Sinking is mainly caused by the weight of the slab, ground movement and changes over time. Two main factors affect slab stability:

1. Soil contraction
The composition of the soil (mainly clay) can lead to contraction under a given weight. A slab placed on hard ground will remain more stable than one placed on soft ground. Clayey soil can settle as it dries, causing the concrete to sink and crack.

2. Soil leaching
Precipitation and broken pipes can lead to soil leaching, creating empty spaces under the slab. This can cause gradual sinking and fissures. Animal burrows and excavation work near slabs can also cause voids to form.

How to prevent slab sinking

During dry periods, water your yard to make up for the loss of soil moisture. Sufficiently water trees to keep their roots from causing soil compaction under your slabs.

Solution for sidewalks
Injecting high-performance polymer at specific locations under the sidewalk will restore the solidity of its base, thus prolonging its useful life and its safe use.

Repair process

GeoFix uses an advanced technique, which involves injecting a high-resistance polymer under the slab to fill the voids. The result is a straight, level slab that is firmly affixed and supported, without the need for heavy machinery.

A special polymer developed by GeoFix

Working in partnership with Genyk, GeoFix developed a special polymer adapted to Quebec’s climate and different soil types. The result of several years of research and development in Quebec, our high-density polymer withstands the freezing and thawing cycles and retains its strength in water without disintegrating. Made partly from recycled materials, our lightweight polymer is effective enough for industrial use while being safe for the environment.

Our process in three steps:

• Drill
• Inject
• Plug

Unfortunately not. Instead, we fix the cause of the cracks. However, be sure to check back as we will be adding this service in the future.

There are several reasons why slabs become uneven and cracks appear:

• Poorly compacted soil
• Water erosion (e.g., due to rain gutters)
• Voids under the slab 
• Backfill problems
• Unstable soil under the building
• Excess weight

Yes, polyurethane foam products are ecoresponsible. Since the polymer is insoluble and hydrophobic, no chemicals are released into the surrounding water and soil. Also, its application does not create any construction debris.

Yes, our products come with a 10-year warranty.

Yes, our products are custom-designed and produced by a Quebec manufacturer.

Our products are made with an exclusive polymer designed to withstand the temperature variations in our province and to give optimal results on the different types of soil found here.

Our foam systems will retain their original condition over the years, ensuring the durability of the work. As a general rule, our polymer will last as long as your concrete slabs or floors.

Although very lightweight, our polymer can withstand very heavy loads. After being injected, our products increase the slab’s bearing capacity. Case in point: we lift grain silos. See how we solved the slab sinking problem of this silo (500 tons when filled) in this video:

https://youtu.be/8fhPxJN_8QQ?si=xD7VA8BC-GbwgNMS

No, our method requires a solid concrete surface.

• Attached garages
• Basements
• Crooked slabs
• Detached garages
• Driveways
• Exterior entryways
• Floors
• Garden sheds
• Gazebo slabs
• Heat pump slabs
• Hot tub slabs
• In ground pool decking
• Porches/Patios
• Pool walkways
• Sidewalks
• Slab-on-grade homes
• Stairs
• Other

GeoFix uses unique techniques and various tools, such as laser levels, to precisely control the lifting, levelling and stabilization of concrete slabs or floors.

Not at all! The polymer formulas we use have been designed to withstand heavy loads due to their unique molecular structure. That is not the case for products used for insulation purposes.

In most cases, there is no wait time. You will regain full use of your slab or floor immediately after the work is completed. However, keep in mind that it takes two hours for the polymer to reach its maximum strength.

Small and medium-sized residential projects can be completed in just a few hours. Larger industrial and commercial projects can take a few days.

Our solution is very cost-effective. It is often less than half the cost of traditional rebuilding, not counting indirect costs such as earthwork, permits, etc.

Our method does not require any heavy equipment and leaves virtually no trace. We work within the perimeter of your concrete slab or floor and our approach does not cause any damage.

