How to calculate the number of wallpapers per room?

The wallpapering process is not as easy as it seems at first glance. In order to qualitatively and beautifully glue the room with roll wallpaper, it is necessary to make the correct measurements. On their basis, it is already easier to make accurate calculations of the required amount of wallpaper.

In order for the gluing process to go smoothly and without "unnecessary nerves", as mentioned earlier, everything must be measured and calculated in advance. Otherwise, you may get a "surprise" in the form of a bare spot on the wall with a missing piece of wallpaper, or, conversely, there will be too many rolls.

For example, you can take an ordinary room of standard sizes, for example, it has the following footage: the height of the walls is 2.5 m, the width of the room is 3 m, the length is 5 m.

The first thing to do is, armed with an ordinary tape measure, find out the length of each wall. Then we add the known values ​​on paper: (3 + 5) x2 = 16 m - this is the perimeter of the room being measured.

Next, you need to measure the width of the wallpaper (usually, these parameters are written on each roll, the standard width is 0.5 m). The resulting number of the perimeter of the room is divided by the width of the wallpaper, that is, 16 m: 0.5 m = 32. This number shows how many strips of wallpaper are needed for the room.

The next value that will be needed when calculating is how many strips will be obtained from each roll in order to find out their number later. A standard roll has a footage of 10, 25 or 50 meters, but if a non-standard roll was purchased, where fractional values, then for ease of calculation we round to an even number. We divide this length by the known height of the room wall. It turns out 10 m: 2.5 m = 4 - so many stripes will be obtained from one roll of wallpaper.

The only thing left is to find out the exact number of rolls. To do this, divide the number of strips required for the entire room by the number of strips in one roll. 32: 4 = 8 - as many rolls are needed to completely cover the selected room.

Craftsmen, in turn, advise you to buy one more roll of wallpaper, since there is always a chance of making a mistake or accidentally spoiling several strips, and in order not to run after the next bundle of the desired wallpaper (which may no longer be in the store) , it is better to always have a little in reserve. It will also always be possible to replace the damaged fragment with children or pets.

A very important process before directly pasting the walls with wallpaper is thorough preparation, since during this process a certain number of auxiliary tools and improvised means will be required.

The very first item that you can't do without is an ordinary pencil, they will need to mark the deferred length on the wallpaper. It can be either special construction or ordinary.

Of course, you can't do without a long ruler or a construction tape. With their help, the parameters of the room (length, height, width) will be measured, and the wallpaper roll will be ruled. It will be difficult and time-consuming to measure the room space with a ruler, so for these purposes it is better to use a tape measure, and with its help, in turn, it is difficult to draw straight lines on a sheet of wallpaper. In this regard, it is better to take both.

To cut the canvases into separate sheets, a clerical knife or sharp scissors will come in handy, but I advise the master the first option, since it is easy to use it to make cuts or slots for sockets and wiring. It is also easy for them to give injections when they need to release air bubbles, but here it is wiser to use a needle, it will turn out more accurately and invisibly. In turn, scissors are useful for cutting out some "curly" parts, where clarity and smoothness of lines is required.

You will definitely need a screwdriver to remove the protective bulging box from the switches or any other fixings on the wall.

Since the walls and corners in the house are not always perfectly even, and the pattern on the wallpaper is present, the building level will come in handy. With its help, it will be easy to glue the strip so that both the pattern and the corners are not "crooked".

You will need two containers, one for water, and the second will mix the glue. Water is needed to wipe off accidentally dropped drops of glue with a cloth, if you quickly wipe it off, then there will be no traces.

If we talk about a rag, then it must be clean and soft (wet wallpaper is easy to crush and damage). It is very important that in the process of wiping off excess glue, it is damp, but not wet, otherwise the wallpaper may soak in moisture and simply slide down the wall.

In order to qualitatively mix the glue solution, you will need a construction mixer or an ordinary wooden stick, which will have to mix the ingredients for a long time and with high quality. Masters advise to pour out the glue not all at once, but in parts, so it will turn out to make it more uniform and without lumps.

In order to apply the adhesive evenly and quickly, it is best to use a roller or a wide, medium-hard bristle brush. As for the roller, it should have a small pile.

A very convenient fixture for gluing is a paint bath. It has a recess for solutions and a ribbed surface with a bevel (so that the excess flows back). It is good to pour glue into it in small quantities, dip the roller there, and remove the excess by scrolling it on the ribbed side. It is very important that its size matches the width of the roller, otherwise there will be no effect from the bath.

A good assistant in getting rid of trapped air under the glued wallpaper cloth will be a wallpaper spatula. The main thing is that it is either rubberized or plastic, otherwise the metal can crush or break the still wet, not dry strip. It "expels" not only air bubbles, but also excess glue, which must be wiped off and removed immediately.

For places such as joints between strips, there is a special roller. It is made of rubber or silicone and is shaped like a small round barrel. It is very convenient for them to push through the joints without causing damage or deformation to the wallpaper. There is also a special roller for corner contacts of the surface with the wallpaper - these are places near the ceiling, near the floor or in the corners of the room. Due to its flat shape, it is easy for them to push through all the corners so that the strip holds well.

