept  testing complete systems....See MoreFiberglass or vinyl windows ?
Comments (15)Lars, What fiberglass window would you therefore recommend? If upstate NY has 80mph winds and you keep referencing the water wind speed, by your logic, you would have to specify a window that is a DP80+ to keep out water at the wind speed your are referencing. A DP30 window is structurally sound to 134mph of wind and a wind driven rain of (water test pressure) of 42mph. At 43mph, it does not mean that water starts pouring through the window, it means that some of the wind driven rain is getting past the seals. The Marvin may, actually have a better water test pressure number but being that DP, Structural, and Water are all related, DP is limited to the lowest of the 3 numbers. Please post up the air infiltration numbers that you say are so horrible for the Marvin. Pdf's of the data would be nice. Glazing by elevation is great if you are designing a home and your architect knows what he is doing. Most homes are not designed to effectively take advantage of different options in glazing characteristics....See MoreNew construction windows - Boston area, vinyl, fiberglass or wood
Comments (1)If you are looking at the narrower side of the spectrum in terms of vinyl, the glass loss will be negligible. Do you have storm windows? If so, a narrow profile window will likely fell larger....See MoreVinyl or Fiberglass Windows?
Comments (21)In response to the original question, it really depends on your priorities for the project as well as your location (severity of your climate). The vinyl "expansion" issue as well as the "strength" is mostly propaganda. Here in WI we have vinyl windows in service that are airtight at 5 degrees below zero, and operate smoothly at 95 degrees on the sunny south side of the home. There are vinyl windows that have vastly superior ratings both thermally and structurally to Marvin. With that said, I don't think that there is a product in Marvon's entire lineup that is not well designed and manufactured, they simply aren't on the leading edge as far as energy efficiency is concerned, and again, I'd be careful about the weight given to expanision and strength talk. Based on your location, you won't likely have access to many of the better performing windows that are found in colder areas of the midwest and northeast (Sunrise perhaps), so something like the Essentials certainly rates higher on the list under those circumstances as a "vinyl alternative"....See Morewhaas_5a
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