The process of obtaining the dimensions of a plastic window depends on the presence and type of window in the opening. This means that measurements can be made if:

• thae window opening is empty;
• plastic windows are replaced.

Replacement of old plastic windows

To calculate the dimensions when replacing old uPVC windows with new ones, you need to do the following:

• measure the height from the bottom to the top groove of the glazing bead (h1);
• calculate the height of the profile to the groove of the glazing bead (h2);
• then we do the following calculations: h1 + (h2x2). The resulting number is the height of the plastic window.

What is the reason for this? Because part of the upper profile of the window is embedded in the slope and is not visible. Using the same principle, we calculate the width of the plastic window.

Opening an empty window

If the window opening is empty, obtaining window measurements depends on the presence or absence of quarters.

Window quarters are protrusions of parts of the external wall in the window opening, which prevent moisture and direct sunlight. They can cover the side, bottom and top of the opening. Usually, a quarter window is used to increase the level of heat and sound insulation, to avoid the formation of condensation on slopes and in double-glazed windows. The width of the projection of the window opening is 3-4 cm, which is a quarter of a brick.

This is what a quarter window looks like in an empty window opening.

To make the correct measurements, a person needs to know how to correctly calculate the width and height of the window opening when there is a quarter window and when there is none.

The height of the window if there is a quarter at the top of the opening

The process of calculating the height of a quarter opening consists of several steps:

1. We measure the height of the opening outside the window from the quarter at the top of the window to the bottom of the opening. Let this height be 1500 mm.
2. The height of the opening inside the room is calculated between the bottom and the top (without a quarter) of the opening. Let it be 1600 mm.
3. To calculate the required height, we start from the height of the window opening (1500 mm). We subtract from it the height of the load-bearing profile (30 mm) and the height provided for the technical gap between the bottom of the window opening and the load-bearing profile into which the foam will be blown (10 mm).
4. To the sum obtained, we add the height of the quarter (40 mm) and subtract the technical gap between the quarter and the window (20 mm), where the foam will be blown out, because the window will be driven under the quarter.

As a result, we have the following equation:

1500 - (30+10) +(40-20) = 1480,

where 1500 is the height of the opening outside the window, including the upper quarter,

30 mm - height of the stand profile,

10 - technical clearance at the bottom of the opening;

20 - technical gap between the window and the upper quarter.

The height of the window in the presence of quarters at the top and bottom of the opening

We start with the height of the opening behind the window between the upper and lower quadrants. Let it be 1400mm. To calculate the height of the window, you must:

1. From the height of the opening behind the window (1400 mm), subtract the distance that will be used to install the drain (20 mm).
2. To this amount, add the distance that will be used to make the window a quarter. It is calculated as the difference between the height of the window quarter (40 mm) and the technical gap between the window and the quarter (20 mm) into which the foam will be blown.

As a result, we get the following equation:

1400 - 20 + (40-20) = 1400,

where 1400 is the height of the opening behind the window between the quarters,

20 - distance to the drain installation,

20 is the distance at the top of the opening that the customer uses to move the window a quarter.

Window height without quarters

We start with the height of the opening behind the window between the upper and lower quadrants. Let it be 1400mm. To calculate the height of the window, you must:

1. From the height of the opening behind the window (1400 mm), subtract the distance that will be used to install the drain (20 mm).
2. To this amount, add the distance that will be used to make the window a quarter. It is calculated as the difference between the height of the window quarter (40 mm) and the technical gap between the window and the quarter (20 mm) into which the foam will be blown.

As a result, we get the following equation:

1400 - 20 + (40-20) = 1400,

where 1400 is the height of the opening behind the window between the quarters,

20 - distance to the drain installation,

20 is the distance at the top of the opening that the customer uses to move the window a quarter.

The width of the window with quarters on the sides of the window

We follow these steps:

1. We measure the width of the opening outside the room between the quarters (1500 mm) and the width of the opening inside the room (1600 mm). To calculate the required width, we start with the width of the opening outside the window (1500 mm).
2. To the outer width of the window (1500 mm) we add technical clearances on the sides of the opening (20 + 20 = 40 mm), where the foam will be blown out in order to activate the window in quarters.

As a result, we get the following equation:

1500+(20+20)=1540 mm,

where 1500 is the width of the opening outside the window between the quarters;

20 + 20 - distances for winding the window into a quarter.

The width of the window without quarters

To measure the width of the window without the presence of quarters, we do the following:

1. We measure the width between the right and left sides of the opening. Let this value be equal to 1500 mm.
2. From this width (1500 mm) we subtract the distance to the technical clearances on the sides of the opening (10 + 10 = 20 mm).

As a result, we get the following equation:

1500 - (10 + 10) = 1480, where

1500 - width between the right and left sides of the opening;

10 + 10 - technical slots on the sides of the opening where the foam will be blown.

Measurement principles

When taking measurements, the following rules must also be observed:

The height of the window, load-bearing profile, technical gap and quarter can vary depending on the type of walls of the house (panel, brick, wood), the owner's desire to insulate the window.

• The width of the supporting profile is from 30 to 70 mm.
• Quarter height - from 30 to 65 mm.

In the case of obvious curvature of the window opening, the width and height of the opening should be measured in several places, after which the average value is used for calculations.

Measuring the window yourself

After reading our recommendations, you can measure the opening for mounting the plastic window yourself. Then, having the necessary window dimensions, you can order plastic windows online in a few simple steps. The windows are delivered to any place in Poland.