Undercutting walls

Whole-house undercutting is the oldest method used to insulate foundations in existing houses and other structures. This is retrofit foundation insulation process as the building was constructed in the past.

odstraňovanie vlhkosti muriva

100% method for removing moisture in a home

Capillary action is interrupted along the entire length and width of the wall with a highly durable polyethylene plastic insulation. This method for eliminating moisture in walls is suitable for all types of walls of variable thickness, including solid and hollow fired bricks, unfired bricks, all types of hollow and solid blocks, stone walls and fired clay walls. We use this method to insulate uninhabited structures or fully inhabited houses with a minimum of restrictions.

Advantages of whole-house undercutting:

  • immediate interruption of capillary action,
  • 100% elimination of moisture,
  • highly durable materials,
  • suitable for all types of walls and structures,
  • low cost to remedy moisture problems.

Technical procedure for whole-house undercutting

The working height of the gap is first determined for the purposes of adding the retrofit insulation. An electric chainsaw is then used to cut the full width of the wall ~1 m in length. A 2 mm thick layer of polyethylene plastic is added as insulation, which immediately interrupts the capillary action. Plastic structural wedges are then inserted into the gap between the insulation and the wall for structural purposes. 

This method is repeated around the peripheral walls and then the partitions that connect to them. The entire structure is separated by insulation that overlaps by ~5 to 10 cm, and is secured structurally by the wedges. 

Cement-lime mixtures are inserted into the gap between the static wedges using a special injection machine specifically designed to fill in cracks in masonry structures. 

Whole-house undercutting is a very specialised process that interferes with the structure of the house or building to remove moisture. If water removal work is conducted unprofessionally, some parts of a house may settle or cracks may appear in the walls over time. It is critical to choose a company with the expertise and qualifications necessary to professionally eliminate moisture.

Technical procedure for undercutting walls

1. undercutting foundations

Our trained professionals define the appropriate gap to install when undercutting your walls. If the floor is selected in the insulated building, the undercut is made between the foundation and the first row of the brick or block wall. If the gap between the foundation and the first row is too small, the wall is undercut between the first and second row of brick or block. 

2. we insert insulation into clay

We then proceed to under cut the foundation or wall along its entire length and width, approximately 0.5 to 1.5 m, depending on the strength of the insulated structure. 
Polyethylene insulation is then inserted into the gap. The insulated wall is then structurally secured with plastic wedges that
are driven with a hammer into the gap. 


3. covering the insulation

The wedges are specially manufactured for retrofit wall insulation and may be cut to fit any height structure. 
This method is used to undercut the entire perimeter of the wall, and is followed by the undercutting of the internal load-bearing and partition walls, which are connected to the insulation and the peripheral walls. Insulation coverage in the wall is anywhere from 5 to 10 cm. 
The excess material is allowed to protrude from both sides of the wall to permit their full integration.

4. pressurised filling

Cement-lime mixtures are inserted into the gap between the static wedges using a special injection machine specifically designed to fill in cracks in masonry structures. 

podrezanie základov muriva
vkladanie izolácie a klinov
prekrytie izolácie
aplikácia pur peny