Concrete · Service

Foundation concrete for new work — not foundation repair

Footings, foundation walls and structural slabs for additions, garages and outbuildings. If the house has already settled or cracked from movement, that is a different industry and a different page.

Get matched free All concrete services

In short

What is foundation concrete?

Foundation concrete is the new pour that carries a structure: excavated footings, formed foundation walls or piers, and often a slab — for additions, garages, ADUs and outbuildings. It is planned from soils, frost depth, loads and permits. It is not the same service as foundation repair, which stabilises or remediates an existing foundation that has already failed or moved.

Triggers

Signs you need foundation concrete

You are adding a room, garage, porch with structural loads, or detached building that needs a real foundation
Plans call for continuous footings, stem walls, a basement under a small addition, or a thickened-edge slab
A builder or architect needs a concrete contractor for the foundation package only
An old shed pad is being replaced with a permitted garage foundation
You need inspected, documented concrete work for a lending or municipal requirement on new construction

Seeing something not on this list? Browse concrete problems by symptom →

The job

How foundation concrete actually works

Separate "new foundation" from "repair foundation"

Cracks, settlement, bowing walls and sinking corners on an existing house are foundation-repair problems — piers, stabilization, crack injection. New foundation concrete assumes you are building something that does not exist yet, or replacing a foundation as part of a rebuild under structural direction.

Watch for: A flatwork crew bidding "foundation concrete" to fix a settling house without geotech or structural input. Wrong trade framing.
Plans, soils and frost depth

Loads, wall heights, soil bearing and climate-driven footing depth come from design documents and local code. Surprises in poor fill or high water table change excavation and may require engineered revisions before concrete is ordered.

Watch for: Pouring to "what the neighbour has" without checking permit conditions on your lot.
Excavation, forms and steel

Footings are dug to design depth on competent material, forms set true, and reinforcement placed with proper chairs and clearances. Anchor bolts and hold-downs for the framing package are located before the pour, not drilled randomly later when possible.

Watch for: Steel lying in the mud at the bottom of the footing. Cover and placement are structural, not cosmetic.
Inspections before concrete

Most jurisdictions inspect footings and often walls before placement. Pouring without a required inspection is how people pay twice — once to pour, once to expose or replace.

Watch for: Pressure to pour Friday because the truck is cheap when the inspector has not signed. Wait.
Place, consolidate, cure

Concrete is placed, vibrated or otherwise consolidated in walls, finished as specified on slabs, and cured. Cold-weather and hot-weather practices matter more on foundation walls than on a short sidewalk because section thickness and strength timelines differ.

Watch for: Adding water on site to make the mix "easier" until strength suffers. Strength is why you poured a foundation.
Damp-proofing, drains and backfill coordination

Foundation walls that retain soil often need exterior drainage and damp-proofing or waterproofing before backfill — sometimes by other trades. Sequencing with plumbers for under-slab rough-in is part of the foundation package on many additions.

Watch for: Backfill against green walls with no drain plan. You just built a basement moisture problem.
Coordinate under-slab plumbing and electrical sleeves

Once concrete is placed, moving a mislocated sleeve is brutal. Plumbing and electrical rough-ins that pass through the foundation package need verified locations against the plans before the truck is ordered.

Watch for: Pour day surprises about a missing sewer stub or electrical conduit. Hold a coordination check the day before.

Money

What does foundation concrete cost?

New foundation concrete is bid from plans: lineal feet of footing and wall, slab area, steel, depth, access and inspection complexity. Additions on tight lots cost more per foot than open greenfield pours. Repair of existing foundations is a separate market — do not use new-pour square-foot guesses for pier work.

See the full foundation concrete cost guide — by material, size and region →

Straight answer

When foundation concrete is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

You only need a garden wall holding two feet of mulch. That is landscape retaining work, not building foundation concrete.
Your existing house is settling, cracking or has bowing foundation walls. Go to foundation repair — helical or push piers, crack repair, leveling — not a new-slab contractor.
You only need a simple floating shed pad with no permit path. That may be ordinary flatwork on the concrete installation page, not a full foundation package.
Structural design does not exist and loads are unknown. Pouring "something stout" without design is how overbuilt messes and underbuilt failures both happen.
Utilities under the footprint are unmapped. Locate and relocate first; concrete is unforgiving over a surprise main.
You need crawlspace or basement remediation (moisture, jacks, encapsulation). Different specialty than casting new walls.
The quote is only for concrete and silently excludes excavation, steel or pumps required by the site. Incomplete scopes are not bargains.

Your options

Types of foundation concrete

Foundation repair

Existing homes that have moved.

