Service
Parking garage expansion joint repair and deck joint sealing
A parking structure is a concrete deck that carries cars, salt and snowmelt over other cars. Its expansion joints are the only flexible element in the whole building, and when they fail the deck below is what pays.
From Buckley Joint Sealants, a commercial caulking contractor in Aurora, quoted against published pricing.
How a failed garage joint shows itself
The first sign is almost never on the joint. It is a drip line on the deck below, a rust stain running down a column, or a wet spot on a car hood in the lower level. By then the expansion joint gland has torn or the nosing has broken away and snowmelt carrying deicing salt has been running through the joint onto the reinforcing steel below. Colorado garages see this earlier than most because the deck goes through dozens of freeze and thaw cycles a winter and the salt load from I-225 and E-470 commuters is constant from November through March.
Control joints and cove joints at the deck to wall line fail more quietly. The sealant hardens, cracks, and the joint becomes a drain into the slab. Left alone that is spalled concrete and exposed rebar within a few seasons.
Systems we install and repair
Expansion joints in a garage are a system, not a bead: a gland or a precompressed foam seal, an elastomeric nosing on each side, and sometimes a cover plate for the drive lanes. We remove failed systems to sound concrete, rebuild the joint edges with the manufacturer’s nosing material, and install the new gland or precompressed seal to the movement rating the joint needs. On smaller joints and cove joints we use a traffic grade two part urethane or a silicone rated for horizontal traffic, set over backer rod like any other joint but tooled to shed water.
We work with expansion joint systems validated through the Sealant, Waterproofing and Restoration Institute program where the specification calls for it, and we document what went in so the deck coating contractor and the structural engineer see the same product names.
Keeping the garage open
Garage work is phased by level and by drive lane so the structure stays in use. Joint systems cure overnight for foot traffic and within a day or two for vehicles, so a typical mid size garage loses a lane at a time and never a whole level. We coordinate with the deck coating contractor when both scopes are in the same season, because the joint has to be finished before the coating is tied into it.
How a garage joint project runs
- 1
Survey every expansion, control and cove joint by level, note deck leaks below each and photograph nosing and gland condition.
- 2
Quote per linear foot by joint type and system, with concrete repair at joint edges itemized separately.
- 3
Phasing plan by level and lane, agreed with the property manager and any deck coating contractor on site.
- 4
Remove failed systems and sealant to sound concrete, rebuild joint edges with nosing material.
- 5
Install new gland or precompressed seal, or traffic grade sealant over backer rod on smaller joints.
- 6
Cure, reopen lanes, and close out with a joint map, product data and warranty.
Pricing for this work
| Job type | Typical range | What moves the price |
|---|---|---|
| Expansion joint system replacement (gland or precompressed seal with nosings) | $30 to $90 per LF | System type, demolition of the old system, nosing rebuild depth |
| Deck control joints, traffic grade urethane or silicone | $6 to $14 per LF | Joint width, edge spalling, salt contamination cleanup |
| Cove joints at deck to wall and column lines | $7 to $15 per LF | Access at columns, backer type, coating tie in |
| Concrete edge repair at joints | Quoted per location | Depth, rebar condition, engineer involvement |
Full table and worked examples on the cost guide.
Garage owners and HOA boards ask
How much does it cost to replace the expansion joints in a parking garage?
Full expansion joint system replacement runs $30 to $90 per linear foot depending on the system and how much nosing concrete has to be rebuilt. A three level garage with 600 feet of expansion joint commonly lands between $25,000 and $60,000, plus control and cove joint sealing if that is failing too.
Is a leaking garage joint a structural problem?
Not by itself, but it becomes one. Salt water through a joint corrodes the reinforcing steel in the deck below, and corroded steel expands and spalls the concrete. Repairing the joint now is a sealant cost. Repairing the deck later is a structural repair with an engineer involved.
Can you do the joints and the deck coating together?
We do the joints and coordinate with your deck coating contractor so the coating ties into finished joints. Doing them in the same season with one closure plan is the least disruptive path for tenants.
Do garage joints need an engineer or a permit?
Joint system replacement alone is usually maintenance. If the survey finds deteriorated deck concrete or exposed reinforcing, a structural engineer should scope the concrete repair, and that work can need a permit. We flag it at the survey rather than after demolition.
Related work: Joint sealant replacement · Tilt-up and precast panel caulking · Window and curtain wall perimeters. Where we do it: Denver, Centennial, Greenwood Village, Englewood and all service areas.
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