Beneath the durable bitumen roof shingles, the Mini Cabin Sauna is fitted with 50mm of high-density stone wool insulation, ensuring exceptional heat retention and energy efficiency. This advanced insulation layer keeps the sauna warm for longer while preventing heat loss through the roof — even in colder outdoor conditions. Stone wool is naturally fire-resistant, moisture-repellent, and sound-absorbing, making it the ideal material for a safe and comfortable sauna experience. Combined with the robust shingle roofing, it guarantees long-term durability and consistent warmth with every session.