By Rolanas Kutra, Eurodita Catalog Manager | Last updated: April 2026
Wall thickness in log cabins directly determines thermal performance, structural capacity, regulatory eligibility and price positioning. Eurodita, based in Kaunas, Lithuania and founded in 1994, manufactures 12,000+ private-label log cabin kits annually across 13 wall-thickness categories and 210 catalog products, supplying 200+ active dealers across 38 countries. For dealers, choosing the right thickness is the single biggest lever for matching a cabin to the customer’s use case, climate and local regulation — and for protecting your margin.
What Wall Thickness Means for Log Cabin Performance
In log-cabin manufacturing, “wall thickness” refers to the depth of the machined log profile that forms the external wall. It is measured at the narrowest point of the log between the tongue and groove, and it is the first number any experienced dealer should ask about when scoping a project.
Two construction families exist:
- Single-skin solid log walls — one layer of tongue-and-groove machined timber (from 19 mm sheds up to 88 mm heavy-gauge residential profiles, and 135–220 mm engineered glulam beams for full residential builds). The log itself is both the structure and the weather envelope.
- Double-skin (Twin Skin) walls — two parallel thinner skins (Eurodita builds 44 mm inner + 44 mm outer) separated by a 50 mm insulation cavity. The overall wall assembly is 138 mm and is specified as 44-50-44. This construction decouples thermal performance from log depth and is the closest a log cabin comes to a conventional timber-frame house in terms of year-round habitability.
Three reasons thickness matters for a B2B dealer:
1. Regulatory compliance. UK mobile homes intended for permanent residential use must meet BS 3632:2015, which effectively rules out thin single-skin walls. Engineered glulam structural products fall under EN 14080. UK Permitted Development rules for outbuildings impose height and footprint limits that are not thickness-dependent, but thicker walls reduce internal floor area — relevant when a customer is building right up to a 2.5 m eaves or 15 m² outbuilding limit.
2. Customer use case. A 19 mm garden shed and a 220 mm glulam residential house sit at opposite ends of the spectrum. A dealer who sells a 28 mm summer cabin to a customer who wants to live in it year-round will be handling warranty calls every winter.
3. Price positioning. Thickness correlates closely with kit price, kit weight (shipping cost) and installation complexity. The 44 mm band is the volume category — 85 of our 210 products sit here — because it is the sweet spot for garden offices, hobby rooms and holiday cabins. Moving a customer up one band (44 → 58 → 70) or across to Twin Skin is the standard upsell path.
See our log cabin insulation guide for year-round use for complementary guidance on pairing wall thickness with roof and floor insulation.
Eurodita’s 8 Wall Thickness Categories for B2B Dealers
Our WP catalog taxonomy (verified 2026-04-21) lists 13 thickness values. For dealer-facing planning we group them into eight functional bands:
28 mm — Summer cabins and seasonal use (31 products)
Lightweight single-skin profile. Typical applications: holiday cabins, summer houses, seasonal rental pods, playhouses, light garden offices used spring–autumn. Fast to erect, lowest shipping weight, entry-price point. Not suitable for year-round residential use in cool climates. Example: Log Cabin Ryan 3x2m.
44 mm — The dealer volume category (85 products)
Our largest band and the default recommendation for most garden-range customers. Self-supporting across typical UK/EU garden cabin footprints. Used for garden offices, home gyms, summer houses with heating, larger hobby cabins. In mild climates, 44 mm can support year-round home-office use with supplementary insulation. Example: Log Cabin Lewis 5x4m.
44-50-44 Twin Skin — Insulated double-wall (13 products)
Two 44 mm skins with a 50 mm mineral-wool cavity. Total wall depth 138 mm with a dedicated insulation layer. The dealer’s best answer when a customer wants a year-round cabin without moving up to glulam pricing. Covered in Section 4. Example: Eurodita Twin Skin one-bed log cabin 6×5.5m.
58 mm — Upgraded standard (11 products)
The incremental upgrade from 44 mm. Stiffer walls, better wind and thermal behaviour, noticeable visual presence. Used for larger offices, two-room summer houses, rental pods for longer occupancy, workshop cabins. Example: Log Cabin Matthew 7x4m.
70 mm — Heavier residential and two-storey (11 products)
The minimum thickness we recommend for two-storey single-skin log cabins because of vertical and snow-load capacity. Also specified for compact residential cabins in cool but non-Nordic climates. Example: Two-Storey Log Cabin Roan.
