How to build Sub-Floors
Each Block: $0.60

  1. Divide the area into a grid with 12" squares and mark with chalk lines
  2. Place a cube where lines intersect


  3. Use a paint brush to apply contact cement to the top of each cube.


  4. Place a 4' x 8' x 1/2" thick laminated plywood on top of the sponge rubber cubes. The cubes on the edge of each sheet should be shared by the next sheet of plywood.
  5. Lay several rows of the first layer of plywood.


  6. Place the second layer of 4' x 8' x 1/2" laminated plywood laying the opposite direction in order that seams on the first layer are not aligned with the seams on the second layer.


  7. Screw the two layers of plywood together by using #8 1 1/4" wood screws counter sunk into the plywood.


  8. Screw two sides of the mat border to the sub-floor creating a 90 degree corner which the tatami can be laid tightly against.
  9. Lay tatami tightly in the corner.
  10. Be sure to push the tatami together tightly to prevent gaps and shifting.


  11. Screw the remaining two boarders to the plywood sub floor locking the mats in place.
  12. To finish the sides of the sub floor, 2x4's laid on edge should be screwed to the existing floor around the perimeter of the new sub floor. Do not attach the 2x4's to the sub floor. Doing this will not allow the new floor to float


The result is a super fast surface offering the correct balance between stability, rigidity, rebound and shock absorbing properties.

Students RAVE About The Subfloor

"It makes landing on the tatami a joy."

"Now I'm not afraid of falling"

"I can throw harder and not be afraid of getting countered"

Instructors Love the Floor

"It provides a safe enviroment for students to excel faster and to their potential."

"We have less injuries and more enjoyable workouts."

"Now even beginners can practice more advanced throws"

"It's nice to know we are practicing on a world class fighting surface"


Slamfloor - Finished Subfloor $202.96

Hatashita has invested in producing a safe and technicaly advanced flooring system. Slamfloor. It is easy to install, portable and comes complete. No screws, no tools, no fuss, no mess. Hatashita has produced a high product that will ensure an investment that will last for years. Don't waste your time and money making a subfloor that doesn't work or won't last.

Price includes: 2 layers of 5'x5'x 3/8" cabinet grade plywood with blocks and Velcro preapplied.

Cabinet grade plywood has 7 layers of plywood making it much stronger and resiliant than your typical 5 layer plywood available at lumber stores. The 7 layers is important for a long lasting sturdy floor. 9mm (3/8") plywood is perfect for subloors. Thick enough to be sturdy but not so thick that the floors action is compromised. Two layers creates a fast and level surface.

Finished Plywood on both sides giving it a professional look. No splinters, no weak areas unlike low grade plywood.

Our wood is amongst the strongest plywood in the world and far superior to building grade found at most stores. The beautiful look and feel is a bonus to the strength and action that it delivers.

Prefinished subfloor make it easy! Hatashita supplies you with a pre-assembled floor. This means minimal construction time, manpower or messing around with tools. It's even portable and can be deconstructed and assembled in minutes. Assmbles quickly with Velcro strips preapplied to the plywood. The subfloor blocks come preapplied to the plywood making this the easiest, effective and most advanced subfloor on the market.

Click Here for Sub-Floor Installation


Slamfloor - Finished Subfloor - $202.96



Hatashita has invested in producing a safe and technicaly advanced flooring system. Slamfloor. It is easy to install, portable and comes complete. No screws, no tools, no fuss, no mess.

    Product Summary
  • 5'x5'x 3/8"- eliminates weak areas in your floor.
  • 7 layers of plywood- unmatched strength.
  • Cabinet grade finished 2 sides.
  • Tested and proven to last for years.
  • Preassembled means no screws.

2 layers of 5'x5' plywood for better strength and performance. The use of standard 4'x8' sheets creates weak and vulnerable points on your floor reducing the lifespan.

Cabinet grade plywood has 7 layers of plywood making it much stronger and resiliant than your typical 5 layer plywood available at lumber stores. The 7 layers is important for a long lasting sturdy floor.

9mm (3/8") plywood is perfect for subloors. Thick enough to be sturdy but not so thick that the floors action is compromised. Two layers creates a fast and level surface.

Finished Plywood on both sides giving it a professional look. No splinters, no weak areas unlike low grade plywood.

Select Wood: Our wood is amongst the strongest plywood in the world and far superior to building grade found at most stores. The beautiful look and feel is a bonus to the strength and action that it delivers.

Prefinished subfloor make it easy! Hatashita supplies you with a pre-assembled floor. This means minimal construction time, manpower or messing around with tools. It's even portable and can be deconstructed and assembled in minutes. Assmbles quickly with Velcro strips preapplied to the plywood. The subfloor blocks come preapplied to the plywood making this the easiest, effective and most advanced subfloor on the market.

Hatashita has produced a high product that will ensure an investment that will last for years. Don't waste your time and money making a subfloor that doesn't work or won't last.

Price includes: 2 layers of 5'x5'x 3/8" cabinet grade plywood with blocks and Velcro preapplied.




Slamfloor Blocks - $0.49



Build your own subfloor using our specially formulated foam cubes designed specially for martial arts subfloors.
To build the perfect Slamfloor you require approximately 1 block/square foot using our block.
We will provide you with precise block layout designs and instructions to make a professional subfloor.

Discounts available for quantities over 1000 pcs.





Subfloor Plywood only - $23.22



Hatashita has invested in producing a safe and technicaly advanced flooring system that is easy to install and is perfect for your club. To build a quality subfloor the raw materials must be the highest quality available.

    Product Summary
  • 5'x5'x 3/8"- eliminates weak areas in your floor.
  • 7 layers of plywood- unmatched strength.
  • Unique wood makes it strongest wood on the market.
  • Cabinet grade finished 2 sides.
  • Tested and proven to last for years.
  • Available preassembled means no screws or assembly.

5'x5' plywood for better strength and performance. Using 4'x8' sheets create weak and vunerable point in your floor reducing the lifespan of your floor.

Cabinet grade plywood has 7 layers of plywood making it much stronger and resiliant than your typical 5 layer plywood available at lumber stores. The 7 layers is important for a long lasting sturdy floor.

9mm (3/8") plywood is perfect for subloors. Thick enough to be sturdy but not so thick that the floors action is compormised. Two layers creates an even, fast and level surface.

Finished Plywood on both sides giving it a professional look. No splinters, no weak areas unlike low grade plywood.

Select Wood: Our wood is amongst the strongest plywood in the world and far superior to building grade found at most stores. The beautiful look and feel is a bonus to the strength and action that it delivers.

Prefinished subfloor make it easy! Hatashita can supply you with a pre-assembled floor. This means no construction time and can be simply laid down. It's even portable and can be deconstructed and assembled in minutes. Assmbles quickly with Velcro strips preapplied to the plywood. The subfloor blocks are preapplied to the plywood making this the easiest, effective and most advanced subfloor on the market.

Hatashita has produced a high product that will ensure an investment that will last for years. Don't waste your time and money making a subfloor that doesn't work or won't last.