Collection: Balsa

Balsa is the lightest and softest timber used commercially, renowned for its exceptional buoyancy and efficiency as an insulator against heat and sound. This unique hardwood, native to tropical South and Central America, is now cultivated in tropical regions worldwide, including Papua New Guinea, Malaysia, Fiji, and Indonesia. With its fast-growing nature, Balsa trees reach up to 21 meters in height and 0.5 meters in diameter within seven years, reaching maturity by 12–15 years. Beyond this point, the wood tends to harden and lose its commercial appeal, sometimes even becoming waterlogged.

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Appearance of Balsa Timber

Balsa timber is typically white to oatmeal in color, sometimes with a pinkish hue near the heartwood in older trees. Most commercial Balsa is derived from the sapwood, which has a coarse and even texture due to its large, infrequent sap-conducting vessels. The grain is straight, providing a silky luster and a visually soft, uniform appearance, ideal for applications where aesthetics and lightweight properties are key.

Common Applications of Balsa Timber

Owing to its lightweight, insulating, and buoyant properties, Balsa is widely used in specialized fields. It is favored for surfboards, model making, laboratory mounting boards, and aircraft construction. Other common applications include ship and boat building, musical instruments, toys, turnery, and blockboards, as well as sporting goods and novelties that benefit from Balsa’s versatility and ease of handling.

Workability of Balsa Timber

Despite its softness, Balsa is highly workable and performs well with tools, provided that cutting edges are sharp to avoid crumbling. It can be nailed, though the holding power is minimal. Balsa is also highly absorbent, making it easy to glue, stain, and polish. However, kiln drying is preferred over air drying due to its high green moisture content (200-400%) and tendency to split if not processed quickly after felling.

Durability and Maintenance of Balsa Timber

Balsa is prone to insect attacks, including Anobium, termites, and longhorn beetles, and while the sapwood is permeable, the heartwood is resistant to impregnation. Older trees are often brittle and prone to decay, so younger Balsa wood is preferred for commercial uses.

Origin and Availability of Balsa Timber

Most of the world’s Balsa supply comes from Ecuador, which provides 80-90% of the global market. Balsa is widely available from hardware and arts and crafts retailers, allowing easy access for various applications that require this unique, lightweight timber.

 Very LowLowMediumHighVery High
 Check markCheck markCheck mark  
Tangential :  4.90%  
Radial : 1.80%   
Unit Movement Tangential: 0.27%   
Unit Movement Radial:0.10%    
 Very HighHighReasonably HighMedium HighMediumReasonably LowLowVery Low
Unseasoned:S1S2S3S4S5S6S7S8
      Check mark 
Seasoned:SD1SD2SD3SD4SD5SD6SD7SD8
      Check mark 
 Structural
No. 1
Structural
No. 2
Structural
No. 3
Structural
No. 4
Structural
No. 5
Unseasoned:F7F5F4  
Seasoned:F11F8F7F5F4
Seasoned:

 

160kg/m3

 

Unseasoned:

 

700kg/m3

 

 Very HighHighReasonably HighMediumLowVery Low
Unseasoned:J1J2J3J4J5J6
      
Seasoned:JD1JD2JD3JD4JD5JD6
      
 White, yellow, pale straw to light brownPink to pink brownLight to dark redBrown, chocolate, mottled or streaky
  
Check mark
Modulus of Rupture - Unseasoned:3.1 MPa
Modulus of Rupture - Seasoned:5.6 8.8-25.5 MPa
Modulus of Elasticity - Unseasoned:0.5 GPa
Modulus of Elasticity - Seasoned:1.8-6.4 GPa
Maximum Crushing Strength - Unseasoned: 
Maximum Crushing Strength - Seasoned:4.9- 17.6 MPa
Impact - Unseasoned: 
Impact - Seasoned: 
Toughness - Unseasoned:Low - up to 15 Nm
Toughness - Seasoned:Low - up to 15 Nm
Hardness - Unseasoned:1.6 (end)
Hardness - Seasoned:0.4, 2.4
 LowModerateReasonably HighHigh
 (0 - 5 yrs)(5 - 15 yrs)(15 - 25 yrs)(more than 25 yrs)
In-Ground:Check mark   
 (0 - 7 yrs)(7 - 15 yrs)(15 - 40 yrs)(More than 40 yrs)
Above ground:Check mark   
 (0 - 20 yrs, usually < 5)(21 - 40 yrs)(41 - 64 yrs)(More than 60 yrs)
Marine Borer Resistance:Check mark   
Lyctid Borer Susceptibility:Susceptible
Lyctid Borer Susceptibility - Other: 
Termite Resistance:Not Resistant