What is the difference between a formwork panel (panneau de coffrage) and formwork boards (planche de coffrage)?
A formwork panel is a structural plywood (cross-laminated veneers, WBP glue, usually film-faced) designed to withstand concrete pressure and be reused many times. Formwork boards (planche de coffrage) are sawn solid timber boards used for simple formwork and reusable only 2–3 times. Film-faced panels offer a lower cost per pour on medium- and high-volume sites.
Can you reuse a formwork panel?
Yes. A standard film-faced panel (120 g/m², EN 636-2) can be reused up to 15 times with proper maintenance. A premium panel with phenolic glue (EN 636-3) like Pro Form achieves up to 20 reuses. Factors that reduce cycle count: skipping release agent, failing to seal cut edges, storing in sun or rain, and using metal scrapers.
What panel thickness for a formwork wall?
18 mm is the standard for walls and columns with stud spacing of 400–600 mm. For tall walls (over 3 metres) or high-pressure civil engineering works, 21 mm provides better rigidity. 12 mm is suitable only for slab edges and small, low-pressure works.
What is film-faced plywood (contreplaqué filmé)?
Film-faced plywood is a structural plywood panel with both faces coated in a hot-pressed phenolic film. Available at 120 g/m² (standard) or 220 g/m² (premium), it creates a smooth, waterproof surface that eases concrete release and protects the panel against moisture. It is the most widely used formwork material on modern European construction sites.
Is CE marking mandatory for formwork panels in the EU?
Yes. The Construction Products Regulation (CPR) requires CE marking for wood-based panels placed on the EU market, per EN 13986. CE marking confirms the panel has been assessed and a Declaration of Performance (DoP) is available. Any panel sold in France without CE marking does not comply with regulations.