88 mm — Mobile homes, BS 3632-compliant (32 products)
Our dominant mobile-home thickness. Provides the structural depth and fixing surface required by BS 3632 residential mobile home assemblies when combined with the correct roof, floor and glazing specifications. Also used for static holiday homes under BS EN 1647. Core band for dealers selling to UK holiday parks or park-home operators. Example: Mobile Log Home 1 Bed 8x5m.
135–180 mm glulam — Engineered residential (27 products)
Laminated structural timber built to the EN 14080 framework. Dimensional stability is dramatically better than solid spruce: glulam does not shrink, twist or settle. Full residential territory — houses designed for 50+ year service life. See the glulam category pages.
220 mm glulam — Premium Nordic residential (10 products)
The heaviest profile we routinely build. Scandinavian-climate residential houses, premium lake homes, projects demanding the thickest commercially available engineered-timber wall. Highest price point and longest lead time. Example: Glulam Log House Finland 220mm 23.6×8.4m.
Smaller niche bands (19 mm sheds — 12 products; 35 mm — 3 products; 90 mm — 3 products) complete the 13-category catalog. No MOQ; 2–4 week lead times on standard models. See our private-label log cabin reseller guide for dealer onboarding essentials.
Wall Thickness Comparison Table
The table below summarises each band alongside the dominant use case, Eurodita product count, recommended climate range, and the regulatory framework most often relevant in the UK and EU. Use it as the first page of your dealer-facing sales sheet.
| Thickness | Primary Use Case | Eurodita Products | Climate Suitability | Regulatory Framework |
|---|---|---|---|---|
| 19 mm | Sheds, budget garden storage | 12 | Mild / seasonal | UK Permitted Development outbuilding |
| 28 mm | Summer cabins, seasonal pods, playhouses | 31 | Mild to temperate / seasonal | UK Permitted Development outbuilding |
| 44 mm | Garden offices, hobby rooms, holiday cabins | 85 | Temperate / 3-season + mild year-round | UK Permitted Development outbuilding |
| 44-50-44 Twin Skin | Year-round habitable garden annexes & offices | 13 | Temperate to cool / year-round | UK Permitted Development (outbuilding) or Building Regs (annex) |
| 58 mm | Upgraded offices, rental pods, workshops | 11 | Temperate / extended-season | UK Permitted Development or Building Regs depending on use |
| 70 mm | Two-storey cabins, compact residential | 11 | Temperate to cool | Building Regulations (when habitable) |
| 88 mm | UK mobile homes & static holiday homes | 32 | Temperate to cool / year-round | BS 3632:2015 (residential) or BS EN 1647:2018 (holiday) |
| 135–220 mm glulam | Residential houses, Nordic & premium residential | 37 | Cool to cold / year-round | EN 14080 structural glulam; national Building Regs |
A note on the regulatory column: wall thickness alone does not grant compliance. BS 3632, BS EN 1647 and Building Regulations all specify whole-assembly performance — insulation, fire, ventilation, structural calculations. The thickness column indicates which band is typically specified for projects operating under each framework.
Twin Skin (44-50-44 mm): The Insulated Advantage
Twin Skin is the construction Eurodita’s competitors rarely carry and the single clearest differentiator in our wall-thickness range. It’s worth understanding in detail because it reframes the “how thick?” conversation with your customer.
What 44-50-44 actually means
Twin Skin walls are assembled from two machined 44 mm spruce skins, erected as parallel walls with a continuous 50 mm cavity between them. The cavity is filled with mineral-wool insulation during assembly. Total wall depth: 138 mm. Internal and external surfaces are both tongue-and-groove solid timber, so the cabin looks and feels like a traditional log building on both sides — unlike a conventional timber-framed house where the inner face is plasterboard.
Why Eurodita offers it (and why it matters for dealers)
A 138 mm single-skin log would be heavier, more expensive to ship, and harder to machine to tight tolerances at scale. More importantly, solid timber is a mediocre insulator at any thickness — timber’s thermal conductivity is fixed. By splitting the wall into two skins and putting a dedicated insulation layer in between, Twin Skin delivers significantly improved thermal performance relative to single-skin walls of comparable depth, without moving the customer up to a glulam residential price bracket.
