Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video

Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video Wooden houses built using frame technology are considered the warmest for a reason. But such an assessment can be justified only by high-quality thermal insulation of all elements of the structure.

In this review, we will consider how to insulate the ceiling of a frame house and create for yourself, your beloved, an extremely favorable "living environment". Due to the fact that warm air tends upward according to the laws of physics, the device of a ceiling in a private house with reliable and correctly made thermal insulation is a very important issue. The technology for creating a multi-layered skeleton cake is similar in many ways, but the devil, as you know, is in the details.

Here are the details we will discuss.

Insulation of the ceiling of a frame house

The modern market offers a huge Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video a selection of safe thermal insulation of various types, structure and price niche. The most in demand are slab mineral wool, polystyrene, penoplex and similar insulators. For the choice, we will evaluate their advantages and disadvantages.


  • Mineral wool is a relatively inexpensive material, easy to install, suitable for any step of the floor beams, however, it requires a significant thickness of the insulating layer (as a rule - 150 mm) and, in the case of a poorly executed vapor barrier, absorbs moisture.

    The almost waste-free use of insulation is also a significant plus.

  • Polyfoam is an inexpensive material, practically does not absorb moisture, but requires a large amount of sealant or polyurethane foam to seal joints and cracks. In addition, the ease of installation and material consumption strongly depends on the correspondence of the distance between the ceiling beams to the dimensions of the thermal insulation.
  • Penoplex is a material with good thermal insulation characteristics, due to which the thickness of the insulation layer can be reduced (according to the manufacturer's statement up to 50 mm). The heat insulator is practically non-hygroscopic, that is, it does not absorb atmospheric moisture.

    Its disadvantages are similar to those of polystyrene, but the cost is higher.

According to the method of work, the warm ceiling in a frame house made of the listed materials does not differ, therefore, we will consider the installation process using the example of Isover mineral wool.

Installation of insulation

It is correct to carry out the thermal insulation of the ceiling from the upper part of the ceiling in the attic or attic.

Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video
Installation of vapor barrier film

The production process consists of three stages:

  • Vapor barrier insulation against moisture from the equipped room

For waterproofing insulation from vapors moving in the room, a vapor barrier is laid on the rough boards of the ceiling between the beams a film with zero permeability, which does not allow steam or water to pass through. It can be IzospanV or a similar vapor barrier from other manufacturers.

The film is laid over the edges of the beams and fixed to the surface with a stapler. All joints of the film material are overlapped by 10 cm and glued with a special self-adhesive tape or reinforced tape.

  • Note: Typically, the side "facing" outward from the insulation is indicated on the package. In the event that a film is used that remains from the vapor barrier of large areas (roofs or walls), please note that IzospanV should lie with the smooth side to the insulation.

  • Installation of insulation

Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video After laying the vapor barrier you can start laying the insulation.

The standard thickness of mineral wool slabs is usually 50 mm, therefore, to create the required insulation of 150 mm, three layers must be installed.

The first and the second fit between the beams in a checkerboard pattern, as tightly as possible, with an overlap of the material at the joints.

This is done to eliminate the possibility of the formation of cold bridges and to obtain a homogeneous thermal insulation cake. We cover the floor with the last layer of insulation, also covering the ceiling beams.

  • Waterproofing the ceiling pie from above

After installing the thermal insulation, it is necessary to protect the material from getting wet from the outside.

It should be noted that when covering the thermal insulation pie of the ceiling in a frame house with a waterproofing film, a material with different properties is used to cover the cold and warm attic or attic room.

Do-it-yourself ceiling insulation in a frame house: Step-by-step instructions + Video
Pie of the frame ceiling

Izospan V serves as a waterproofing agent for insulation in a cold attic or a film similar in properties.

For a warm attic or attic, Izospan A is used as an insulator - a waterproofing, vapor-permeable material that does not allow moisture to pass to the insulation, but does not prevent the removal of vapors from it.

The waterproofing film is rolled over the insulation with an overlap of 10 cm and thorough sealing of the joints. As a result of the correct creation of the ceiling cake, the insulation is reliably protected from moisture penetration both from the lower floor and from the top.

In the future, you can put a floor on top of the insulation or mount transitions from boards. And in the living space to enjoy the warmth and comfort.

Polyurethane foam insulation is gaining popularity lately. True, it will be difficult to make an insulated ceiling in a frame house with your own hands in this case, due to the use of special equipment for such work.

( 4 marks, average 3 of 5 )