The most significant advantage compaction grouting techniques have over pier methods for foundation repair is that there is no long term visible evidence of the repair, which means there is no lingering reminder of previous foundation problems. This both enhances your enjoyment of your home now, and preserves its resale value later.
Compaction Grouting Is Less Invasive Than Piers
The lower cost, lack of demolition and lack of long term visual repair evidence are all reasons why compaction grouting is preferred to piers for residential foundation repairs.
But the most important reason is that - while piers address the symptoms of the problem - compaction grouting addresses the problem itself by stabilizing the soil your foundation rests on.
|Project Timeline||Piering: averages 2 to 3 days
Post-project repairs: weeks to months
Slab replacement, landscaping replacement, electrical, plumbing, flooring, drywall and painting are common post-project repairs that require extensive additional time.
|1 to 2 days|
|Excavation||Extensive excavation of the foundation is generally required.||No excavation necessary|
|Demolition||Removal of floor slabs, patios, sidewalks and porches is often necessary.
The homeowner is responsible for the additional cost of replacement.
|No demolition necessary|
|Structural Support||Foundation loads are concentrated on widely spaced piers and lifting foundations off of supporting soils creates voids below the footings.||Structure remains in full contact with underlying soil, properly distributing foundation loads.|
|Foundation Cracks||Piers are often only installed on one side of a foundation crack, with no additional support to prevent further foundation movement and additional damage.||Compaction grouting evenly supports the foundation on both sides of the crack|
|Landscaping||Extensive removal of landscaping near the home is often necessary. It is expensive to replace landscaping plants, and impossible to replace mature growth.||No removal necessary|
|Heavy Equipment||Heavy construction equipment must be brought onto the property, which often damages the lawn.||No equipment necessary on the property. Most often, the truck pumps grout from the street.|
|Immediate Post Project Appearance||Unsightly lawn damage, landscape damage and demolition (such as missing patios or porches) remain.||Property retains original appearance with no further action necessary.|
|Post Project Repairs||Homeowners may need to hire additional contractors to replace garage floors, patios, sidewalks, landscaping, porches, flooring, electrical or plumbing.||No repairs necessary|
|Long Term Appearance||If piers are bolted to the interior foundation, they are obvious physical reminders of major repair work. Additional visible evidence includes demolition of floor slabs, patios, sidewalks and landscaping.||There is no visible evidence that foundation repairs were performed.|
|Risk of Recurrence||Piers are a band-aid on a symptom.
The original unstable soil problem remains, as well as any issues with improperly compacted backfill from home construction or other prior excavations. Piers do not address either of these issues, and both can cause existing and newly replaced concrete slabs to settle.
|Compaction grouting solves the problem at its source.
Foundation issues cannot return because the soil it rests on has been stabilized.
Compaction Grouting Costs Less Than Piers
The lower baseline project cost of the modern concrete grouting foundation repair method is just one reason why it has a lower overall cost than piers.
Outdated pier methods are extremely invasive. It requires extensive excavation and demolition to access the foundation, and the homeowner is responsible for all the additional costs associated with repairing the areas impacted after piering is complete.
|Piering Total Cost||Compaction Grouting Total Cost|
|Foundation Repair Service Cost||Varies per project||Averages 50% less per project|
|Slab Replacement (Garage, patio, sidewalks)||$3,000 - $10,000+||$0 - no removal required|
|Brickwork replacement (patios, sidewalks, landscaping)||$3,000 - $10,000+||$0 - no removal required|
|Landscaping replacement||Varies, average $1,500 - $5,000||$0 - no removal required|
|Interior slab or flooring replacement||$5,000 - $20,000+||$0 - no removal required|
|Interior decor (cosmetic repairs)||Varies depending on piers placement, some may significantly impact interior spaces, potentially requiring corrections like partition walls to disguise the attachment points||$0 - no cosmetic impact for foundation stabilization
Note: When raising a sunken foundation, both methods may crack remodeled finishes