For a dealer, this is the answer to three recurring customer conversations:
- “I want a garden office I can use in January.” — Twin Skin, not 44 mm.
- “I want a granny annex but not a full brick extension.” — Twin Skin with the right Building Regulations package.
- “I want year-round occupancy but I can’t afford a glulam house.” — Twin Skin at roughly the middle of the price range.
What dealers can tell customers
Present Twin Skin as a “significantly improved thermal performance versus single-skin equivalents, suitable for year-round heated occupancy in temperate and cool climates.” We deliberately do not publish a single U-value for Twin Skin because real-world performance depends on roof specification, floor construction, glazing package, air-tightness and site orientation. When a customer or planning officer requires a thermal calculation for Building Regulations Part L, your Eurodita account manager can supply per-project whole-assembly calculations.
Example Twin Skin product: the Eurodita Twin Skin one-bed log cabin 6×5.5m — a typical annex-scale footprint many UK and Irish dealers carry as their flagship year-round model.
How to Match Wall Thickness to Your Customer’s Use Case
A dealer’s job in the first discovery call is usually to narrow 13 thickness bands down to 2 candidates. Use the mapping below.
Garden storage, sheds, playhouses → 19–28 mm
Customer brief: “somewhere to put the lawnmower / bikes / kids’ toys.” They are not asking about insulation, heating or year-round use. Recommend 19 mm for the lightest budget, 28 mm if they want a second-function summer space. Lead time 2–4 weeks. No regulatory complication in most UK/EU gardens under Permitted Development.
Garden office, weekend cabin, mild climate → 44 mm
Customer brief: “home office, maybe a guest room for a long weekend, used most months of the year.” 44 mm is the volume choice. For UK and Irish gardens, pair with roof insulation, an insulated floor deck and a good-quality entrance door. If they will heat it through winter daily, push them to 58 mm or Twin Skin.
Year-round habitable office or annex, cool climate → 58–70 mm or Twin Skin
Customer brief: “I will use this every day all year. I want heating. Possibly a shower room.” Twin Skin is the correct default. 58–70 mm single-skin also works when the customer specifically wants the interior log-wall aesthetic on both sides and accepts supplementary insulation.
UK mobile home (residential or holiday) → 88 mm
Customer brief: “I’m selling to holiday parks / I’m a park home operator.” 88 mm is the band that pairs with BS 3632 and BS EN 1647 assemblies. Mobile-home projects also carry specific fire, structural and thermal requirements beyond wall thickness — see our mobile home dealership 2026 startup guide for the full regulatory picture.
Full residential, Nordic or cold-climate → 135–220 mm glulam
Customer brief: “a proper house, built to last, heated all winter, in Sweden / Finland / Scotland / the Alps.” Glulam is the right material family because of dimensional stability, structural span capacity and thermal mass. Budget, planning timeline and foundation works step up accordingly.
Dealer onboarding mapping
If you are onboarding with Eurodita and are unsure which thickness bands to stock first, see our how to start a log cabin dealership (UK) guide. A typical UK garden-range starter catalog is: one 28 mm summer cabin, two 44 mm offices, one Twin Skin year-round model. That covers roughly 70% of first-year enquiries.
Wall Thickness vs Regulations: What Dealers Need to Know
Thickness doesn’t create compliance on its own, but it is the simplest proxy for the regulatory tier a product sits in. Four frameworks matter for Eurodita dealers.
BS 3632:2015 — UK residential mobile homes
The UK standard for year-round permanent residential park homes. Specifies whole-building thermal, fire, ventilation and structural performance, with a 60-year design lifespan. Eurodita’s 88 mm mobile-home range is engineered to pair with BS 3632 assemblies when combined with the specified roof, floor, glazing and services package. Mortgage-eligibility for end customers depends on BS 3632 certification of the finished home.
BS EN 1647:2018 — UK/EU holiday (leisure) homes
The standard for seasonal holiday homes on licensed sites. Lighter than BS 3632 on thermal performance but shares most fire and structural provisions. Our 88 mm range is specified for both BS 3632 and BS EN 1647 projects.
EN 14080 — Structural glulam
The European harmonised standard for load-bearing glulam timber. All Eurodita glulam wall thicknesses (135, 180, 220 mm) are manufactured under the EN 14080 framework. When a national Building Regulations reviewer asks for structural justification on a glulam residential project, EN 14080 is the citation.
