Foundation insulation

Groundwater insulation is one of the most important parts of any structure. Foundation waterproofing interrupts the capillary action that draws moisture into the foundation of a newly constructed house.

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The following insulations are used to remedy moisture problems:

  1. crystalline foundation insulationtechnical procedure: the cleaned concrete slab is dampened with water and a coating is applied in two layers. The curing period is approximately 28 days and the applied material seeps into the concrete, plugging the natural pores that support the capillary action that draws moisture into the concrete.
  2. foundation insulation using asphalt strips - technical procedure: a penetrating agent is applied to a clean and dry concrete slab and is allowed to dry for a day; asphalt strips are then applied on the following day with the strips overlapping by ~10 cm and a torch is used to bond the asphalt together
  3. plastic-based foundation insulation - technical procedure: cut strips of a thin plastic film are placed on a clean concrete slab, overlapping by ~5 to 10 cm and they are bonded and sealed using a hot air gun and a roller

Undercutting walls and foundations

This is the oldest and most effective method for eliminating moisture in walls caused by capillary action in existing houses or other buildings constructed of fired bricks, clay bricks, blocks or fired clay.

Reasons why you have moisture in your walls

  1.  your existing insulation has failed and no longer performs its function
  2. insulation was not used in many older buildings as it was a less common practice than it is today
  3. existing insulation was damaged during installation
  4. incorrect insulation used in the construction of a new house or other building

Advantages of remediation

  • This remediation method has the following advantages:
  • 100% and immediate elimination of moisture
  • highly durable materials
  • suitable method for all types of walls in which the gap is installed
  • low price

We don’t use cheap fusing strips

Many customers use the cheapest asphalt strips which are not frost resistant and should only be used in applications down to 0 degrees Celsius. At sub-zero temperatures, the walls freeze, the asphalt strips contract and cracks form that allow moisture to pass from the foundation and into the walls.

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. 

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