- Demolition and disposal define the starting point
- Subgrade condition controls support work
- Drainage and elevations drive geometry
- Thickness and reinforcement require a detail
- Joints manage predictable movement
- Access changes placement method
- Formwork and edges create labor beyond area
- Testing and inspection should match project risk
- Batch size and placement sequence affect the finish
- Connections to existing work need measured details
- Adjacent restoration belongs in the finished scope
- Masonry assemblies need unit, mortar and water details
- Finish standards need a sample or description
- Weather and curing are production steps
- Closeout should verify drainage and finish
Concrete and masonry cost in Gresham changes with demolition, excavation, soil and drainage conditions, geometry, access, reinforcement, mix or unit selection, finish, weather protection and restoration. Square footage alone cannot describe those decisions. Measure the work, document site conditions and issue one detail set before comparing contractor totals.
Demolition and disposal define the starting point
Record existing thickness, reinforcement, coatings, access and adjacent surfaces. Identify sawcut boundaries and materials that must remain. A removal line should include loading, disposal and protection, not only breaking the visible slab or wall.
Subgrade condition controls support work
Soft soil, fill, roots and saturated areas may require excavation, stabilization or drainage correction. Define proof, compaction and aggregate requirements with the project designer when appropriate. New concrete cannot compensate for an unstable or poorly drained base.
Drainage and elevations drive geometry
Survey thresholds, foundations, walks, grades and discharge paths. Record slope direction and finished elevations before forming. Water should not be redirected toward buildings or neighboring property. Small elevation errors can create standing water or inaccessible transitions.
Thickness and reinforcement require a detail
State slab or wall thickness, reinforcement, edge conditions, dowels and connections based on intended loading and design. ACI guidance emphasizes that slab performance depends on design, materials, construction and curing together. “Standard concrete” is not a complete structural specification.
Joints manage predictable movement
Map isolation, construction and contraction joints around corners, penetrations and fixed structures. Define timing and method. Joint planning should happen before placement; random cracking is not an acceptable substitute for an omitted layout.
Access changes placement method
Truck reach, pump distance, wheelbarrow routes, overhead lines, slopes and occupied access affect equipment and crew planning. Confirm washout, staging and protection. A difficult route can add labor and change how quickly material must be placed and finished.
Formwork and edges create labor beyond area
Steps, curves, thickened edges, grade beams, openings and tight transitions require more layout, forming and bracing than an open rectangle. Dimension every edge and elevation and identify which forms remain exposed. Linear feet, corners and elevation changes can explain scope differences that a square-foot comparison misses.
Testing and inspection should match project risk
Where design or authority requirements call for inspection or testing, assign scheduling, access, samples and reporting before placement. Record what happens if results fall outside the accepted criteria. Even when formal testing is not required, document delivery information, placement conditions and reinforcement before it disappears.
Batch size and placement sequence affect the finish
Divide larger work into placements that the crew can place, consolidate, strike and finish within the material and weather limits. Show construction-joint locations and how successive placements connect. Confirm truck intervals, pump setup and backup access before ordering material. A rushed oversized placement can create cold joints, uneven finishing or missed details, while too many unplanned small placements can add mobilization and visible transitions.
Connections to existing work need measured details
New slabs, walls, steps and veneers often meet existing concrete, masonry, framing or cladding. Survey the interface and specify dowels, isolation, flashing, sealant, bearing and movement treatment as applicable to the design. Do not assume that tying new work rigidly to old work is always correct. Pricing a documented connection helps bidders include drilling, anchors, edge repair and water management instead of treating those tasks as discoveries.
Adjacent restoration belongs in the finished scope
Excavation and placement can disturb irrigation, planting, paving, siding, fences and interior access. Map protection and restoration limits before work. A concrete subtotal is incomplete if grading, topsoil, sealant, trim, landscaping or cleanup remains an unassigned owner task.
Masonry assemblies need unit, mortar and water details
For block, brick or veneer work, record unit size and appearance, mortar specification, reinforcement, flashing, weeps, caps, anchors and control joints as applicable. Define the approved sample and cleaning method. A wall price that names only square footage leaves its structure, drainage and visible finish unresolved.
Finish standards need a sample or description
Specify broom direction, trowel level, exposed aggregate, color, sealer and edge treatment. Existing surfaces may not match new work exactly. Record the accepted sample or realistic match standard before placement because finish disputes are difficult to correct afterward.
Weather and curing are production steps
Temperature, rain, wind and direct sun affect placement and moisture loss. Require a weather and curing plan consistent with the selected material and specification. Protect fresh work and restrict traffic until the responsible contractor's release condition is met.
Closeout should verify drainage and finish
Inspect dimensions, elevations, slope, joints, edges, surface consistency and adjacent restoration. Keep mix or product records, reinforcement photographs, permits and inspections when applicable, approved changes, curing instructions and warranty before final payment.
Frequently asked questions
Why is square-foot pricing incomplete?
It omits demolition, soil, drainage, geometry, access, reinforcement, joints, finish, curing and restoration.
What should be checked before forming?
Confirm excavation, support, drainage path, elevations, dimensions, reinforcement and interfaces.
How is hidden soil risk handled?
Use investigation, defined remediation criteria and written approval rather than an open-ended allowance.
Why do joints matter?
A planned joint layout helps manage movement and separates concrete from fixed structures.
Does weather affect the schedule?
Yes. Placement, finishing, protection and curing must fit actual conditions and the material specification.
What belongs in closeout?
Keep dimensions, drainage and finish checks, product records, reinforcement photographs, permits, changes and curing guidance.
Sources and local guidance
- Building and PermitsCity of Gresham
- Consumer ToolsOregon Construction Contractors Board
- Guide to Concrete Floor and Slab ConstructionAmerican Concrete Institute