Properties of Blockboard
By Abhijit Phadke
By definition, blockboard is an engineered wooden board that consists of a core of softwood blocks (strips) lined edge to edge and sandwiched between layers of hardwood veneer on either side. In this article we will take a look at the important properties of blockboards.
Wooden blocks inside a blockboard bench revealed. Photographed at Navi Mumbai, India.
- These boards have good dimensional stability (even when exposed to humidity), and exhibit high resistance to warping or twisting.
- Also have a better ability to hold nails and screws, compared to other engineered boards such as particle boards or MDF (medium density fibre boards).
- Another important characteristic of blockboard is that it is light in weight, because the core blocks that form the bulk of the board are of softwood that has much lesser density and weight compared to hardwood. Because of having low weight it is easier to transport.
- Can be finished using paints, varnishes or can be laminated. With proper finishing such as by glueing laminates on its surfaces, blockboards can be made to appear exactly like their costlier counterparts viz. plywood
- Another feature of blockboards is that they can are also easy to work with for carpenters using their regular wood working tools. In contrast, carpenters find it very difficult to work with other engineered boards such as MDF or Particle boards as these types do not hold nails and only screws have to be used.
- These boards are made in MR-Moisture resistant grade, as well as BWP-Boiling water proof grade, for interior and exterior use respectively. The BWP variety uses superior glue (phenol formaldehyde), and is stronger with better resistance to water or humidity.
||600 to 625 kg/m3
|Nail holding strength
||70 to 100 kgs.
|Screw holding strength
||200 to 225 kgs
||measured in %
||8 to 10%
|Modulus of Elasticity
||5000 to 6000
|Modulus of Rupture
||50 to 60