Scientific Name: Tectona Grandis.
General Description: Straight-grained with a coarse, uneven texture, medium lustre and has an oily feel. Wood is yellow-brown to dark golden-brown heartwood with greyish-white sapwood. Teakwood contains silica and natural teak oils making the wood both dense and resistant to a wide range of harsh environments.
Density: Plantation teak exhibits equal densities to old-growth forests. This data is based on the USDA and the Forest Research Institute at Dehra Dun, India.
Specific Gravity: 0.66 at 12% Humidity
Janka Hardness/resistance: 1,155 lbs. (for reference the famous English Oak is 1,120 lbs.)
Stability: Radial Shrinkage: 2.6%, Tangential: 5.3%, Expansion Coefficient (important for flooring installation): 0.00185. For reference Red Oak is 0.00365 Both IPE and CUMARU (Tradename: Brazilian Teak) are far less stable choices for flooring.
Rot Resistance: extremely resistant to decay, heartwood rated as very durable. Resistant to termites, resistant to marine borers.
Workability: easy to work with in most regards. Due to up to 1.4% silica content, teak has a pronounced dulling effect on cutting edges. Despite high levels of natural oils, teak glues and finishes well. It is recommended to use glues like Tight bond 2 or 3 or Gorilla Glue.
Grain: generally straight but can be somewhat wavy or interlocked
End grain: ring or semi-ring porous with large solitary early wood pores and medium-small latewood pores.
Ring Density: spacing in plantation teak tends to be wider apart than in old-growth. Initial rings near centre tend to be wider spaced than younger rings near the outer edge.