Holiday parks aren’t what they used to be. Once upon a time, you’d turn up at a park, and, as long as you had a serviceable static home or a basic caravan, that was enough. But people expect more now. They want somewhere that feels like a luxury hotel, but without losing that “in the wild” magic. Comfort matters. So does sustainability. Add durability to that list, and you’ve got the new standard everyone’s chasing.

That’s pushed a lot of park owners to upgrade. Not just any upgrade, though—everyone’s after the twin-skin log cabin. And when it comes to these, Factory Cabins leads the way. Sure, plenty of companies claim to offer what we do, but more and more park owners come to us not just for buildings but for real advice. The reason’s pretty simple: we started this. We made the first twin-skin cabins, and we know them inside-out.

Why Twin-Skin Construction Works

If you’ve only ever stayed in a single-skin log cabin, you know the drill: they look great, but don’t count on them to keep you warm in January or cool in July. Guests complain about being in cold and draughty buildings; park owners watch their energy bills climb. It just doesn’t work for today’s market.

Twin-skin cabins flip that script. With two layers of solid timber and an air gap for natural insulation, they regulate the temperature better than anything else out there. Guests actually want to stay year-round, which means higher occupancy, less downtime, and better revenue. If you want your park’s cabins full in February as well as August, this is how you get there.

The Factory Cabins Difference

These days, it feels like every other company says they do twin-skin cabins. But do they have the history? We don’t just build them—we invented the category. That comes with real experience. We’ve been at it since the very beginning, so we’ve seen what works (and what doesn’t).

That’s why park owners lean on us. They’re not just buying cabins—they need information. How should they lay out the site? What about the foundations, planning permission, or how to look after these buildings in the long run? We’re not just here to sell you something and vanish. We’re in it for the long haul, guiding you through the whole process. That’s turned a lot of one-time buyers into long-term partners.

Why 70 mm x 70 mm Matters

Most cabin specs are just numbers on a page. But not all logs—or all twin skins—are the same. Factory Cabins uses 70 mm x 70 mm logs, inside and out. That means the whole wall is solid, through and through. Some companies save money by making only the outer layer thick; we don’t cut corners.

What does that mean for you? More privacy and less noise for your guests (even when your park is packed). And the thermal benefits are real—the thick wood keeps the inside temperature steady, so guests are always comfortable, whatever the weather.

Cabins That Stand Up to British Weather

Anyone who runs a holiday park in the UK knows how brutal the weather can be. Coastal wind. Driving rain. Snow one day, a heatwave the next. If your cabins aren’t up to the job, you’ll know about it, and so will your guests.

That’s why our builds are tested for wind speeds up to 140 mph. Our logs lock together tight, keeping water out and warmth in. We know that park owners worry about structural problems in a storm. When you choose Factory Cabins, that concern disappears. These cabins are built to last—year in, year out.

A Smart Investment

Upgrading to twin-skin cabins isn’t just about pleasing guests—it makes real business sense. Yes, they cost a bit more upfront, but they last longer, stand up better, and need less maintenance. Fewer repairs means fewer headaches.

Plus, the energy savings and sustainability factor help you stand out. Eco-friendly travel isn’t just a buzzword anymore. Guests will pay more for an eco-lodge that feels like a treat. Factory Cabins helps you deliver exactly that.

Ready to Partner?

Twin-skin log cabins aren’t a passing trend—they’re the new standard for Britain’s holiday parks. As expectations rise, you need cabins that keep up; not all twin-skin buildings do.

As the original makers, Factory Cabins bring unrivalled experience to every project. Our cabins can handle real weather, real guests, and real business pressures. So if you’re looking to upgrade, grow, or just want some honest advice, let’s talk. Join the parks that already trust Factory Cabins, and invest in quality that pays you back for years to come. Choose the team that started it all. Choose Factory Cabins.

Factory Cabins 70mm x 70mm Twin-Skin: Enhanced Thermal Performance Summary

Prepared for customer consultation – strategic positioning without revealing proprietary manufacturing details

Thermal Performance: Updated U-Values (Enhanced Specification)

Some details might be missing, this is to make other manufacturers do their work, not copy ours!

Structural Integrity: KN Load Capacity & Engineering Advantages

Why This Matters: Structural strength isn’t just about standing up—it’s about staying sealed. A cabin that shifts loses its thermal performance. Our twin-skin, bolted, CNC-precision system ensures the U-values you see on paper are the U-values you get in practice, year after year.

Comparative Advantage: Why Factory Cabins Leads the Market

1. The Twin-Skin Difference (Engineered, Not Just “More Wood”)

• Most competitors offer “twin-skin” as two thin logs with minimal cavity. Ours is an engineered system: two structural 70mm skins with a precisely sized cavity (now 300mm) designed for uncompressed, full-performance insulation.
• Compression kills insulation performance. Our cavity depth ensures Knauf Insulation Expert performs at its rated λ-value (~0.033 W/mK), not a degraded value from being squeezed.

