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 Grand Ebony.Charred timber. Six-seat capacity. Our flagship barrel sauna in Shou Sugi Ban ebony charred finish, seats six, heats in 25 minutes, built for Scottish winters. Request Your Estimate 07367 086350From £8,995 · Delivered & installed Overview ## Jonas Grand Barrel Sauna, Ebony. The Jonas Grand is the barrel we sell most often to buyers who want the whole family in one sit, 2.4m long, seating six comfortably on twin-tier benches, with a panoramic glass end wall that turns the sauna into a garden feature even when it's cold. The Ebony finish is a properly-executed Shou Sugi Ban charred spruce, flame-treated, brushed, and finished with a matte carbon-black oil. It's not paint. It's not stain. It's timber that will outlast a painted equivalent by decades and looks better as it weathers. Inside, everything is knot-free western hemlock, the industry benchmark timber for sauna interiors because it doesn't leach resin at temperature, holds its dimension, and stays comfortable to touch even when the air is at 90°C. Key features ## What makes it different. ### 6-person twin-tier bench Upper and lower benches in solid hemlock. Fits six adults comfortably or four sprawled out. ### Shou Sugi Ban ebony exterior Genuine charred and oiled spruce, deep matte black that weathers to graphite, not blotchy paint. ### Harvia electric heater (9kW) Finnish-made Harvia heater with rock cradle, cool-touch guard and digital control. 25-minute warm-up. ### Panoramic glass wall Full-height toughened glass panel and door, turns the sauna into a lantern at night. ### Hemlock interior throughout Knot-free western hemlock benches, backrests, floor duckboards and wall lining. ### 10-year timber warranty Shou Sugi Ban and internal hemlock warranted 10 years against splitting or delamination. Specification ## The numbers behind the object. Capacity6 adults External length2.4 m External diameter2.2 m Timber (exterior)Shou Sugi Ban charred spruce Timber (interior)Knot-free western hemlock HeaterHarvia electric 9kW (or wood-fired option) Heat-up time≈ 25 minutes Operating temp80–100 °C Power requirement3-phase 400V or 32A single-phase Weight (empty)≈ 700 kg Warranty10 yr structural Living with it ## How it actually works day to day. The charred exterior is the point of difference. It's a 400-year-old Japanese timber-preservation technique done properly with a controlled propane flame, carbonised to ~2mm depth, wire-brushed, then oiled. The carbon layer is the preservative; it needs no repainting. The barrel shape is not decorative. The curved roof means condensation runs down the walls instead of dripping on your head, and the compact air volume means the Harvia heats the space in about a third of the time a cube sauna needs. It runs on a 32A single-phase circuit that most Scottish domestic properties can provide with a subboard, or on 3-phase where available. We include the electrical routing plan in our quote and coordinate with your electrician, no vague 'you'll need to sort that.' Best for ## Who typically buys this one. - Larger families or entertainers who want six-person capacity - Contemporary garden schemes where the sauna is a design statement - Buyers who want the barrel form-factor with a dark, architectural finish - Rural and semi-rural gardens with the space for a 2.4m barrel On-site footage ## See it in motion. Still images only tell you so much. These short clips show the Jonas Grand Barrel Sauna, Ebony exactly as it sits in a finished garden, the details a spec sheet can't convey. ### Jonas Grand Ebony | full walkaround A slow walkaround of the Jonas Grand in ebony (Shou Sugi Ban) charred finish. Watch the interplay between the deep-black outer boards, the pale interior cladding, and the panoramic rear glass, this is exactly how it lands in your garden on install day. Real installations ## Jonas Grand 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. Is the ebony finish paint?No, it's Shou Sugi Ban, a Japanese charring technique. The exterior spruce is flame-treated, wire-brushed and oiled. The colour comes from the carbonised timber itself, not a topcoat, so it can't chip or peel. How long does it take to heat up? Does it need 3-phase power? Is a wood-fired heater available? How much space do I need? What maintenance does it need? Do I need planning permission? What's included in the price? Next step ## Ready to talk about the Jonas Grand Barrel Sauna, Ebony? 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