Screens are an additional price in all window companies software as well as additional in the price book. It is considered on option from EVERYONE although 99% of the time they are ordered. It is an option because they have many types of screen mesh material as well as frame material options beside aluminum.

You are looking at three product materials with different pros and cons. I can say that each product that you've seen is highly regarded, but for very different reasons. You will want to assess your priorities for the project to determine which is the best fit. All are well made quality products. -Performance? -Appearance? -Cost? -Value (very different than cost)? -Warranty? -Longevity? -Option content? -Perception by others (including guests and/or future buyers of your home) If I could make a chart, the Okna would skew toward performance, value, cost, and warranty, the Ultimate toward appearance, perception, option content, and the Integrity/Infinity as somewhat of a bridge between the two. Not as good in the "good" areas of each choice, but not as bad in their weaker areas either. Whether that makes it a "glass half-empty" or "half-full" proposition depends on your perspective.

The Okna EnviroStar actually looks like a wood window when its installed. Many homeowners who live in older ( higher end neighborhoods) tell me they have an aversion to cinyl and demand wood. however, when i show them the Okna EnviroStar you would be shocked to find how many turn the corner and its never just based on price. its the performance as well as structural advantages of a higher end vinyl such as the Okna and last but not least, no maintenence. the EnviroStar is one of only a select few of higher end brands that can actually maintain or even enhance the integrity of a Tudor or older home. as a side note, you may want to request seeing the okna with antique brass or brushed nickel hardware. its a real head turner.

Please tell me what other aspects that I "side-stepped"? You posted about IGU failures and I posted the warranties relative to that from Andersen and the manufacturer (Okna) that you reference in your link back to another forum. The 20 year or lifetime reference was something that you pointed out. What am I missing? Do you wish to read the entire warranty? Here it is: Vinyl Frame And Sash Members The vinyl extrusions and vinyl components used in the windows and doors are warranted to be free from defects that might result in blistering, peeling, flaking, corroding, and fading of the window or door for as long as you own your home. This war- ranty is fully transferable to the next homeowner.  Factory painted standard or custom colors are warranted for a period of ten years. Insulated Glass OKNA Windows Corp. warrants that the insulated glass units, including internal grids, will be free from obstruction between the glass, including film formation, including moisture on the internal glass surfaces caused by seal failure and including small marks, dust, and scratches. This Warranty is fully transferable to the next homeowner and covers glass imperfections as de- scribed in Federal Government Glass Specification DD-04516.  Condensation may occur on interior and exterior of windows as a natural result of humidity within the house or build- ing area and changes in outside/inside temperature. This does not indicate a manufacturing defect and would not be included in this Warranty. Hardware OKNA Windows Corp. warrants that the hardware shall remain in good operating condition, for as long as you own your home. Warranty on hardware is also fully transferable to the next homeowner.  Specified Metal hardware for coastal applications is limited to a ten year warranty. Exclusions and Limitations The following are excluded from coverage under this Warranty: A. Any damage caused by wind, hail, lightning or other acts of God, intentional acts, accidents, negligence, or exposure to harmful chemicals or pollutants. This warranty excludes damage related to harsh or corrosive cleaning products, application of paints ( non factory applied ), and uniform fading or color change due to weathering. B. Any damage or malfunction caused by improper handling or installation of the windows, or any damage to the windows or components of the windows caused by settlement or structural defects of the building in which they are installed. C. Any defect, malfunction or failure to perform, which has occurred because of unreasonable use, improper application or failure to perform reasonable or necessary mainte- nance - see section " Maintenance & Cleaning." D. Any window, which has been repaired or attempted to have been repaired or modified by any person other than an authorized representative of OKNA Windows Corp. E. OKNA Windows Corp. liability is limited solely and exclusively to repair or replace, at the discretion of OKNA Windows Corp. and under no circumstances will OKNA Windows Corp. be liable for incidental or consequential charges such as, but not limited to, labor cost for any purpose, inconvenience, damage, or injury to persons or to property or any other expense. Procedure And Conditions Of Warranty Remedy The Owner must notify the Dealer/Distributor within thirty days after the defect has first appeared. OKNA reserves the right to inspect any window or door that a warranty claim has been made. Such notification must contain the following: A � Name and Address of the Owner. B � Date of Installation. C � Description of the Defect. If a product meets requirements of this limited warranty, OKNA Windows will at its option, supply replacement parts or product. Labor or reinstallation costs are not covered by this limited warranty. Commercial Application OKNA products installed in a building operated as a multi-family dwelling or used for commercial purposes or rental properties such as schools, churches, apartment complexes, government owned structures, etc. will limit this Warranty to ten years. Product Changes OKNA Windows Corp. reserves the right to discontinue or change any of its products or the parts utilized in any of its products at its sole discretion. If any window product or component originally installed in the building is not available at the time of any claim by you under this Warranty, OKNA Windows Corp. reserves the right to substitute any other model or component as a replacement. During warranty period replacement parts will be supplied at no charge to dealer upon return of defective part. Maintenance & Cleaning A mild solution of household cleaner such as liquid dishwashing detergent may be used to clean windows. Do not use harsh abrasives. This Warranty shall be null and void if harmful solvents are used. You are referencing "pressure equalization" and I reference that in the other post that you made. What additional scientific developments do you think need to happen. Is the fenestration industry going to "UN-INVENT" the law of partial pressures? There is no development needed in "pressure equalization" just better and better sealants and gas impermeable sealants to whatever the inert gas fill is. Andersen learned a valuable lesson with this and did a fine job of warrantying items after the fact when it was discovered that their IGU were gas fill permeable but impermeable to the larger molecules of atmospheric air. There is not much science to develop here. While vacuum IGUs are interesting and exciting developments, they are several years away from reaching mass distribution and acceptance. If you think that gas permeability presents challenges, vacuum presents far more challenges. Temperature shifts do present sealing issues to IGUs but if we can make sure the windows inside pressurized airplanes and vehicles that go outside the earth's atmosphere stay together, something in Desert Valley doesn't seem that tough. In applications where windows go above a certain altitude, breather tubes are inserted for equalization if they are not made near said altitude. The are certain aspects of the window industry that are pretty tried and true and I am not sure you layman's review of their cycle testing is accurate or based in any observable fact. I have been through several factory were they life cycle test these materials and they are comprehensive to say the least. No laboratory can ever truly duplicate a real world environment but they compensate for this most times by making the extremes more extreme to simulate worst case scenarios. The engineers at Pella, Andersen, and Cardinal would probably take umbrage with your less than factually vetted review of their testing and materials developments. Do they have failure rates, surely. This is why you get a warranty. Even in those situations where materials are manufacturer robotically, there is a human hand and potential for error at any number of locations in the process.