Know What You're Buying
Full specifications, what's in the box, and everything you need to plan your install.
PROSAUNAS Thermo-Spruce 2x4 S4SEE sauna bench material has a smooth refined finish and a traditional rustic charm with its characteristic rich amber color and highly figured knotty look. This wood profile features four smooth sides and softened edges for added comfort. This profile is perfect for benches, backrests, and floors.
Thermally modified spruce is highly desirable for use in saunas. Thermal modification is a completely organic process that uses heat, steam, and pressure to physically enhance the properties of the wood. Sauna wood that is thermally modified is more dimensionally stable, more water-resistant, has an ideal moisture content, and is far superior to untreated wood for resisting decay, pests, and harmful fungi.
PROSAUNAS carefully selects only the finest wood from Northern Europe and Canada, assuring that the quality and consistency of our wood selection is the best available. Our team has more than 55 years of experience crafting premium sauna rooms across North America, and we only offer wood that meets our exacting standards. Because of our total commitment to quality, we can ensure your wood order will arrive to your satisfaction.
Wood Sizing - Nominal vs. Actual Lumber Sizes: In North America, wood sizes are given in "nominal" measurements, which is the lumber’s size when it is cut from moist logs. After shrinkage from drying and surfacing, the actual size of lumber will be less than its nominal size. Please see the diagram for actual dimensions.
- Ideal for saunas
- Greater durability
- Resists warping
- Free from chemicals
- Eco-friendly
- Ideal moisture content
- Natural wood
- Can be combined with other profiles
| Species | Species | Spruce |
| Finish | Finish | Thermally Modified |
| Product Width | Product Width | 3.54" (90mm) |
| Product Thickness | Product Thickness | 1.05" (26mm) |
| Shipping Length | Shipping Length | Up to 10' |
Documentation for this product is available on request — contact us and we will send it over.
Frequently Asked Questions
Yes! Shop Pay Installments may be available at checkout, allowing you to split your order into interest-free payments. Just select Shop Pay at checkout to see your options.
Warranty coverage varies by manufacturer and product. Please refer to the product page or included documentation for specific details. Warranties are provided by the manufacturer. We're happy to help connect you with the manufacturer if you have a warranty question.
We ship within the contiguous United States only. We do not currently ship to Alaska, Hawaii, PO boxes, APO/FPO addresses, or international destinations.
No. Standard curbside delivery means the carrier delivers to the curb or end of your driveway only. The driver is not required to bring items into your home, garage, or backyard, and delivery does not include unpacking, assembly, or installation.
Yes. Our store is secured with SSL encryption and all payments are processed through Shopify's secure checkout. We never store your full credit card information.
Exchanges are handled on a case-by-case basis. Contact us at info@plungeintosaunas.com with your order number and the item you'd like instead. If approved, you may be responsible for price differences, return shipping, and any applicable restocking fees.