Have you noticed that a glass unit takes from 70 to 90% of the window construction? This is the main gate for leaking such expensive heat. Therefore decent, i.e. warm glass is: 32 mm (the wider the better) ...

If you have Africa in the winter, you can stay on the glass unit 24 mm wide, 2 glasses, 1 air chamber. Cheaper! But energy-saving glass is put in case of heating shutdown in winter.

TIP 2. Select a profile

What to look at? First things first, on the manufacturer. About China and Russia we will delicately keep silent.

All European plastics are produced in Russia and Ukraine, according to European recipes, on imported automatic and semi-automatic equipment. All of them are white, can be with a light blue, do not turn yellow. Everything is environmentally friendly, the notorious lead harms nature only by its production and disposal, it is absolutely harmless in the windows. The amount of lead in your windows is hundreds of times less than in your crystal.

We liked the manufacturer, we look at the width of the profile. 70 mm is optimal for our climate. The main difference of 70 mm profile from 60 mm in width of the mounting seam. Warm foam more in a wider profile. For thoose, who living in Australia, they are can check double glazed windows Melbourne cost, and compare them with others. You will see that the price in Australia is lower than in other countries.

Select the number of air chambers in the profile. Where they are, any manager in the sales office will show you. Here you can save, with the same width, the number of cameras does not significantly affect the merits of the window. Only if your house, drown it to you, or you have apartment heating, it is better to take 5 cameras.

Whoever does not listen to this advice and chooses a 58 mm profile, 3 cameras, look at least at the thickness of the front walls. It happens from 2.5 mm to 3 mm. For heavy window constructions 2.5 mm are not suitable, the welding seam is less strong, and the walls themselves will not withstand the load.

And then there is a bead. I saw a man who admired the round bead: “I like this one!”. It is said that someone falls in love with a bead.

I do not speak about the color profile laminated or tinted in mass, because it has nothing to do with practicality, on the contrary, colored plastics are weaker than whites against frost.

TIP 3. The choice of fittings.

Here it is simple. Fittings for you have already chosen, as an application to plastic, manufacturers of window blocks, who is what. Good fittings:

GU, ZIEGENIA-AUBI, Roto-NT

All of them are made in Germany. Automated lines produce many, many accessories for windows, Russia is a great market for Germany. Equipments of the same name in China can not be made.

TIP 4. Installation

Ask for installation according to GOST. This is: PSUL tape (vapor-permeable self-expanding) foam and insulation tape. Otherwise, over time, the foam will collapse, and in the cold will blow from all seams.

Excess foam cannot be cut off; after installation, a protective film is formed only once. Worry about good installers, they will not produce excess foam.

Assembly seams - the weakest place in a window design.

TIP 5. Alas, the main thing

Do not get into the garage production. There they will very cheaply assemble you a double-glazed window with adhesive tape, instead of sealant, at the very least weld a profile, and, at best, in 2-5 years you will definitely feel the difference with a neighboring normal window. Bona fide advice and flair can help.