For the formwork, not the first panel that comes across is suitable but only one that has greater bending strength. The boards should not bend under the concrete mass or break under its weight, and a large number of supports should not be used to strengthen them.
You can purchase formwork panels for sale if you know where to look for them and what you need.
Experts from Rezult recommend choosing panels from larch, fir, and teak for formwork because these types of wood will ensure durability and increase its service life. In addition:
- The surface should be smooth, which is achieved by lamination so that after the concrete has hardened, the formwork can easily be detached.
- The moisture resistance is necessary to prevent the wood material from getting wet from the moisture that is in the concrete solution.
- The average value of the thickness is 1-1.2 cm. For pouring a thick concrete layer, an 18-mm panel should be chosen.
For multi-cycle formwork, panels with an increased level of strength will be the best choice.
Types of panels for formwork
There are several kinds of panels, but not all are suitable for the manufacture of building formwork. Consider the most popular:
- Veneer material glued with phenol-formaldehyde resin-based glue. The main quality is moisture resistance. On the cut, there is a darkish tint due to the water-repellent layer of the material.
- Aviation birch plywood is glued with albumin-casein glue, which is safe for humans, but the water resistance of such material is low.
- Laminated plywood is best suited for the production of formwork.
- Bakelite plywood is also used for formwork and provides resistance to aggressive environments and high strength of the material.
At last, the use of shuttering boards makes it possible to obtain an even, smooth concrete wall, provides easy separation of building auxiliary forms from hardened concrete, and does not require additional leveling efforts.