A new hardwood floor?

For worry free, quality installation and refinishing, contact the hardwood floor specialists at Dave's Floor Sanding & Installing, Inc.

Hardwood Floor Refinishing

from floor to finish, we've got it covered.

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A new hardwood floor?

From a cabin in the woods to corporate meeting rooms, Dave's has a hardwood thats just right for you.

Hardwood Floor Sanding

A new hardwood floor?

If you've lived in the Minneapolis/St. Paul Metro of Minnesota, you've probably seen one of our hardwood flooring trucks traveling down the road, en route to one of our many customers.

Hardwood Floor Repair

Janka Hardness Scale

The Janka hardness test measures the hardness of wood. It measures the force required to embed an 11.28 mm (0.444 in) steel ball into wood to half the ball's diameter. This method leaves an indentation. It is a good measurement technique to determine the ability of a type of wood to withstand denting and wear. Itʼs also a good indicator of how resistant it is to sawing and nailing.

The hardness of wood varies with the direction of the wood grain . Testing on the surface of a plank, perpendicular to the grain, is said to be of "side hardness." Testing the cut surface of a stump is called a test of "end hardness."

The results are stated in various ways, which can lead to confusion, especially when the name of the actual units employed is often not attached. In the United States, the measurement is in pounds-force (lbf). In Sweden it is in kilograms- force (kgf), and in Australia, either in newtons (N) or kilonewtons (kN). Source: Wikipedia

Wood Flooring Species
Janka Hardness (pounds force)
Palo Santo
4500
African Pearlwood / Moabi
3680
Bolivian Cherry
3650
Lapacho
3640
Cumaru / "Brazilian Teak" sometimes: "Brazilian Chestnut," "Tiete Chestnut," "SouthAmerican Chestnut," "Southern Chestnut"
3540
3220
Yvyraro
3040
Bloodwood
2900
"Southern Chestnut"
2670
Brazilian Cherry / Jatoba
2350
Mesquite
2345
"Golden Teak"
2330
Brushbox
2135
Karri
2030
Sydney Blue Gum
2023
Bubinga
1980
Cameron
1940
Tallowwood
1933
Merbau
1925
Amendoim
1912
Jarrah
1910
Purpleheart
1860
Bangkirai
1798
Rosewood
1780
African Padauk
1725
Merbau
1712
Kempas
1710
Black Locust
1700
Highland Beech
1686
Tualang
1624
Zebrawood
1575
Peroba
1557
Kambala
1540
Curupixa
1490
Sweet Birch
1470
Caribbean Walnut
1390
Coffee Bean
1390
Australian Cypress
1375
White Oak
1360
Ribbon Gum
1349
American Beech
1300
Caribbean Heart Pine
1280
Movingui
1230
Heart Pine
1225
Larch
1200
Teak
1155
Cocobolo
1136
Sakura
995
Boire
940
Paper Birch
910
Eastern Red Cedar
900
African Mahogany
830
Parana
780
Sycamore
770
Shedua
710
Douglas Fir
660
Western Juniper
626
Alder (Red)
590
Larch
590
Chestnut
540
500
Western White Pine
420
Basswood
410
Eastern White Pine
380
Balsa
100
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