Of course, do not forget about the electrical tape. With its help, you need to glue over all the "bare" wires, which will later serve to install the socket and so on.

Of course, the above list can be supplemented with all sorts of newfangled devices, but this is enough for high-quality gluing of wallpaper.

As mentioned earlier, without accurate measurement of all three basic parameters of the room, it will not be possible to calculate the exact number of wallpaper rolls. This is especially true of the case when you need to paste over not one room in an apartment or house, but several.

To make it easier to visualize, you will need to draw a general schematic plan of the room. To do this, you will need a pencil, a ruler, and a simple sheet of paper. You will also need a tape measure with which to measure space.

Having schematically indicated the walls and the location of the windows on paper, it is necessary to sign such quantities as the height of the walls, the width and length of the room itself. Then specify the window parameters in order to subtract them from the total footage, since they do not need to be pasted over.

Next, we find out the area of ​​each wall and add it together to find out the total number. To do this, we multiply the height by the width. Let's say that this space is 2.5 m high, 3 m wide, and 4 m long.

We find out the area of ​​the first wall: 2.5x3 = 7.5 sq. m. Further, we multiply this number by 2, since there are two such walls - they are opposite. 7.5 sq. mx 2 = 15 sq. m - 2 walls in total. We do the same with the other two. (2.5 mx 4) x 2 = 20 sq. m. Add up the obtained values ​​- 10 +15 = 25 sq. m - the area of ​​the entire surface of the walls in the room.

Do not forget about the surface area of ​​the window to be subtracted. First, it must be calculated in a known way. Let's take the dimensions of an ordinary window - width 1.35 m, height 1.45 m. 1.35 x 1.45 = 1.96 sq. m. The obtained result is subtracted from the total surface area of ​​the walls of the room - 25 -1.96 = 23.04 square meters. m - the area of ​​the glued surface of the walls.

Any room has an entrance door or passage, which is also not a surface; it does not need to be pasted over with wallpaper. In this regard, the surface area of ​​the door and the entrance space itself must be subtracted from the above obtained total wall area. An ordinary door with a transom is 2.5 meters high and 0.8 m wide. 2.5 x 0.8 = 2 square meters. m (the area of ​​the door with a gap from it to the ceiling).

Subtract the calculated area from the total - 23.04 - 2 = 21.04 sq. m.

From the result obtained, using simple mathematical calculations, you can find out the number of required rolls of wallpaper for the room, knowing the coverage area of ​​one roll.

There are also rooms that have a non-standard layout, but the calculation must still be carried out. To be 100% accurate, even in a room of standard sizes and parameters, the walls are not always even and they must first be leveled, otherwise the ornament or pattern on the wallpaper will be difficult to fit over the entire surface of the walls.

Unusual surfaces include walls with rounded corners, or when the wall itself is in the shape of a semicircle. There are rooms where the walls are rounded towards the ceiling and have a domed upper part. There are also protrusions or partitions that divide the space into zones and so on.

To determine the number of wallpaper rolls, you will still have to calculate the area in this case. Masters advise to "cut" the space into convenient shapes (square, rectangle). For this, the width of the wall and its height at the highest point are taken and mentally connected into a rectangle. Rounded triangles will remain at the corners, which are also divided into squares. Later, all the sums of the areas are added up, and the total area is obtained.

But many "seasoned" upholsterers say that it is not necessary to calculate so thoroughly.

If the wall has the parameters of an ordinary rectangle, but is convex in the form of a Russian letter c, then its width is measured using a tape measure, which must be pressed tightly to the surface. The height will be normal, without any problems or changes. And then the area is calculated according to the well-known formula.

In the case when there are convex details or certain structures on the wall (for example, a pipe from an exhaust hood, which was covered with rectangular sheets of drywall or PVC), then its area must also be calculated and added to the total surface. It is good when it has a clear angular shape, like a square or rectangle, but if there are rounded parts, then it is also better to calculate them, as well as "correct" figures, and then remove small excess with a knife.

After all the necessary parameters of the room have been calculated, then you should start calculating the wallpaper. Before that, you need to know the width and length of the selected roll.

Today, there are several standards for the metric parameters of the wallpaper, as there are manufacturers both foreign and local, that is, Russian.

The roll width has many variations, but today there are three main sizes, which most manufacturers try to adhere to:

• 53 cm - the most commonly used size, therefore it is found in foreign and local brands of wallpaper. Since it is very convenient for gluing, it is preferred more than others.

• 70 cm Is the second widest width. This size is more popular with European manufacturers. As everyone knows, people are trying to buy imported wallpapers, because they, in turn, are better in some parameters, and therefore the demand for such a width is very high.
• 106 cm - as the masters say, the wider the wallpaper, the faster you can complete the process, but this is not always the case. With this width, "massive" wallpaper rolls are most often made.

As for such a parameter as length, then everything is a little simpler.

