Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos

Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos Expanded clay has become one of the versatile materials that have now gained significant application in construction. Expanded clay is mainly used as insulation.

Expanded clay is relatively cheap, due to this, a long-term perspective of its use is predetermined.

Many people choose expanded clay for insulating buildings taking into account the advantages that distinguish it favorably from other materials: ease of use, price, unique thermal insulation and good operational properties. availability.

And if we compare expanded clay with brickwork, then the quality of thermal insulation will be much higher in the former.

Expanded clay. General information

What is expanded clay made of

Expanded clay is produced by high-temperature processing (firing) of clay shale containing no more than thirty percent of quartz.

Production of expanded clay

The formation of expanded clay granules of the required size occurs when it is rotated in special drums. After processing, air bubbles remain in expanded clay granules, which leads to a low weight of the granules.

Thus, expanded clay is environmentally friendly.

Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos It is harmless to health, because it is made without synthesized chemical additives. Has excellent technical performance.

Difference in types of expanded clay

Expanded clay is distinguished into three types of strength, granule size, density:

  • - sand (up to 10 millimeters)
  • - crushed stone (10-20 millimeters)
  • - gravel (up to 40 millimeters)

The main characteristic of expanded clay is a cellular structure and texture, which has a lot since. The quality of the expanded clay composition determines the accuracy of compliance with technological processes.


Positive characteristics of expanded clay

  • Noise isolation - absorbs extraneous sounds
  • Thermal insulation - increases the thermal characteristics of the premises
  • Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos Frost resistance - not subject to destruction when exposed to low temperatures
  • Fire resistance - does not deform, retains its properties under the influence of fire
  • Durability - does not change its properties when the nature of temperature effects (high / low temperatures) changes, the service life is longer in comparison with other heaters
  • Environmental friendliness
  • Chemical neutrality
  • Simplification and reduction of the cost of installation of building structures - the low weight of expanded clay allows making lighter frames
  • Cost. It compares favorably to the lower side than the cost of other heat-insulating materials in this category

Disadvantages of expanded clay

The weaknesses of expanded clay include its low moisture resistance. When wet (when water gets into the expanded clay granules), its characteristics are reduced. This must be taken into account when laying expanded clay and ensure its protection.

The use of expanded clay in engineering communications

Energy saving technologies rule the ball on the stage of our time.

And not only in industry, but also in everyday life. They significantly reduce material costs, while not impairing the consumer characteristics of buildings that carry different functional loads. A considerable share of the resource is spent on heating the premises, and it is precisely heat conservation that should be given more attention.

It is most efficient to create thermal insulation for communications (pipelines, etc.) during construction by filling cavities in structures with expanded clay granules.

Expanded clay sand

Dry mixtures are made from the smallest type of expanded clay - expanded clay sand. They are used for insulating various cavities - walls, ceilings, foundations. When laying parquet, compacted expanded clay sand serves as a litter. Heat losses are significantly reduced: by sixty - seventy percent when adding a layer with a thickness of 0.1 - 0.

15 meters.

Expanded clay gravel

Gravel is optimal for insulation and warming of floors and ceilings. When building the foundation, using expanded clay gravel, it is possible to reduce the depth of its occurrence to 1.5 meters. Insulation of the attic and attics is also ideal for its use.

Thermal insulation of the floor with loose expanded clay

When insulating the floors, keep in mind that they carry a continuous load. The thickness of the poured layer and the screed layer must be carefully calculated; floor loads are planned.

In the process of warming, expanded clay is distributed over the waterproofing layer. Waterproofing can be made of thick plastic wrap. To get a single canvas, the joints must be sealed with construction tape.

It is spread over the walls. The height of the canvas on the wall should be at least equal to the height of the insulating layer poured onto the canvas.

Parameters of expanded clay fraction

It is recommended to mix expanded clay using at least two types of clay. This is necessary for dense filling of cavities in order to avoid further shrinkage during operation.

Floor insulation with expanded clay takes place in several stages, the first of which is preparation for floor insulation with bulk expanded clay

What is the preparation for floor insulation with bulk expanded clay?

  1. - Ensuring the mechanical strength of the base (detecting defects, repairing them, etc.


  2. - Coating the surface with antiseptic compounds and drying them
  3. - Laying a waterproofing layer to protect expanded clay from exposure to moisture

In the preparation phase, it is also recommended to prepare a mixture of expanded clay fractions (granules of different sizes) - to compact and strengthen the overall structure of the heat-insulating layer.

The technology of laying expanded clay can differ depending on the base materials, on the technological features of the finish.

Adding expanded clay to concrete

When insulating floors in non-residential premises, you can use a mixture represented by the following proportions:

  • Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos - 1 hour of water
  • - 2 hours of sand
  • - 1 hour of cement
  • - 3 hours of expanded clay

From these ingredients, a building mixture is prepared for screed.

Expanded clay is often used in the bases for coating (dry screed) floors of residential premises.

If necessary, floors are reinforced with metal mesh.

Where to buy expanded clay, what is the price?

Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos

Is it worth insulating the floor with Expanded clay as insulation? Pros and Cons - Tips and Types + Videos


And, Finally, a few recommendations:

  • - for waterproofing, for example, bitumen-based mastics are suitable;
  • - the thickness of the insulation is calculated from the expected load on the floor;
  • - in As additional equipment to increase strength, the floor, insulated with expanded clay, is reinforced before the screed;
  • - the floor can be used only after final hardening and curing with a cement coating.