TESLI EXTRA Basswood Tongue & Groove Sauna Board | Lumber – Premium Wood Cladding for Saunas and Interior Spaces

The TESLI EXTRA Basswood Tongue & Groove Sauna Board | Lumber is a high-end paneling material designed to elevate the style and functionality of saunas, steam rooms, wellness areas, balconies, and interior wall finishes. Made from solid basswood, this board is engineered for durability, elegance, and optimal performance in high-humidity environments.

The EXTRA grade quality ensures minimal knots (up to 3 mm / 1/8″) and a clean, refined appearance. Each board is hand-selected and undergoes strict quality control to deliver the highest visual and structural standards. The tongue & groove profile allows for quick installation with a seamless, polished look.

Key Features:

• Superior Basswood Material: Naturally cool to the touch, even in high-heat conditions, and perfect for moisture-rich environments
• Precise Dimensions: Working width: 80 mm (3 1/8″), thickness: 13 mm (1/2″), lengths from 1,900 mm to 3,000 mm (6’3″ to 9’10”)
• Tongue & Groove Profile: Ensures a secure, gap-free fit and easy installation
• Comfort & Safety: Low-density basswood provides a safe, pleasant surface in heated spaces
• Naturally Aromatic: Releases a light honey-like aroma that enhances sauna ambiance
• EXTRA Grade Quality: Minimal knots, hand-sorted boards with flawless finish and consistent grain
• Sap-Free Assurance: Free from sap, making it clean, durable, and easy to maintain

The TESLI EXTRA tongue & groove sauna board is a top-tier choice for anyone building or upgrading a custom sauna or interior wellness space. Now available for sale in the United States and Canada. Try our DIY sauna kit calculator to design a personalized sauna plan based on your space and style.