Information Hardwood

Stability of Wood Print E-mail
The numbers in the chart reflect the dimensional change coefficient for the various species, measured as tangential shrinkage or swelling within normal moisture content limits of 6-14 percent. Tangential change values will normally reflect changes in plainsawn wood. Quartersawn wood will usually be more dimensionally stable than plainsawn.
The dimensional change coefficient can be used to calculate expected shrinkage or swelling. In actual practice, however, change would be diminished in a complete floor, as the boards’ proximity to each other tends to restrain movement. What all this is really saying is that the lower the change coefficient, the less your floor will move and the less your floor moves, the better. {gallery}3{/gallery} Although some tropical woods such as Australian cypress, Brazilian cherry, merbau and wenge appear in this chart to have excellent moisture stability compared to domestic oak, actual installations of many of these woods have demonstrated significant movement in use. To avoid problems later, extra care should be taken to inform potential users of these tendencies prior to purchase.


Change Coefficient































Brazilian Cherry








White Oak


Red Oak







Janka Explained Print E-mail
{tab=What is the Janka Harness?} If you ask your self what is all about the Janka Hardness will explain that The Janka Hardness is a test In wich we measure the hardness of the wood.

{/tabs} In the Janka Hardness test Floors in california measures the force required to push a steel ball with a diameter of 11.28 millimeters ( 0.444 inches )into the wood to a depth of half the ball's diameter (the diameter was chosen to produce a circle with an area of 100 square millimeters).

In the past the Janka harness test were expressed in units of pressure, but when the American Society for Testing and Materials standardized the test it called for results in units of force.

{tab=We going to explain and illustrate 3 Janka hardness}{/tabs} Janka Hardness Domestic wood species This janka hardness test show you the results on 12 of the most common domestic wood species
Janka Hardness of Imported wood species.

In this Janka Hardness you will learn about the 21 most common imported wood species.

Janka Hardness of other wood species.
In this table you will learn the rates on the Janka Hardness for the other wood species.
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  1. We inspect the floor making sure are clean and ready to go!
  2. We make sure all your property is well cover!
  3. Prep work if needed help with the moving of furniture Etc.
  4. Belt sander coarse cut, 36 grit to remove it all
  5. Edger sander coarse cut, 36 grit for the hardw to reach areas.
  6. Identify damages parts. Get client's approval for replaces. Make replaces.
  7. Edger sander medium cut, 50 or 60 grit.
  8. Set exposed nail heads.
  9. We apply wood filler over entire floor this reduces noises.
  10. Belt sander medium cut, 50 or 60 grit ( to remoce excess dry filler).
  11. Edger sander fine cut, 80 or 100 grit.
  12. Set newly exposed nails.
  13. Hand scrape corners and hard to reach areas
  14. Scrape corners and other areas inaccessible for the rest of the equipment!
  15. We inspect the floors making sure look great, and Vacuum them!
  16. Set newly exposed nails yeah
  17. Fine screen with buffer, 100 to 120 grit
  18. Clean and vacuum floor thoroughly
  19. Apply coat of finish.Yeah finally
  20. Screen floor with buffer. Vacuum
  21. Apply second coat of finish
  22. We make sure all looks great! and meet or exceed the standars of quality of the NWFA, final coating is apply after a 220 grit screen sanding to make a super smooth finish yes
  23. Now you enjoy your new great wood floors ! great



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Oakland wood floors full line in re-finishing hardwood floors, solid wood flooring, engineered wood floor re-surface and more! Oakland, Berkeley and the rest of the Bay area and San Francisco.

  • Sanding, staining and finishing existing hardwood
  • Installation of engineered, solid, pre-finished or unfinished hardwood, parquet, laminate, bamboo, cork tile
  • Wood floor bleach
  • Floating, nail and glue down methods
  • Installation of stair treads and risers
  • Water damage repairs
  • Hardwood floor conditioner
  • Flooring maintenance
  • Flooring demolition, cleaning and hauling

Wood floors add beauty and value to your house, sanding and refinishing is the best way to enhance and preserve that beauty. Sometimes, a floor with shallow scratches or a dull surface only needs a top coat of finish.


If you want to repair some damage areas in your wood floors, replace some wood boards, or removed some scratches on your old wood floors, Oakland wood floors can help you, we are flooring professionals in the bay area and San Francisco just call us today at 866-670-1239 and set up your free consultation !

Our work ethic is simple: We craft every floor as if it were our own, treat each customer professionally and provide unsurpassed Flooring craftsmanship and attention to detail. We are among one of the fastest flooring companies in the bay area & San Francisco from Walnut Creek to Redwood City we are one of the prefer flooring companies for contractor, real estate agents & commercial business.

Sanding & refinish Wood flooring
Wood floor sanding and refinish in the Oakland and Berkeley area

Oakland Hardwood Floors takes time to listen to you, answer your questions and explain the preparation, processes and pricing.

Hardwood Floor Refinish Test:

  • Go to a high-traffic area where the wood floor takes the most abuse. Add a tablespoon of water onto the floor. If the water forms beads, the wood floor is properly sealed. At most, cleaning and maintenance is needed.
  • If the water takes a few minutes to seep in and only darkens the floor slightly, the finish is partially worn. Don't wait too long to refinish the floor or at least add and extra floor coating ( buffing )
  • If the water soaks right in and leaves a dark spot, it's definitely time to refinish just call 866-670-1239 to set up your free consultation

Some of the benefits of working with us!

  • Eliminate Dust, dustless sanding system combines the power of an industrial strength vacuum engine to its sanding equipment, removing airborne dust generated from the sanding process
  • Member BBB
  • Member National Wood Flooring Association (NWFA)
  • Project Managers
  • We love to transform old hardwood floors
  • Great low prices starting $1,79 sqft and high quality professional materials
  • No extra cost for weekends
  • Professionals flooring crews
  • Short notice ok
  • Satisfaction guaranteed
  • Free estimates just call us 866-670-1239

Hardwood is the most practical of all floor materials. But after the years, the protective Clear coat may wear off, most noticeable in heavy traffic areas. This is the perfect time to refinish your wood flooring. Applying a modern new finish can even make hardwood floors much easier to maintain than when they were originally installed. Set up a free Sanding & refinish consultation here... Located in Alameda County, serves the greater Bay Area including Contra Costa, San Francisco, Santa Clara as well as the Tri Valley and North Bay areas. Other nearby metro areas are welcome.

A good reason to refinish your hardwood floor is to freshen up the finish of a wood floor that's dulled from being hidden under carpet for years.

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  • Residential
  • Commercial
  • Industrial.
  • Fast refinish
  • VOC compliant
  • Residential
  • Residential
  • Hardwood floor installation
  • Hardwood floor design
  • Hardwood floor Bleach
  • Hardwood floor refinish by hand (Hand scrape)
  • Color and flooring matching
  • Importation of Exotic Wood floors from any part of the world!
  • Short notices ok
  • Special design and colors


  • Member NWFA
  • Member of honor BBB
  • Net working with More Group.
  • Member wonder woman project

Benefits of Service

  • 24 hour service
  • Satisfaction Guaranteed.
  • 24 Hour Service
  • Not Extra cost for weekends
  • Written Flooring Bids
  • Written Flooring Guarantees
  • Fast Flooring service
  • Trained Flooring Professionals
  • Quality Flooring Materials
  • Free Material delivery
  • Family Discounts
  • Free products for referrals
  • Not Extra cost for weekends
  • Satisfaction guarantee
  • No money up front!
  • Projects managers at not cost to you!
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Oakland Wood Floors