Joint spalls, curled panels and settled aisles are the three ways an industrial slab tells you it has reached the end of its life, and each one is hard on a forklift. Spalled joints beat up wheels and loads. Curled panels rock under traffic and break the edges. Settled aisles throw off pallet rack plumb and tilt tall loads. Patching treats the symptom; replacement fixes the section that is failing, and the question is how much to replace, in what order, and how to do it without stopping shipping.
We demolish and replace industrial slabs in warehouses, plants and yards across Colorado. The work starts with finding out why the slab failed. Poor subgrade, expansive clay, a missing vapor barrier, undersized joints or loads that exceed the design each produce different damage, and replacing a slab without correcting the cause only resets the clock. We open test sections, probe the subgrade and review the original drawings before we draw the replacement boundary.
The replacement slab is built to what the operation does now, not what it did when the building was new. A distribution tenant that added narrow-aisle racking needs a flatter, stiffer floor than the one it inherited. A plant that added a press needs a foundation, not a thicker slab. We tie the replacement design to industrial concrete floors practice and call out the points where the existing structure limits what is possible.
What lies under the old slab
The first surprise in slab replacement is usually below the concrete. In old industrial corridors, soil under a slab can carry a legacy of past use. Neighborhood activism in Globeville and Elyria-Swansea won a 1994 settlement with ASARCO that funded soil cleanup, a sign of legacy smelter contamination to check in due diligence near those industrial areas. In Lakewood, the Denver Federal Center covers 623 acres, and cleanup of the former ordnance plant site is overseen by the Colorado Department of Public Health and Environment. A building in or near such areas should be screened before excavation.
We include sampling in the scope where history suggests it, and we plan for handling and disposal of soil that tests above limits. Utility conflicts are the other hidden item. Ground-penetrating radar locates conduit, drains and post-tensioned tendons before sawing begins, because a cut through a tendon or a live feeder is a safety event and a repair. We keep the scan results in the project file and mark the slab before work starts.
From saw cut to cured floor
Whole-structure removal is a different scope, covered under industrial demolition services. Slab demolition begins with saw-cutting the boundary to full depth, so the new slab bears against clean edges and the surrounding floor is not damaged. The slab is broken and removed in sections, with dust control by wet cutting or vacuum, and hauled to a recycler where possible. The subgrade is then inspected, repaired and recompacted, with any soft or moist zones undercut and replaced with engineered fill. Vapor barrier, base course and reinforcement follow.
Reinforcement and joints are where the new slab earns its life. We use the thickness, steel, fiber and dowel layout from the engineer, with load-transfer devices at construction joints in forklift paths and armored joints where traffic is heaviest. The new panels tie to the old slab with dowels drilled and epoxied into the saw-cut face. Placement is by pump or direct chute, finished with laser screeds where flatness is specified, cured by wet cure or membrane, and joints are sawn within the window the mix allows. Related structural conditions are covered in industrial renovations and modernization.
Dust, noise and traffic around the cut
Concrete cutting and breaking release respirable crystalline silica, so wet methods, vacuum shrouds and monitoring are part of every job. Breakers and saws are loud and transmit vibration through the slab, and we coordinate with your operations lead so vibration-sensitive equipment, such as measurement stations and automated storage systems, is not affected. We set up barricades around each cut, mark pedestrian routes and keep forklift lanes separate from the work.
Heavy equipment inside an operating building is a hazard we plan for in detail. Skid steers and trucks use designated routes, and spotters work wherever they cross a lane. Fall hazards at open dock pits and trenches get covers and guardrails. We check the lockout status of equipment near the work area, and temporary ventilation controls exhaust from any gas-powered equipment used indoors.
Sequencing the replacement
We replace slab in sections sized to the shipping operation. A typical plan closes a few aisles at a time, with the cut, removal, subgrade repair, placement and initial cure in a single window. Racking is moved or the load is cleared from the zone beforehand, and we coordinate with your operations team so product is staged elsewhere. Full-strength cure takes longer than the initial return to foot traffic, so we hold forklift loads until the slab reaches the specified strength.
Cold weather and altitude affect placement. Concrete cures slowly in cold buildings, and Denver averages about 49 to 54 inches of snow per year, so winter work in unheated areas may need blankets, heaters or accelerated mixes. We plan placements with weather forecasts, and for large replacements we may schedule work in warm months. When a shutdown is available, a larger continuous pour is faster and produces fewer joints, as described in our phased construction for occupied sites.
Decide what to replace and what to repair
Not every failed joint needs a new slab. We grade defects into three categories: surface repairs (joint filler, spall repair, grinding), partial-depth repairs, and full-depth replacement. We survey the floor with a profilometer or flatness measurements, map the defects and propose a plan with costs for each category. Owners often save money by replacing the worst 20 percent and repairing the rest, and we show the options before committing.
For buildings that are likely to be redeveloped, a floor with a short remaining life may be better managed with repairs. For buildings in distribution center service, a stiffer floor may be worth the cost because it supports higher racking. We explain the trade-offs in plain terms and give you the data to make the call.
What moves the price
Area, depth and access set the base price. Thicker slabs cost more to cut and remove, and tight interior spaces limit equipment. Subgrade conditions are the most variable item: a section that needs two feet of undercut costs far more than one that needs only recompaction. Contamination handling is the largest swing item where it applies, and we price it as an allowance until sampling is done.
Operations also affect cost. Night and weekend work, tight sequencing and product moves are real costs, but so is downtime. We show the cost of a phased approach against a shutdown approach, and we price both so you can compare. For plants in metals and heavy industry, the floors face heat and impact, and the slab specification may include hardened toppings that add cost and extend life.
Map the slab before you cut it
Send us the floor plan, the problem areas and the racking or equipment plans. We will survey the slab, report on the subgrade and return a repair-or-replace plan with a sequence that keeps shipping.
Common Questions
How do I know whether to patch or replace?
Patch when the damage is at the surface or the joints and the subgrade is sound. Replace when panels are rocking, cracked through or settled, or when the base is failing. We map defects, test the subgrade and give you cost options for each approach.
Can the work be done while we keep operating?
Yes, in sections. We close a few aisles at a time, complete the cut, removal, repair and pour in a window and restore access when the slab reaches strength. Planning with your operations team keeps product moving.
What if the soil under the slab is contaminated?
We plan for it in older industrial areas. Sampling before demolition identifies the issue, and soil that tests above disposal limits is handled and hauled under a defined plan. We carry an allowance until results are in.
How long before forklifts can use the new floor?
Foot traffic can return in a day or two, but loaded forklift traffic should wait until the slab reaches the strength the engineer specifies. This often takes a week or more, longer in cold weather. We set the date in the schedule and post it at the zone.
Do you scan for conduit and tendons?
Always. Ground-penetrating radar locates reinforcement, conduit, drains and post-tensioned tendons before sawing. We mark the slab and keep the scan records with the project file.