The Swedes then set their sights on another key feature of their hot tubs: the cladding. Red cedar was a popular choice of wood for this purpose, yet importing it all the way from Canada did not fit within their vision for sustainability. Preferring to continue looking for a viable option closer to home, they were rewarded for their persistence. To this day, Skargards still uses eco-certified pine wood sourced from Scandinavia that has been heat-treated, also known as ThermoWood. The environmentally-friendly thermal process confers strong weather and mould-resistant properties that match the durability of the fibreglass tub.
Last but not least, they needed to find the optimal material for their wood stoves. Early versions were made of aluminum, a low-cost material that transfers heat better than stainless steel. Yet they discovered that the effectiveness of the aluminum stove quickly decreased over time due to tar build up. Corrosion was a recurrent issue as well. Having learned their lesson, they invested in high-grade AISI 316 stainless steel instead, thus ensuring long-term durability and performance. And because it is sturdier than aluminum, it could be moulded into thinner stove walls in order to achieve the same level of heat transfer.
With all the pieces of the puzzle, Skargards finally had two premium wood-fired hot tubs in its product lineup as of 2007.