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Derek Nielsen LLC does not pour concrete; we work with the given slab and create a beautiful, long lasting, very durable finished floor. Concrete finishing techniques and subcontractor awareness are essential to the process.

  • The majority of our jobs use a five-sack mix (3500 psi).
  • Do not use applied surface curing compounds.
  • Minimal usage of fly-ash is desirable.
  • Do not walk on slab before the surface is dry to avoid footprints.
  • On interior applications to achieve a polished, marble-like finish, the slab must be slick, hard, power troweled, by the concrete finishers.
  • On exterior applications to achieve a slip resistant, fossilized limestone-like finish, the slab must have a heavy rock salt finish. The coefficient of friction of the concrete surface is a direct result of the concrete finishing.
  • Concrete is a porous material similar to wood and is susceptible to staining. Do not write on slab with anything except pencil. The following substances are some examples of what may penetrate the surface and possibly stain the slab - red chalk, permanent markers, wax pencils, adhesives, flux, oils, gas, solder, primer, paint, stain, poly seal, caulk, PVC primer/cleaner, PVC adhesive, food, grease, beverages, coffee, coke, metal and nails/rust. Lumber, wood, boards, sawdust, plywood, thermo ply, press board, insulation board and plastic all draw moisture from the slab and if left can transfer resins, tannins and water stains to the slab.
  • Framers must cut wall plates for doors and cased openings ASAP Keep scored/stained concrete area swept and clean.
  • Be sure to warn all subcontractors that the slab will be a finished floor. Use a drop cloth when necessary.
  • Floor must be completely protected during primer, paint, stain or lacquer stages.
  • Protect the floor with 15# roofing felt, overlapped 6 inches and taped to each other.
  • DO NOT TAPE TO THE FLOOR. Painters may use blue tape or 24 hour tape and kraft paper to protect floor around walls. Drop cloths may be used to protect the field. 
  • DO NOT LEAVE BLUE TAPE OR 24 HOUR TAPE ON THE FLOOR FOR MORE THAN 24 HOURS. 

Application Schedule and Specifications

SCORING is performed 12 hours after the concrete finishers are gone up to 24 hours before framing begins. We must have one 110V outlet on a 20amp circuit breaker within 200' of furthest point on slab. Derek Nielsen LLC offers straight line, shallow scoring of grids and welcomes custom work such as deep scoring, wide scoring, twin blades, radius cuts, diamonds, various patterns, design layout and your ideas.

STAIN / PREFINISH Stain/Prefinish is applied immediately after dry-in, before insulation, sheetrock or masonry work including stucco. We must have two 110V outlets on two separate 20amp circuit breakers within 150' of furthest point on slab. We must also have clean water available on site. Derek Nielsen LLC offers a range of stain colors. The stain are applied in various ways to create more possibilities. The stain etches into the finished surface of the slab and lasts as long as the concrete finish. Derek Nielsen LLC welcomes custom work - multiple colors either individual or layered, intricate multi-colored patterns, templates, and your ideas.

FINAL FINISH Final finish is applied after all trades are completely finished (i.e. painters, carpet installers and clean-up crews). Any paint, stain, texture, etc. should be removed by the painters or cleaning crew prior to Derek Nielsen LLC's arrival. They may use water, paint thinner, scrapers, wire brushes, etc. Derek Nielsen LLC is not a cleaning crew and will assess additional charges for clean up at final finish (expensive). There will also be additional charges for work requested after final finish is completed. However, any additional work will be approved by the responsible party before the work is done and charges are incurred. Derek Nielsen LLC would prefer to apply final finish at least 24 hours prior to occupancy.