In this case, there are also three main sizes:

• The most basic length is 10.5 meters. Most wallpaper manufacturers adhere to it. It is enough for 3 full stripes on the wall.
• For wallpaper rolls 53 centimeters wide, a length of 15 meters is characteristic. As a rule, these are wallpapers made of vinyl or non-woven fabric.
• For heavy wallpaper cloths with a meter width, made of fiberglass or the same non-woven fabric, a footage of 25 meters is made.

In a wallpaper roll, there is such a concept as the coverage area, which varies from its length.

When a standard length of 1050 cm is made, and a width of 53 cm, then using the formula (S = a * b), it turns out 53000 sq. cm (5.3 sq. m). With a similar width, and a length of 1500 cm, the area will be almost 80,000 square meters. cm (8 sq. m). If we take a length of 2500 cm and a width of 106 cm, then it turns out - 25 square meters. m. - 25,000 sq. cm.

It may seem that gluing wallpaper is reduced only to calculating the footage, the number of stripes, and then rolls. Basically, this is true, but only applies to wallpapers that do not have a pattern or complex ornament. In this case, you will need to adjust the wallpaper to make it look like a monolithic piece.

Before choosing a wallpaper with a pattern, you need to determine what rapport is. Rapport is the repetition of a pattern or pattern on a wallpaper roll. In turn, it is divided into 2 types. It happens lateral (the pattern goes along the width of the sheet) and high-rise (the ornament is repeated in height). This location directly depends on the parameters of the canvas and the size and type of the ornament itself.

When gluing such wallpaper, there is one most important need - to align the wallpaper strips according to the pattern, which affects the final result. The fact is that for such wallpapers there is a slightly different calculation of the rolls.

To do everything right, you need the conventions located on each such wallpaper:

• If the designation is drawn on the label - an arrow together with 0, then this indicates that this roll of wallpaper can be glued and docked with the stripes without fear of violating the integrity of the ornament, there is not much difference.

• When arrows are shown pointing at each other, the wallpaper stripes must be clearly docked along the edges. But, if the opposite arrows are displaced (one above the other), then you need to glue with an offset up or down (in this case, a special calculation of the canvas will be made over the entire surface of the wall). As a rule, numbers are indicated on the packaging of such rolled sheets.For example - 55 \ 23, the first number indicates (in centimeters) the size of the ornament or pattern, and the second - how much (also in centimeters) one strip should be displaced relative to the other.
• In the case when the arrows point to each other from bottom to top, this means that during the arrangement of the wallpaper sheets, there should be a counter-docking.

They can be used for space under a window, between a radiator and a window sill, or for a wall gap above a door.

From the above, it is clear that the calculation of material with rapport will be different. First, you need to find out the perimeter of the wall, then divide it by the width of the wallpaper and get the number of strips you need. Then, you need to calculate how many offsets will need to be done on one strip, the larger the pattern, the more wallpaper you will need. Knowing this information, we find the number of rolls.

Calculating the number of rolls is very time consuming, especially when you do it for the first time. For this case, the masters are advised to use a special table that will help to correctly calculate the wallpaper consumption in the room.

Calculation tables can be found both in the store and on the Internet, for this you just need to write down the necessary parameters and get a ready-made result in the form of the number of wallpaper rolls. They can be guided by both the perimeter and the area. It is very easy to calculate along the perimeter, as described earlier. As for the area, here, first, you need to know the area of ​​the room itself.

For example, let's take the following parameters: length - 4 m, width 3 m. Accordingly, the area is 12 square meters. Then, you need to supplement the room with volume, namely, find out the height of the ceiling, since the result directly depends on this. Let's say the height is 2.5 meters. Further, it is necessary to determine the width of the wallpaper roll and its length - these are also fundamental figures when calculating.

Next, you just need to substitute the variables in the table data: it turns out that with an area of ​​12 sq. m, a ceiling height of 2.5 meters, and if the roll has parameters of 0.53 mx10 m, then 8 rolls will be needed.

If the room is 15 sq. m, and the height is 3 meters, then you will need about 11 rolls.

If the roll has other parameters, then, accordingly, you need to look for another table. But even so, you can understand that the wider and longer the wallpaper roll, the less they will be needed.

But it is best to use the usual formula, which calculates from the perimeter of the room.

Calculating wallpaper for a room is not an easy task, because you need to take into account many factors and nuances that can play one of the leading roles.

First of all, it is necessary to take into account a spare roll of wallpaper, as there are situations when several strips were accidentally spoiled during pasting, for example, they were badly crumpled, stained with glue on the front side, and this could not be fixed, they pasted crookedly, and everything is removed from the wall in pieces etc.

Many people wonder whether it is worth gluing wallpaper behind furniture. Masters advise two options. If this is a massive monolithic fittings that are attached to the wall and will not move or move, then in order to save money and time for repairs, you can not count on this space. But you should also understand the fact that the wallpaper sheet should go slightly behind the furniture so that there is a visual feeling that they are also glued there.

In the event that you are not sure that the furniture will stand for a long time in the same place, then, of course, you need to paste over all the walls entirely.

Do not forget about such material as glue.It is better for them to stock up with a small margin, it is much better if there is a little left for further use than there is not enough in the middle of the process.

For information on how to calculate the number of wallpapers per room, see the next video.