With the heat of the past few weeks, you prefer to keep the sun off your glazing as much as possible.

Yet not everyone is waiting for a pitch-dark work or living room.

To what extent is solar control glass a pleasant solution?

Where the commonly used High Efficiency Glass (for example HR++ or triple glass) is equipped with a special coating, the sun-resistant variant goes a step further.

Roy van Leeuwen, director of the Glass Knowledge Center: "A HR++ glass can often still allow 66 percent of solar heat to pass through, while solar control glazing has between 20 and 40 percent. Such a sun protection coating can make a big difference, especially if you use a lot of glass. your house, that is nice. And certainly if your balcony or garden is on the south. You will notice the difference with the weather of last week."

Milieu Centraal provides various tips about glazing online.

For example, you can find out how much energy and money you save with HR++ or triple glass (note: triple glass does not fit in all frames).

Such glazing keeps heat in and therefore works very well as insulation in winter.

If you want to dispel the heat, keep your windows and doors closed during the day and let everything air out at night, advises Pim Nusselder, spokesperson for energy at home.

Disadvantages of solar control glass in winter

Solar-resistant glass helps to keep out heat, but Milieu Centraal has a caveat.

After all, the ZHR++ glass, as the material is often referred to, also blocks the sun when your house can use the heat well.

In winter, a solar control coating can therefore lead to a higher energy bill than normal HR++ or triple glass.

The same applies to solar control foil, which can sometimes be a handy solution for monumental buildings.

Nusselder adds a newer development to the latter: vacuum glass.

"This is especially suitable in monuments, because the rebates there are often too narrow for a thick glass package. Vacuum glass is only 8 millimeters wide and insulates very well. In the future, this could also become interesting for more modern homes."

ZHR++ glass also blocks the sun when your house can use the heat well.

ZHR++ glass also blocks the sun when your house can use the heat well.

Photo: Getty Images

If you prefer to go for a foil, the Glass Knowledge Center has an extra point to keep in mind.

"It is possible that the surface temperature of the glass becomes higher with such a foil," says Van Leeuwen.

"That can affect the durability of your glass, especially if you decide to only cover part of it. Such a temperature difference can be harmful. In such cases, the warranty on your glass could become void. So pay close attention what is guaranteed by the foil supplier and what is not guaranteed by your glass supplier."

Discoloration of the glass due to coating

So much remains to be done on your own considerations. Van Leeuwen also warns about another well-known point of attention for solar control glass. "The coating can cause discoloration," he says. "The more heat you want to block out, the greater the chance that your glass will get a different color. Those differences can be quite large. To put it in an exaggerated way: it looks a bit like looking through sunglasses. look at what you get."

"Sellers work with glass samples," explains Van Leeuwen.

"Then you get a piece the size of an A4. They work quite well in themselves to be able to put them side by side. To compare them, you can view them from different angles. But if there is a possibility, ask For example, also to a glass supplier or there is a reference project in the area. Then you can see how everything looks in real life."

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