UK Permitted Development — outbuildings
Not a thickness standard, but highly relevant. Permitted Development in England allows outbuildings up to certain height and footprint limits without planning consent, provided the building is “incidental to the enjoyment of the dwellinghouse.” Thicker walls consume more internal floor area — worth flagging when a customer is maximising a small plot. Any cabin used as self-contained sleeping accommodation falls outside Permitted Development and enters full Building Regulations.
EUDR (2026) — timber sourcing
The EU Deforestation Regulation applies from 2026 and requires traceable, deforestation-free timber for products placed on the EU market. Eurodita is FSC certified and our spruce supply chain is traceable through the FSC chain-of-custody system. CE marking is maintained on structural components where applicable. For dealers reselling into the EU, this substantially simplifies your own due-diligence paperwork.
The regulatory framework that matters most in any given project is defined by use, not wall thickness. Always confirm the end use with your customer before quoting.
Frequently Asked Questions
What’s the minimum wall thickness for year-round living?
There is no single legal minimum — requirements come from the applicable regulation (BS 3632, national Building Regulations) and depend on whole-assembly performance. As a practical dealer rule: avoid single-skin walls below 58 mm for year-round heated occupancy in temperate and cool climates. Twin Skin (44-50-44) or 88 mm mobile-home assemblies are the conservative recommendations. For full residential in cold climates, specify 135 mm+ glulam.
Is Twin Skin better than a thick single-skin log cabin?
For thermal performance at a comparable total wall depth, yes. A 44-50-44 Twin Skin wall has a dedicated 50 mm insulation layer, whereas a single 88 mm solid-log wall relies on timber alone. For traditional solid-log aesthetics on both sides, some customers still prefer thick single-skin — both constructions are legitimate, which is why Eurodita ships both.
Can 44 mm be used for a garden office with heating?
Yes, in temperate climates and for typical daily office use. The cabin should be specified with roof insulation, an insulated floor deck and a good-quality entrance door and glazing package. For daily heated use through cold winters, move the customer to 58 mm, 70 mm or Twin Skin to protect running costs and comfort.
What thickness do I need for a mobile home in the UK?
88 mm is our standard mobile-home wall thickness and pairs with BS 3632 (residential) and BS EN 1647 (holiday) assemblies. BS 3632 is required for any mobile home intended as a permanent residence or where the end customer wants mortgage eligibility.
Does Eurodita offer custom wall thicknesses?
Our 13 catalog thickness values cover the full commercial range from 19 mm sheds to 220 mm glulam premium residential. Because all kits are private-label manufactured to order, custom layout and specification changes are accommodated within our standard thickness bands. For non-standard profile depths outside the 13 catalog values, contact our partner team for a project-specific feasibility review.
What’s the MOQ for 44 mm wall cabins?
Eurodita applies no minimum order quantity. Dealers can order a single 44 mm cabin — or a container mix of different thicknesses — on standard dealer terms. This is particularly useful when you are onboarding and want to trial multiple bands (for example, one 28 mm, two 44 mm, one Twin Skin) before committing to a core stock list.
How does wall thickness affect lead time?
Standard catalog models (across all thickness bands) ship on our normal 2–4 week lead time. Glulam products at 135–220 mm may run slightly longer when specification is non-standard because of the laminated-beam production schedule. Confirm lead time at the quote stage for each project.
Which wall thickness is most popular for UK dealers?
44 mm dominates by SKU count (85 products) and by volume across our UK dealer network — it is the default garden-range specification. 88 mm is the second major category for dealers selling to holiday parks and park-home operators. Twin Skin is the fastest-growing category for dealers positioning toward year-round habitable cabins and granny annexes.
Are thicker walls always better?
No. Thicker walls mean higher kit cost, higher shipping weight, smaller internal footprint for a given external footprint, and longer installation. For a summer-use holiday cabin, 28 mm is the right answer; specifying 70 mm would simply increase cost without delivering any benefit the customer will notice. Thickness should match use case, climate and regulation — not exceed them.
Ready to discuss which wall thickness fits your dealer range?
Eurodita manufactures 12,000+ private-label log cabin kits annually across 13 wall-thickness categories, with no MOQ and 2–4 week lead times on standard models. FSC and CE certified, supplying 200+ dealers across 38 countries.
Contact our partner team to start the conversation — no commitment required for an initial enquiry.
