Recently, there have been ridiculous recriminations about the supposed benefits of window films that will outperform double glazing. There are supposedly five reasons why the film is "better than the good old double glazing"
1. "It's cheaper than buying new windows" and "If the double glazing is broken, you have to replace the entire window". (I said it was laughable.)
2. The installation of new windows "consumes valuable time". (That's a reason?)
3. The installation of new windows "requires the workmanship and materials" and the application of the film is done in the same way as the application of the film LowE and "provides a much higher level of insulation by 92% ". (Whatever that means.)
4. "Double glazed windows can insulate your home during the winter, but … they do very little to keep the heat". This must surprise the millions of people in Europe and America who are very efficient in the summer.
5. A website says "it takes more energy resources to make double glazed windows than film." (And your point is?)
Five very good reasons to have a laugh, but there is a serious side to unfounded allegations. For those with limited knowledge of gain coefficients and U-values (and that is most people), some of these factors will try to divert their hard-earned money to products that only delay real solutions. . superior performance can only provide evidence from independent testing laboratories and ignore (if they even know) that it is now possible to install genuine units in existing windows.
There are no extravagant claims for retro-editing as for new windows. Any search on the net will find reputable companies that can adapt to standard CGUs without the need to replace the entire window and without putting another window on top.
Here are the facts and all these solutions will work quite well, but with a variety of disadvantages
1. The new windows offer the best performance. The biggest disadvantage is the cost.
2. In most cases, the IGUs to be mirrored are the performance closest to the new windows, depending, to a certain extent, on the age and condition of the existing windows. The limitation is that the small panels are not viable.
3. Secondary glazing means equipping another window and should not be confused with the double glazing. The biggest drawbacks are clumsy operation, cleaning problems and the devaluating effect on the property.
4. Putting plastic sheets on the windows can not really be called double glazing. With all the disadvantages of secondary glazing, they lack aesthetically and the plastic has a short life before the scratches make it unacceptable.
5. All solutions must use the right glass to adapt to the situation to maximize performance.
All of these solutions are available to the average homeowner who has problems with energy, condensation or noise. What you spend, however, does not necessarily reflect value for money. For example, installing new windows, while providing the best results, will cost 3 times more than just replacing the glass, but for this you get the extra performance of 10%.
At the other end of the scale, or the polycarbonate sheet is so expensive that the cost is up there with secondary windows, but with the added inconvenience.
Laugh outrageous and unfounded claims about super movies, but you still need to do your homework to find the right solution for your budget.