How and where to use guide
2440 x 1220 x 12mm Brazilian Elliottis Structural Pine Plywood CE2+ Class 3 C+/C EN314-2 EN636-2S EN13986EN13986
Typical applications and suitability
This plywood is engineered for structural sheathing roles where strength and stability are required. The 12mm thickness is commonly used as a substrate layer beneath flooring systems, as wall sheathing in timber-frame construction, and as roof decking in pitched roof assemblies. It is also suitable for general packing, cladding backing, and non-structural internal partitioning. The CE2+ grading and EN636-2S classification confirm suitability for use in humid conditions, including kitchens and bathrooms, provided adequate ventilation is maintained. The material is not suitable for permanent external exposure without protective cladding or coating.
- Floor substrates and joisted floor systems
- Timber-frame wall sheathing and bracing
- Roof decking and attic flooring
- Internal partition backing and general sheathing
- Packing and temporary site protection
Installation and handling on site
Store plywood flat and level on a dry, level surface away from direct weather exposure. Allow the boards to acclimatise to site conditions for 48 hours before fixing, particularly in heated buildings. When cutting, use a fine-toothed saw to minimise splintering and tear-out on the face veneer. Secure the boards using corrosion-resistant fixings appropriate to the application: ring-shank nails or structural screws are typical for wall and roof applications. Spacing between boards should allow for minor moisture movement, typically 2-3mm gaps. Ensure all cut edges and fastener holes are sealed with appropriate sealant or paint to prevent moisture ingress, particularly in damp environments.
- Store flat and protected from weather; allow 48-hour site acclimatisation
- Use fine-toothed saws for clean cuts; support boards during cutting
- Fix with corrosion-resistant fasteners at 150-200mm centres for structural applications
- Leave 2-3mm expansion gaps between boards
- Seal all cut edges and fastener holes with paint or sealant
Moisture and environmental considerations
The EN636-2S classification indicates this plywood is suitable for use in humid environments, but it is not a waterproof product. In wet areas such as bathrooms and kitchens, ensure adequate ventilation and avoid prolonged water contact. The E1 glue formulation minimises formaldehyde emission, making it appropriate for enclosed living spaces. However, the board itself will absorb and release moisture with changes in relative humidity, which can cause minor dimensional movement. This is normal and should be anticipated in design, particularly in large floor or roof areas where movement joints may be required.
- Suitable for humid internal environments with adequate ventilation
- Not suitable for permanent external exposure or direct water contact
- E1 glue meets low-emission standards for internal use
- Allow for minor moisture-related movement in large installations
Limitations and maintenance
This plywood is not rated for permanent external exposure and will degrade if left unprotected in weather. Do not use in ground contact or in applications subject to standing water. The product is combustible and should be treated with fire retardant if required by building regulations for specific applications. Once installed, the plywood requires no routine maintenance beyond ensuring that any protective coatings or sealants remain intact. If damage occurs during installation or in service, repair with appropriate wood filler or patching compound and reseal.
- Not suitable for permanent external exposure without protective cladding
- Avoid ground contact and standing water applications
- Combustible; apply fire retardant if required by building regulations
- Maintain integrity of surface coatings and edge seals