Insulation of floors with penoplex and OSB sheets

In order to increase heat saving in the house, it is necessary to insulate it. In addition to insulating walls and windows, it is important to pay attention to the floor. Now we will look at one of the simple but effective ways to insulate the floor, using penoplex, as well as OSB sheets.
Insulation of floors with penoplex and OSB sheets

Preparation


First you need to prepare the floor surface. This insulation option can be used on any floor surface, regardless of the material (wood, concrete). In the example in the illustration you can see an old surface made of wooden planks. It is not necessary to dismantle the old surface if it is not rotten and is in good condition. During preparatory work, it is necessary to dismantle the old baseboard.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

If the surface is partially damaged, then only these areas can be dismantled and replaced.
Next, you need to determine from which point in the room you will begin installation. Try to use a building level or water level to identify the highest point from the edge and start from there.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

Ideally, the surface should be flat, or relatively flat, without too much variation. Therefore, if in your case the concrete screed is not level, it is better to first level the surface.In our example, the wooden floors were approximately level, so we could start working right away.

Laying penoplex with OSB sheets


The standard size of OSB sheets is 2500x1250 mm. Therefore, it is necessary to step back from the edge of the wall by approximately 1240 mm, and screw a wooden block 20 - 25 mm thick to the floor, on which the OSB will subsequently be laid. Also, a wooden block is attached near the wall. Then, using polyurethane foam, the corners are coated, as well as the surface of the floor inside the bars where the penoplex will be laid.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

It is best to use polyurethane foam with a special gun, as this is a more economical and convenient option. In this case, the foam does not dry out and can be used for several days, while conventional cylinders must be used immediately after opening. After this, penoplex is laid on the foam.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

You will also need a construction knife to trim the foam. Next, you need to coat the foam again with polyurethane foam and put an OSB sheet on top. Finally, the OSB sheets are screwed with self-tapping screws to the wooden planks along the edges.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

For the floor, it is necessary to use thin OSB, otherwise it will sag under heavy weight. The minimum thickness of OSB should be 16 mm.

Another option for uneven floors


Another installation option is applicable if the floors are not level, which is why it is not possible to fill wooden blocks, since they will also not be level. In such a situation, you can screw self-tapping screws into the wooden floor, with an indentation of 10 - 15 cm in rows. However, the screw heads must be level.To do this, place a building level on 1 row of screws and make sure that it rests on all the screws without gaps.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

After all the screws are tightened, the surface is coated with polyurethane foam, on which foam sheets are laid.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

After this, foam is also applied on top of the penoplex. Next, an OSB sheet is laid, which is screwed to the floor with long self-tapping screws. To trim OSB you will need a jigsaw.
Insulation of floors with penoplex and OSB sheets

Insulation of floors with penoplex and OSB sheets

For better waterproofing, fill all seams between foam sheets and OSB sheets with polyurethane foam. The same must be done along the edges, between the wall and the OSB.
This option is an excellent way to insulate floors, as well as level them. After this, you can lay laminate or linoleum on OSB.
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Comments (3)
  1. Leo
    #1 Leo Guests 15 July 2019 22:45
    2
    Yes, not OSB, but OSB
  2. Guest Anatoly
    #2 Guest Anatoly Guests 18 July 2019 14:11
    2
    In general, this is OSB, but OSB is something else.
  3. Igor
    #3 Igor Guests 18 November 2021 12:36
    2
    Won't the boards underneath rot?