Concrete installation

Non-foundation flatwork.

Retaining wall concrete

Site walls holding soil, not building foundations.

Compare concrete options side by side →

Before you sign

What to check when hiring for foundation concrete

Are you bidding from stamped plans, and what happens if soil conditions differ?

Change-order rules should be clear before excavation.
What is included — dig, forms, steel, pump, finish, curing, debris?

Foundation bids hide exclusions more than almost any flatwork bid.
Who schedules inspections, and what is the pour window after approval?

Weather and inspector timing drive real calendars.
How are anchor bolts and hold-downs located?

Framers inherit mistakes poured into the wall.
Who handles damp-proofing, drain tile and backfill if required?

Often split trades — ownership prevents finger-pointing.
What concrete strength and testing, if any, are specified?

Matches plan requirements and lender expectations.
What is the plan for rain the night before a pour?

Water in the excavation is a quality issue, not a minor inconvenience.
How are as-built bolt locations documented for the framer?

Framing crews need accurate layout after forms come off.

All concrete hiring checklists →

Local pros

Foundation Concrete near you

Local pro matching for foundation concrete is rolling out by metro. Enter your ZIP and we'll match you with vetted pros in your area today.

Related work

Often done at the same time

Concrete Installation

Slabs and general flatwork

Retaining Wall

Site walls, not building foundations

Concrete Demo

Removing old foundations and pads

Patio Concrete

Non-structural outdoor slabs

All concrete services →

FAQ

Foundation Concrete — questions people ask

Still have a question? Talk to our team →

Is foundation concrete the same as foundation repair?

No. Foundation concrete places new structural concrete for buildings and additions. Foundation repair stabilises or fixes foundations that already exist and have problems. Using the wrong contractor type wastes time and can miss engineering the situation requires.

Do I need engineered drawings?

Many additions, garage foundations and any unusual soil or load condition require them; simple projects in some jurisdictions use prescriptive code details. Your building department's permit path is the authority — not a generic article.

How long before we can frame?

Depends on wall versus slab, mix, weather and the structural specification. Crews often give a minimum cure before heavy loads or backfill. Follow the engineer and inspector, not a fixed "two days" myth.

Can the same company pour the driveway later?

Often yes, and coordinating elevations between foundation and flatwork is valuable. Still treat them as separate scopes with separate thicknesses and jointing.

What about slab-on-grade versus crawlspace walls?

Both are foundation concrete when they carry the building. Slab-on-grade packages emphasise subgrade, vapour control and thickened edges; wall foundations emphasise footings, forms, steel and drainage. Plans decide which you are buying.

Who fixes a foundation that cracks after a pour?

New work has warranty and structural review paths through the builder and concrete contractor. Long-term settlement years later may become a foundation-repair evaluation. Document pours, inspections and photos at construction time.

What is the difference between a footing and a foundation wall?

The footing is the widened base that spreads load into the soil. The foundation wall or stem rises from that footing to carry the structure above grade or to form a basement. Slabs may work with thickened edges instead of tall walls. Plans specify which assembly you are buying — do not let a casual "foundation" quote blur them.

Can weather delay a foundation pour?

Yes. Frozen subgrade, heavy rain in the excavation, extreme heat and high winds all affect placement quality. A good crew protects the excavation and waits rather than trapping mud under a footing. Schedule buffers around weather are normal, not a sign of poor planning.

Who is responsible if the soil under the footing is soft?

That depends on contracts, soils reports and whether the condition was foreseeable. The practical rule is: stop, document, and get design direction before pouring on soft material. Pouring through a surprise is how expensive failures start. Clarify stop-work and change-order rules before excavation day.

Do I need waterproofing on a garage foundation?

Not every garage stem needs full basement waterproofing, but damp-proofing, drainage and correct grade still matter where soil is against the wall or the slab is below surrounding soil. Follow the plans and local practice rather than skipping everything because "it is only a garage".

What is a cold joint and why do inspectors care?

A cold joint forms when fresh concrete is placed against concrete that has already begun to set without a planned construction joint detail. In foundation walls it can become a weak plane and a water path. Continuous placement or proper joint detailing matters.

Should foundation concrete be tested?

Many commercial and some residential jobs take cylinders for strength testing when specified. Not every house addition requires it, but when plans or lenders call for testing, budget the time. Strength on paper beats hope.

How do I prepare for foundation pour day?

Confirm inspections are signed, utilities are marked, the site is accessible for the pump or chute, and neighbouring access agreements are in place if trucks need them. Hold a final walkthrough the day before so missing sleeves surface while they are still fixable.