Saunainter
Building Kit 2 - Sauna Optimal, Alder
Building Kit 2 - Sauna Optimal, Alder
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The Saunainter Building Kit 2 — Sauna Optimal in Alder is an extended, comprehensive materials package designed for building a spacious, high-quality home sauna for 2–4 people. This kit provides all the core structural and finishing materials needed to create a beautifully lined, well-insulated sauna interior — with the warm, rich character of natural alder at its heart.
Alder is a premium sauna timber prized for its beautiful reddish-brown grain, natural moisture resistance and resin-free surface. It creates a warm, inviting atmosphere in any sauna interior and is exceptionally durable in the high-heat, high-humidity conditions of regular sauna use. The kit includes an increased volume of alder lining (132 pieces), a full pine frame, 37 sheets of Sauna-SPU thermal insulation and Tikkurila Supi Saunasuoja wood protection — everything precisely calculated for a 2–4 seat sauna.
Key Benefits
- Natural alder lining STP 15×90mm — rich reddish grain, moisture-resistant and resin-free
- 132 pieces of alder lining — increased volume for a spacious 2–4 seat sauna
- Full pine frame (45×45mm and 21×45mm) for a stable, durable structure
- 37 sheets of Sauna-SPU thermal insulation for high energy efficiency
- 2 rolls of aluminium tape (50mm × 50m) for a fully sealed, airtight installation
- Tikkurila Supi Saunasuoja 2.7L for long-term wood protection
- C4 galvanised mounting clips for concealed, secure fixing
| Capacity | 2–4 seats |
|---|---|
| Alder Lining | STP 15×90mm, 2100mm length — 132 pcs |
| Pine Frame | 45×45mm (2400mm) — 8 pcs; 21×45mm (2400mm) — 25 pcs |
| Thermal Insulation | Sauna-SPU — 37 sheets |
| Aluminium Tape | 50mm × 50m — 2 rolls |
| Wood Protection | Tikkurila Supi Saunasuoja — 2.7L |
| Fixings | C4 galvanised mounting clips 4mm with 2.5×16 screws — 4 packs |
| Brand | Saunainter |
| SKU | 17067 |
| Condition | New |
What's Included
- 132 x Alder lining STP 15×90mm — 2100mm length
- 8 x Pine frame 45×45mm — 2400mm length
- 25 x Pine frame 21×45mm — 2400mm length
- 4 x C4 mounting clips 4mm with 2.5×16 screws
- 37 x Sauna-SPU thermal insulation sheets
- 2 x Aluminium tape 50mm × 50m
- 1 x Tikkurila Supi Saunasuoja 2.7L
Assembly
This kit provides all core structural and lining materials for a 2–4 seat sauna. A heater, door, lighting and ventilation are not included — these can be sourced separately or as part of a complete building kit. Full assembly guidance is available on request. We recommend engaging a qualified electrician for any heater connections.
Questions before you buy? Contact our team — we're happy to help.
Delivery is typically made via pallet or kerbside courier, meaning your order will be delivered to the nearest accessible point at your property. Please ensure someone is available to receive and assist with unloading on the day of delivery.
For any delivery queries, please contact our team and we'll be happy to assist.
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