How to measure plastic windows: rules and instructions

In order for the metal-plastic structure to fit perfectly into the window opening, you need to correctly measure the plastic window. There are specific instructions, strict observance of which guarantees a positive result. You can do it yourself or call a window measurer.

Basic steps for correct window size

Would you like to measure all the necessary parameters yourself? Follow the instructions described in the article and correctly measure the windows yourself:

1. Measurement is carried out both outside and inside the building.This allows you to calculate the depth of the opening and make sure that the product has the desired parameters.
2. Some openings have ledges, also called 'quarters', as their size is ideally 6.5cm (which is ¼ of a standard brick) - bear this in mind.
3. With distortions, the size of the product determines the larger indicator of width. After that, the indicators obtained must be checked with the internal parameters of the window opening.

Consider the first case, how windows are measured when there is a "quarter".

Measurement of the window for the opening with a "quarter"

It is necessary to take the first measurements from the outside of the wall. It is necessary to measure both the height and the width of the opening. According to the installation rules, the window should be mounted so that the brick goes 1.5-2 cm beyond the profile. We measure the width in quarters and add 3-6 cm.

IMPORTANT! The PVC product should be wider than the parameters of the quarter opening, since the window will be installed with an emphasis on the slopes. Therefore we add 3-6 cm to the actual distance between the extreme points of the quarters. Make sure that the measurement of plastic windows is correct and the future PVC structure can enter the window opening.

To determine the height, it is sufficient to measure the distance between the upper and lower edges of the opening and pull back 2 cm for the assembly seam. When mounting an ebb and a window sill with a plastic window, the measurer subtracts another 3 cm from the initial indicators for mounting the supporting profile. The window is 7 cm smaller than the original window opening. Before installation, check the measurements several times and make sure that the data obtained is correct. It is better to measure the same thing several times than to mask the flaws with curtains.

Measurement of a window without "quarters"

It is necessary to measure the dimensions of the future window in the absence of quarters, taking into account the following features. When calculating the correct width of the future frame, you should first measure the width of the opening. If the walls are uneven, the distances should be measured on the sides (at the top and bottom points) and in the middle. We subtract 2-4 cm from the lowest obtained value, leaving a gap for the assembly seam.

The height is calculated in a similar way. First we measure the distance from the bottom of the opening to the top. From the obtained value we deduct 1.5-2 cm of the assembly seam and 3 cm for assembly of the carrier profile.

ATTENTION! Measurement of metal-plastic windows is carried out quickly and correctly by specialists. For example, you can call a surveyor and get professional advice while saving time.

If you already have windows, and the edges of the window frame are visible, as well as the assembly seam, then it is enough to take measurements along the edges of the already installed structure. This method is suitable for installing windows of the same size without changing the original opening.

On your own or with the help of professionals?

After reading our recommendations, you can measure the opening of a plastic window yourself. However, if you have decided to buy REHAU windows from us, you can make it easier for yourself and order a free measurement. That way, you don't have to waste time determining the size of the opening. Our expert measurer knows how to correctly measure the parameters of windows with or without quarters. You can order REHAU windows and find out the exact price by calling the telephone number given on the website. We work in 24 regions, have branded stores and outlets in more than 120 settlements.