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Facade insulation
Durable facades

Guide to
Facade Insulation

Facade insulation

Facade insulation is an effective way to make a home warmer, reduce heat loss, and extend the service life of the walls.
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Advantages

Main Advantages of Facade Insulation

Reduced heat loss

Keeps heat inside the house in winter and reduces wall overheating in summer.

Savings on heating

Reduces gas and electricity costs by maintaining a more stable indoor temperature.

Facade protection

Reduces the impact of moisture, temperature fluctuations, and external damage.

Sound insulation

Reduces noise from the street and makes the home more comfortable inside.

Wall durability

Extends the service life of the facade and reduces the risk of substrate deterioration.

Protection against condensation

Reduces the likelihood of dampness, mold, and mildew.

Comfortable indoor climate

Helps maintain a more stable indoor temperature inside the premises.

Improved appearance

Makes the facade neater, more modern, and visually complete.
Installation instructions

Types of insulation materials

We explain which insulation material is best suited for the facade.

Mineral wool

Mineral wool is a fibrous material known for its high sound insulation and vapor permeability.
Advantages:
Good sound insulation.
Non-combustible and resistant to high temperatures.
Allows vapor to pass through, helping prevent condensation buildup.
Mineral wool installation features:
Before applying the adhesive, the surface of the mineral wool must be primed with a liquid adhesive solution to ensure better adhesion.
Special dowels with a mechanical pin are used for fastening.

Expanded polystyrene
(bead foam and extruded polystyrene)

Expanded polystyrene is a lightweight and affordable material with good thermal insulation properties.
Feel the difference

Comparison of Types of Expanded Polystyrene

Density
Moisture resistance
Strength
Price
Bead expanded polystyrene
Lower
Medium
Lower
Lower
Extruded expanded polystyrene
Higher
High
Higher
Higher
Feel the difference

Comparison of Types of Expanded Polystyrene

Density
Moisture resistance
Strength
Price
Bead expanded polystyrene
Lower
Medium
Lower
Lower
Extruded expanded polystyrene
Higher
High
Higher
Higher

How to use flexible stone on insulation

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Getting started

Surface preparation:

Before installing the insulation, the wall surface must be carefully prepared:

Surface cleaning:

  1. Remove any loose or crumbling areas.
  2. Wash the walls if there is dust.
  3. Prime the walls if they are soft or porous.

Wall leveling:

If the wall has significant irregularities, a leveling layer of plaster can be applied (optional).
What is needed for the job

Required tools:

Basic set of tools for reliable installation of the insulation system
Mixer
Wide spatulas
(45-60см)
Trowel
Level and plumb line
Cords and fishing line
Rotary hammer
Metal shears
Scalpel or utility knife
Protective film and reinforced tape
Installation

Insulation installation

There are two classic methods for bonding insulation:
Important!
Expanded polystyrene is installed in a staggered pattern.
After the insulation is bonded, the joints are filled with installation foam.
For mineral wool, it is important to pre-treat the adhesive application areas with a liquid adhesive solution.

Surface cleaning:

  • Used for uneven walls
  • The adhesive is applied in spots — 6 spots per board
  • Minimum adhesive coverage — at least 60% of the board area

“Comb method” (full-surface layer)

  • Used on perfectly even walls.
  • The adhesive is applied over the entire surface of the expanded polystyrene with a notched trowel.
  • The insulation boards are pressed against the wall and leveled.
Fixing the insulation

Fixing with dowels

After the adhesive has dried, the insulation is additionally secured with dowels.
Insulation thickness
10 см
15 см
Dowel length
160–180 мм
200–220 мм
Dowel placement:
At the corners of the board. 1–2 dowels in the center.
Finishing

Reinforcement and finishing:

After the insulation is fixed, the reinforcement process begins:
1
Applying adhesive and mesh:
  1. First, a thin layer of adhesive is applied.
  2. Then the reinforcing mesh is embedded into it.
The mesh must not be applied directly onto dry expanded polystyrene — it must be embedded into wet adhesive.
2
Leveling:
Some installers additionally smooth the wall with a trowel using guide beacons.
Two methods are possible:
  • “under the tie” — a thin layer of adhesive;
  • “under the screed” — full wall leveling.
3
Primer
It must always be used before the final finish.
4
Final finish:
Decorative plaster can be applied.
Flexible stone requires tile adhesive.
Mistakes

Common mistakes

Even small mistakes in facade insulation can lead to serious consequences.
Incorrect adhesive application
Can lead to the insulation detaching.
Applying mesh adhesive over dry expanded polystyrene
Reduces adhesion and causes cracks.
Missing dowels
The insulation may come off the wall.
Expanded polystyrene

Grades of Expanded Polystyrene for Insulation

Not every type of expanded polystyrene is suitable for facade work: the right grade ensures strength, stability, and long-lasting insulation.
The most commonly used insulation material is expanded polystyrene.
EPS 80
(density 25 kg/m³).
Other grades:
EPS 15
too soft, not suitable for facades.
EPS 30
stronger, but more expensive.
Summary
Conclusion
High-quality facade insulation is the key to comfort, durability, and the energy efficiency of a home. Following the proper installation technology, choosing quality materials, and taking a professional approach will ensure reliable thermal insulation for many years.
Flexible stone
an excellent solution for the decorative finishing of an insulated facade
Expanded polystyrene
the best option for budget-friendly insulation.
Mineral wool
preferable when vapor permeability and sound insulation are required.