How Void Formers Help Protect Building Foundation 
                     How Void 
Formers Help 
Protect 
Building 
Foundation 
The foundation is the basis of stability in any building. If the 
foundation is compromised by soil movement, dampness or tree 
roots the entire structure might be affected. So it is very crucial to 
protect the base. Such cases can be quite handy for 
Void Formers Sydney. They are put in regions where the soil can 
expand or contract and impose strain on the foundation. They also 
allow a gap between the foundation and soil to minimise the effect 
of soil movement.  
  
What is a void former?  
Void formers are building elements which are used to form an empty 
area beneath or around concrete foundations. They are designed to 
prevent direct loading of the foundation by the earth. This is 
especially effective in locations with reactive soil, where the soil 
constantly varies with the degree of moisture.
1. Foundation Protection From Soil Movement 
Some soils swell when wet and shrink when dry. This constantly 
varies the pressure imposed on the foundation. If the foundation is 
directly in contact with such soil:• Uneven loading on the 
foundation• Under stress concrete can be shattered• Cracking of 
walls may occur• The building can be weakened. Void space formers 
keep the foundation somewhat isolated to this soil movement . 
2. Establishing a Controlled Void 
Void formers are mostly used for creating a well-defined space under the foundation. It serves as a buffer and insulates from the 
effect of soil movement. This relieves the foundation of the load. 
3. Application in Swelling Soil 
In reactive soils the soil is constantly swelling and shrinking with variations in moisture. In these areas void formers:• Clean the dirt 
off the concrete• Minimise effects of soil movement• Enhance the safety of foundation design They are correctly selected based on 
the type of soil at the site and the structure design. 
4. Control of Tree Root Damage 
The roots of trees draw water from the soil . This 
might cause shrinking of the soil .Near trees, the 
danger of harm is greater. The effect can be reduced 
with the use of void formers Sydney. 
5. Foundation movement control 
Trouble comes when one portion of the foundation 
shifts more than another. Can result in:• Cracks that 
pop out of the walls• Doors and windows that don't 
work correctly• Uneven ground Void formers help to 
control movement in the screed. 
6. Ease of Construction 
They are laid a certain way and the foundation is built 
atop them. This • Helps you to retain the correct 
design• Maintains order of construction process• 
Helps to accomplish the work quickly 
7. Lightweight Easy to Use Options 
Many void formers are now produced from light weight and 
easy to handle materials. This—• is easy to carry;• Less 
installation time• Works breakdown is elaborated However, 
their choice should always be informed by an engineer’s 
advice. 
8. Safety in the long run 
The foundation is the most important aspect of a 
construction. If an issue arises here, repairs might be 
complicated and expensive. Safety in the earliest stage can 
minimise future concerns in the case of void formers. 
9. Savings on Cost and Repairs 
If the foundation is destroyed, foundation restoration can be 
exceedingly expensive. The proper use of void formers—• 
May help to prevent future damage• Can reduce repair 
requirements• Could reduce costs in the long term Choice of 
Void Formers• Soil classification• Conditions of site• 
Architectural design• Type of basis• Engineering advice• 
local laws.” 
Why Professional Installation is Important? 
Void formers really do work when fitted properly. 
Wrong installation can – 
• Reduced safety 
•Undermine the ground 
So the work has constantly to be done in the eyes of professionals. 
Bottom line 
At Transvent we develop simple spiral ductwork to sophisticated pipe spools or custom void formers for a major bridge 
project, our team is devoted to providing solutions that go above and beyond expectations – on time and on budget. 
Thank You
38 Peachtree Rd, Penrith,
2750, NSW
Call us Now: 02 4731 6100
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