Thermo Ash Sauna Wood Bench Boards 175mm (Pack of 4) by Finnmark Sauna

Our SHP sauna wood bench boards are a sustainable and durable product that create beautiful results in any sauna. The SHP bench board profile is stable and stylish without compromising on comfort.

About our Thermo Ash Bench Boards   

Thermo Ash/Fraxinus or more commonly used ash is very valuable, durable and strong wood with beautiful tree rings. It is said that ash is the oak’s younger brother, although the ash wood is even harder than oak. Natural ash has a slightly reddish tint and pleasant, but peculiar smell. Historically, the ash has been used for objects requiring durable wood such as carriages, and agricultural machines. Thanks to its beautiful texture, ash is nowadays used not only in the exterior, but also as furniture wood and in exclusive interior decoration.

During thermal modification ash achieves valuable properties for outdoor use, such as weather and rot resistance, better moisture and dimensional stability. Wood becomes more stable and resistant to the effects of the external environment, it removes resin and gives the material a exotic and beautifully deep brown color.

Thermo Ash SHP Sauna Bench Board Dimensions     

Our SHP profile is the standard timber profile for sauna bench boards, which is a rectangular profile with radiused corners, usually R2, R3 or R4 (2mm, 3mm or 4mm radii on each corner). The bench board radius value pertains to the smoothness of the board edge (e.g. R2 = 2mm radius on bench board edge). The 28mm thickness of the bench boards is important to prevent warping and twisting over time.

Key information on your selected product:

• Thickness: 20mm 
• Width: 175mm 
• Package Size: Pack of 4
• Radius: R3

Please note that as a natural product, timber has some colour variation between different packs and batches.

Wastage Allowance for Thermo Ash SHP Sauna Bench Boards

Our Thermo ash sauna timber is of A-grade quality, characterised by their durable, knot-free and low risk of splintering properties. As such, we recommend a wastage allowance of 15% for our thermo ash SHP sauna bench boards. This also takes into account any potential risk of damage that can occur during transportation.

Christmas and New Year's Shipping Update (Updated 2nd December 2025)

Please note the following changes to our pallet shipping and DPD delivery service on parcel orders over the Christmas period.

Our warehouse is fully closed for operation over the following days: Wednesday 24 December, Thursday 25 December, Friday 26 December, Wednesday 31 December and Thursday 1 January.

Orders requiring a pallet

The last dispatch date for orders requiring a pallet is Friday 19th December 2025. Pallet orders dispatched on this day must be booked and signed for with one of our sales team in advance.

Please note:

• Pallets dispatched on 19th December will be delivered on either 22nd or 23rd December, depending on your postcode
• We strongly advise against booking deliveries to the Highlands or Channel Islands close to the 19th December, as these may be held at the hub over the festive period
• There may be limited availability for pallet shipping on this day and we cannot guarantee that available slots remain

We will commence our regular pallet shipping service on Monday 5th January 2026.

If you have any questions about your pallet order, please get in touch with our Sales team: +44 (0) 20 8050 2895 or email info@finnmarksauna.com

Small Parcel Orders

DPD will deliver as normal up to and including Tuesday 23rd December 2025. Our daily cut-off for next day delivery is 2pm, with orders placed by 3pm on Tuesday 23rd December being our final dispatch before Christmas. Whilst we use a DPD Next Day delivery service, this is not a guarantee - please order earlier to avoid disappointment.

Limited dispatch service: We will dispatch DPD orders on Monday 29th December and Tuesday 30th December only during the festive closure period.

We will commence our regular delivery service on Monday 5th January 2026.

*Estimated delivery times are applicable to the UK mainland only (excludes Highlands and Islands). Additional delays and charges will be required for Non-UK Mainland and Highlands and Islands deliveries.