| Interior / Dry-Service Grade | Suitable for dry indoor conditions. Limited resistance to repeated humidity or liquid water. | Wall panels, cabinet faces, decorative furniture, and ceiling features in conditioned interiors. | Look for even veneer layers, tight joints, and an adhesive classification intended for dry conditions. Teak’s natural oils do not replace waterproof bonding. | Request documented legal timber origin and a recognized chain-of-custody certificate where responsible sourcing is required. | Usually selected for warm golden-brown color, straight or varied grain, and a smooth face suitable for clear finishing. | Choose this grade only when the panel will remain protected from condensation, leaks, and frequent cleaning water. |
| Moisture-Resistant Interior Grade | Handles occasional humidity better than dry-service panels, but is not automatically suitable for outdoor exposure. | Kitchens, bathrooms away from direct water, covered interior areas, and furniture exposed to intermittent humidity. | Confirm the panel’s stated bond class or test standard. Inspect edges for voids because open core gaps can allow water ingress. | Prefer low-emission panels with documented formaldehyde performance and traceable wood sourcing. | A- or B-grade faces generally provide a cleaner appearance; natural knots, mineral streaks, and color variation may still occur. | Use a compatible edge sealer and finish, especially around cut-outs, sinks, and fasteners. |
| Exterior / Weather-Sheltered Grade | Designed for humid conditions and occasional wetting when properly sealed and protected from prolonged exposure. | Covered balconies, sheltered doors, semi-outdoor furniture, boat interiors, and exterior decorative panels with adequate detailing. | Verify exterior-grade adhesive, bonded veneers, low core voids, and a manufacturer-declared durability or bond classification. | Check species identification, plantation or managed-forest documentation, chain of custody, and production-waste controls. | Teak face veneers can show strong grain variation; sample matching is recommended when several panels must appear uniform. | Seal all faces, edges, and penetrations. Design details must prevent standing water and allow drainage. |
| Exterior / High-Wet-Service Grade | Better suited to repeated wetting than interior panels, but performance depends on the certified adhesive system, construction, and finish. | Exterior joinery, frequently washed areas, sheltered marine components, and demanding humid environments. | Ask for water-resistance testing, veneer thickness, panel thickness tolerance, and evidence that the core remains bonded after wet cycling. | Prioritize certified legal sourcing and longer service life; a durable panel can reduce replacement frequency and material waste. | Select a face grade according to visibility: clear faces for premium joinery, or character-grade faces when knots and color differences are acceptable. | Do not rely on teak alone for durability. Use the correct coating system, fasteners, drainage, and maintenance schedule. |
| Marine / Structural Wet-Service Grade | Intended for demanding wet conditions when the panel complies with the required marine or structural specification. | Boat interiors, selected marine components, structural cabinetry, and applications requiring reliable bonded construction. | Confirm compliance with the project’s applicable marine standard, veneer quality, core void limits, glue-line durability, and structural calculations. | Use only legally documented teak and verify whether the certification covers both the face veneer and the core materials. | Surface quality is separate from structural performance; a premium-looking face does not by itself prove marine suitability. | Specify this grade only when the design, safety requirements, and exposure justify its higher performance and cost. |
| Decorative Teak-Faced Panel | Moisture resistance is determined mainly by the core panel and adhesive, not by the decorative teak veneer. | Feature walls, doors, furniture fronts, retail interiors, and architectural joinery where appearance is the priority. | Check face-veneer thickness, substrate grade, balanced construction, sanding quality, and whether the panel is suitable for the intended humidity. | Ask whether the teak is plantation-grown or responsibly managed and request documentation rather than relying on appearance alone. | Review color, grain direction, book-matching or slip-matching, patching, knots, sapwood, and acceptable natural variation before ordering. | Order a representative sample because photographs may not show natural differences between teak logs and veneer flitches. |