Voids can exist beneath your property, garage, lawn, driveway, or path, severely threatening its stability. These voids can occur for various reasons, including soil erosion, settling, and compaction. They can lead to cracking, sinking, and open holes if not fixed. They can also cause other structural damage that may not be easy to see.
Void Filling
What is a Void?
Common Repairs
How does Grace Foundation Solution carry out void fill work?
Void fill involves injecting a specially formulated polyurethane expanding foam into the voids. These products are suitable for many solutions. They can help with foundation support, filling unwanted underground services, and filling large voids.
We select materials based on the void size, location, and site-specific requirements. Our methods are usually more cost-effective than traditional alternatives and minimise disruptions, allowing businesses to operate seamlessly.
Why Choose us?
Smart Alternative to Costly Excavation
We use advanced resin injection technology to fill gaps under homes, driveways, commercial slabs, and infrastructure. This method avoids the mess and cost of digging.
Locally Focused, Auckland Expertise
Unlike nationwide firms, we specialise in Auckland’s soils, drainage issues, and unique ground conditions. That means tailored solutions, not “one-size-fits-all.”
Cost-Effective and Transparent
We provide transparent, upfront pricing without hidden extras. Because we’re leaner than the big corporates, our clients often save 15–25% on equivalent repairs.
Minimal Disruption, Maximum Strength
Most projects are finished in one day. They do not need to move out, close business, or remove landscaping.
Trusted and Guaranteed
Our solutions are backed by a workmanship warranty and trusted by homeowners, property managers, and commercial clients across Auckland.
Common Questions about Void Fill Repair in NZ?
What is void fill repair, and when is it needed?
Void fill repair means filling empty spaces under foundations, driveways, slabs, or floors. Erosion, poor compaction, leaks, or ground movement can cause these spaces. Needed when you notice sinking, cracking, or uneven surfaces.
What materials are used for void fill in New Zealand?
Depending on site conditions, expand resin polyurethane foams, cementitious grout, engineered resins, or lightweight concrete. Resin polyurethane foam is often favoured for its quick set, minimal disruption, and water resistance.
How much does void fill repair cost in NZ?
Pricing depends on the area’s size, the void’s depth, and the material you choose. For residential jobs, the typical range is $2,000 to $10,000. However, commercial or large projects can cost more. A site inspection is needed for accurate pricing.
How long does void filling take?
Small jobs may take a few hours. Medium projects usually take 1 to 2 days. Large commercial projects may take longer. Foam injection cures in minutes. This allows for a quick return to use.
What are the signs that my property needs void fill repair?
Cracked walls, uneven floors, sunken driveways, gaps under slabs, water pooling, and doors or windows that do not close properly.
Is void fill repair a permanent solution?
High-quality polyurethane foam can last for many years. It resists moisture and decay. How long it lasts depends on the ground, drainage, and stability of the structure.
Does void fill repair require excavation?
No, modern techniques like foam or resin injection are usually noninvasive. They use small drill holes instead of extensive digging.
Can void fill repair fix earthquake or liquefaction damage in NZ?
Yes, resin polyurethane injection is often used after earthquakes in Christchurch and Wellington. It helps stabilise foundations and lift slabs. However, structural engineers may be needed for serious damage.
Will insurance cover void fill repairs?
It depends on the cause. Sudden events, like burst pipes or earthquakes, are often covered. However, gradual subsidence or poor compaction usually is not. Always check your policy wording.
Schedule a free evaluation with Grace Foundation Solutions
Void fill repair means filling empty spaces under foundations, driveways, slabs, or floors. Erosion, poor compaction, leaks, or ground movement can cause these spaces. Needed when you notice sinking, cracking, or uneven surfaces.
Are you ready to learn more about what’s happening with your property’s foundation? Schedule a free consultation with Grace Foundation and ensure your foundation is in the best possible condition. Our experienced repair team will diagnose any issues and apply the appropriate solution to strengthen your residential or commercial foundation.
If a foundation resin injection doesn’t sound like the right option for your foundation, check our other foundation repair solutions and contact the team today.