It has no impact on the environment. Since our polymer formulas are completely hydrophobic, they do not mix with the surrounding elements in any way. Also, since the material is inert, it does not pose any risk to the environment.

Inadequate water management, poorly compacted soil (which tends to settle over time), erosion (a common factor) and animal burrows all create empty spaces under the slab. These voids cause the concrete to eventually crack and/or sink.

If you have concrete slabs in your yard (e.g., a walkway around a pool), be sure to sufficiently water your yard during dry periods. You will limit the risk of the soil compacting when it loses moisture. The same goes for trees: water them generously so they do not need to extend their roots under the slabs to “drink,” which dries out the soil there.

Also, make sure that your land is sloping so that water runs off toward the street rather than toward your house. Adding rain gutters is another way to keep water from accumulating near your foundation.

GeoFix’s services are available all across Quebec. Its experts are located in the following regions and cities:

• Abitibi-Témiscamingue (Val-d’Or, Rouyn-Noranda, Amos, etc.)
• Bas-St-Laurent (Kamouraska, Rimouski, Rivière-du-Loup, Témiscouata, etc.)
• Centre-du-Québec (Bécancour, Drummondville, Nicolet, Victoriaville, etc.)
• Côte-Nord (Baie-Comeau, Manicouagan, Sept-Îles, etc.)
• Estrie (Granby, Cowansville, Lac-Mégantic, Magog, Sherbrooke, etc.)
• Gaspésie
• Gatineau 
• Lanaudière (Joliette, Mascouche, Repentigny, etc.)
• Laurentides (Mont-Tremblant, Saint-Sauveur, Val-Morin, etc.)
• Laval
• Montréal
• North Shore of Montréal (Blainville, Sainte-Eustache, Mirabel, Saint-Jérôme, Terrebonne, etc.)
• South Shore of Montréal (Boucherville, Brossard, Longueuil, Saint-Bruno, etc.)
• Montérégie (Acton Vale, Beauharnois, Beloeil, Saint-Constant, Saint-Hyacinthe, Saint-Jean-sur-Richelieu, Salaberry-de-Valleyfield, etc.)
• Mauricie (La Tuque, Louiseville, Shawinigan, Trois-Rivières, etc.)
• Outaouais (Gatineau, Papineau, Chelsea, etc.)
• Québec City
• South Shore of Québec City (Beauce, Lévis, Montmagny, Saint-Georges, Sainte-Marie, etc.)
• Saguenay–Lac-Saint-Jean (Jonquière, Chicoutimi, Alma, etc.)

An alternative to traditional methods, concrete lifting and levelling corrects sunken slabs in a way that avoids costly, complex and property-damaging demolition and reconstruction.

The procedure we use to bring a horizontal concrete component to the desired level preserves its useful life, reduces friction-related wear, fills voids underneath and maintains a safe environment. This method only minimally affects day-to-day activities, causing little inconvenience to users.

To preserve its useful life, reduce friction-related wear and fill voids that have formed underneath.

GeoFix’s solution has many advantages:

• Provides adequate support under the slab
• Restores efficient drainage, preventing erosion
• Complies with the building codes in force
• Has only minimal impact on day-to-day activities
• State-of-the-art equipment
• Dust control
• Environmentally responsible
• Professional work covered by warranty
• Available throughout Quebec

Soil
One of the most common causes is a base with reworked soil around its periphery.

Weather
Spring floods and torrential rains can degrade the substrates under the slab. Freezing and thawing can also increase the risk of the slab sinking.

Erosion
Inadequate water management causes damage and erosion.

Presence of machinery and significant vehicular traffic

The vibrations caused by stationary machinery or moving vehicles such as trucks or forklifts can cause the substrates under the slab to move, creating voids and causing the slab to shift.

Concrete can withstand compression but not tension caused by a lack of support. GeoFix’s solution gives the slab support, preventing stress and weakening.