Beancross Rd, Polmont, Falkirk FK2 0XS Open today · 9am–5:30pm 07367 086350 07861 958262 AboutAbout Our story & team Reviews Verified Google reviews Garden RoomsAll Garden Rooms Explore the full range Home Offices Work-from-garden studios Garden Gyms Private fitness spaces Garden Bars & Lounges Entertain in style Annexes & Guest Rooms Extra living space SaunasBarrel Saunas Jonas Grand From £8,995 Jonas Grand From £8,995 Jonas S From £6,495 Jonas Teak From £6,995 Joris Grand From £9,495 Teak From £8,495 Cube Saunas Ebony From £10,995 Ebony From £10,495 Ula Classic Beige Full-Glass From £9,995 Ula L From £11,495 Ula L From £12,495 Ula Micro From £8,495 Ula Mini From £8,995 Ula Mini From £9,495 Ula Mini From £9,295 Modular Saunas Celsium Herkus L From £12,995 Tauras Grand Ebony From £16,995 Tauras Modular Air with Aiste Grand Hot Tub From £19,995 Hot TubsAll Hot Tubs Wood-fired thermowood soaking tubs Aiste Grand From £6,995 Benas From £5,495 Log CabinsAll Log Cabins 30 designs, 34mm to 68mm walls Cabin Range & Prices Full 2026 price list Cabin Photo Gallery Real Scottish installations Sheds, Garages & Summerhouses From £500, installed 2026 Shed Price List Sheds, garages, playhouses Glamping & Residential Cabins Pods, barrels & lodges Other ServicesBBQ Huts Year-round outdoor cooking Glamping & Residential Holiday-let & annex builds Sheds, Garages & Summerhouses From £640, installed Outdoor Kitchens Built for Scottish weather Composite Decking Low-maintenance decks Bespoke Design Service Full design & build Our WorkRequest Estimate Barrel Saunas # Jonas Teak.Built for Scottish winters. The mid-sized Jonas barrel in warm teak-oiled thermowood, installed and photographed through a Scottish snow winter to prove the finish holds up. Request Your Estimate 07367 086350From £6,995 · Delivered & installed Overview ## Jonas Teak Barrel Sauna. The Jonas Teak barrel is the model we photograph most often in the depths of a Scottish winter, because the whole point of a garden sauna is that it works when the weather turns, and honey-toned thermowood photographs beautifully against snow. It's the mid-size Jonas, larger inside than the S, more compact than the Grand, comfortably seating four to five adults on twin-tier hemlock benches, with the same panoramic glass end wall you get on the flagship. Exterior is thermally-modified spruce with a saturating Danish teak oil finish. Interior is knot-free western hemlock. Heater is a Harvia 8kW electric, sized precisely to the internal volume for a 25-minute cold-to-soak warm-up. Key features ## What makes it different. ### 4–5 person capacity Twin-tier hemlock benches accommodate 4 comfortably or 5 socially. ### Teak-oiled thermowood Kiln-modified spruce with saturating teak oil, warm honey tone that suits traditional Scottish gardens. ### Harvia 8kW electric heater Right-sized for the mid-volume barrel, 25-minute warm-up, quiet running. ### Panoramic glass front Full-height toughened glass end wall and door. ### Winter-tested Every unit is temperature-cycled before dispatch. Thermowood is stable to -30°C. ### 10-year timber warranty Structural warranty on the thermowood shell and hemlock interior. Specification ## The numbers behind the object. Capacity4–5 adults External length2.2 m External diameter2.1 m Timber (exterior)Thermowood spruce, teak-oiled Timber (interior)Knot-free western hemlock HeaterHarvia electric 8kW Heat-up time≈ 25 minutes Operating temp80–100 °C Power requirement32A single-phase Weight (empty)≈ 640 kg Warranty10 yr structural Living with it ## How it actually works day to day. Thermowood is a genuine cold-climate material. The kiln modification process bakes out the moisture and resins that make untreated softwood swell, split and rot, leaving a timber that's dimensionally stable to -30°C and doesn't need annual sealant coats. In real Scottish winter use, this matters. Owners report zero movement in door frames, no ice-cracking around the glass, and a sauna that reaches soaking temperature in the same 25 minutes at -5°C as it does at +20°C. Teak oil is a maintenance choice, not a structural requirement. Re-oil every 2 seasons for the warm tone, or leave it and let the timber silver, both are fine. We supply the correct oil at handover and demonstrate application. Best for ## Who typically buys this one. - Rural and semi-rural properties with real winter weather - Owners who value the classic warm-timber look over black - Buyers wanting mid-size (4–5 person) capacity without stretching to a Grand - Holiday lets and short-stays where the sauna is photographed year-round Real installations ## Jonas Teak in Scottish gardens. Every photograph on this page is a genuine Signature Garden Rooms installation. Frequently asked ## Straight answers. If your question isn't listed, call Ryan on 07367 086350. How does thermowood cope with Scottish winters?Very well. Kiln modification bakes moisture and resins out of the timber, leaving it dimensionally stable down to -30°C. We temperature-cycle every unit before dispatch and have installs on the Fife coast and in Perthshire that have been through six winters without measurable movement. How long does it take to heat up? What power do I need? How often do I need to re-oil? How much space do I need? Can four adults sit comfortably? Do I need planning permission? Do you offer a wood-fired heater option? Next step ## Ready to talk about the Jonas Teak Barrel Sauna? Tell us your garden, your access, and roughly when you'd like it in. We'll come back with a considered price, honest lead time, and any planning notes for your site. Request Your Estimate 07367 086350 Fully insured · £5m public liability · Falkirk-based, working across Central Scotland Explore the site ## Popular pages & service areas Other services - insulated bespoke garden rooms in Falkirk - premium log cabins in Central Scotland - Nordic BBQ huts for Scottish gardens - saunas and hot tubs supplied and installed - outdoor kitchens built for Scottish weather - composite decking installers near you - timber sheds, garages and summerhouses - bespoke garden building design and build - garden rooms in Falkirk - garden rooms in Stirling - garden rooms in Glasgow - garden rooms in Edinburgh - garden rooms in Livingston - garden rooms in Dunfermline - recent installs across Central Scotland - verified Google reviews (4.6★) Bespoke, fully-insulated garden rooms designed and built across Falkirk and Central Scotland. Explore - Garden Rooms - All Services - Our Work - Service Areas - About - Reviews Contact - Beancross Rd, Polmont,Falkirk FK2 0XS - 07367 086350 - 07861 958262 - ryan@amrgardenbuildings.co.uk Opening hours - Mon – Fri9:00 – 17:30 - Saturday9:00 – 17:00 - Sunday9:00 – 16:00 Leave a Google review © 2026 Signature Garden Rooms. All rights reserved. · Formerly AMR Garden Buildings · Owned and run by Ryan Meldrum PrivacyCookiesTermsContact CallRequest Estimate