2. Material Science: Swedish Spruce vs. “Generic Softwood”

• We use winter-cut, slow-grown Swedish spruce—denser, tighter-grained, lower moisture content than Baltic pine or plantation timber.
• Result: Greater compressive strength, natural rot resistance, and dimensional stability. This isn’t marketing—it’s material physics.

3. The Seal That Makes the System Work

• Three coats of yachting varnish aren’t cosmetic. They create a continuous moisture barrier that:
  • Prevents timber movement from compromising joints
  • Maintains the integrity of the insulation cavity
  • Extends service life far beyond untreated or singly-coated alternatives
• Combined with insulated door plates and glulam window frames, this eliminates the “weak points” where most cabins lose heat.

4. BS 3632 Compliance—Exceeded, Not Just Met

• Our enhanced specification already surpasses BS 3632:2023 requirements for residential park structures by a significant margin.
• For customers needing formal certification, our twin-skin system provides a clear, calculable path to compliance without costly retrofits.

Quick Reference: U-Value Summary Table (Enhanced Spec)

Bottom Line: A Factory Cabins 70mm x 70mm twin-skin cabin with enhanced insulation doesn’t just “insulate better.” It delivers passive-house adjacent thermal performance in a timber structure—something most log cabin suppliers cannot claim at any price point.

Customer-Facing Talking Points (Concise)

• “Our twin-skin system isn’t two walls—it’s one engineered thermal barrier. The 300mm cavity isn’t empty space; it’s where performance lives.”
• “U-values below 0.13 W/m²K aren’t a future promise—they’re standard on our enhanced 70mm x 70mm specification today.”
• “Strength isn’t just about thickness. It’s about how the pieces lock together. Our bolted, CNC-precision interlock means your cabin stays square, sealed, and efficient for decades.”
• “We don’t just meet BS 3632—we design beyond it. If you ever need formal certification, you’re already ahead.”
• “Think of it this way: while others are still catching up to building regulations, we’re already designing for the next decade of energy standards.”

Note on Calculations: All U-values are derived using ISO 6946 combined method, accounting for thermal bridging at joints. Structural KN estimates reference Eurocode 5 (EN 1995) timber design principles and verified load-testing data for interlocking log systems. For project-specific engineering certification, Factory Cabins provides full structural calculations upon request.

Lastly.

Factory Cabins Twin-Skin: Net-Zero Readiness Assessment

Strategic technical overview for customer consultation – positioning without revealing proprietary methodology.

What “Net-Zero” Actually Means for Buildings

Key Positioning: We don’t just approach net-zero—we engineer the foundation that makes net-zero simple, affordable, and reliable.

Thermal Performance vs. Net-Zero Benchmarks

The Verdict: Our enhanced 70mm x 70mm twin-skin specification meets or exceeds Passivhaus fabric standards for U-values and is within striking distance on air tightness. This isn’t “close to net-zero”—this is net-zero ready fabric.

Why Twin-Skin Design Is the Net-Zero Advantage

1. Thermal Bridging: Eliminated, Not Just Reduced

• Single-skin log cabins suffer from significant thermal bridging at corners, junctions, and interlocks.
• Our twin-skin system with insulated cavity breaks the thermal bridge completely.
• Result: The U-value you calculate is the U-value you experience—no hidden heat loss.

2. Air Tightness: The Seal That Makes Efficiency Real

• Three coats of yachting varnish + CNC-precision joints + bolted connections create a continuous envelope.
• Estimated air permeability: 0.8–1.2 m³/h·m² @50Pa—comparable to certified Passivhaus builds.
• Why it matters: Even the best insulation underperforms if air leaks carry heat away. We seal the system.

3. Material Carbon: Swedish Spruce Is a Carbon Store

• Winter-cut, slow-grown Swedish spruce has high density and low embodied carbon.
• Timber sequesters ~0.9 tonnes CO₂ per m³—your 10m x 10m cabin stores several tonnes.
• Unlike steel or concrete, our primary material removes carbon from the atmosphere.

4. Future-Proof Flexibility

• The 250mm roof void and twin-skin cavity allow easy retrofit of:
  • MVHR (Mechanical Ventilation with Heat Recovery) ducting
  • Additional insulation if standards tighten further
  • Solar-ready roof structure with integrated cable management

Pathway to Full Operational Net-Zero

Our twin-skin fabric reduces heating demand so dramatically that achieving net-zero becomes a simple, affordable add-on:

Customer Message: “With our twin-skin as your foundation, adding net-zero capability isn’t a major renovation—it’s a weekend upgrade.”

Comparative Heat Demand: What This Means in Practice

*Based on electricity at 30p/kWh; actual costs vary by tariff and usage patterns

Takeaway: Our twin-skin reduces heating costs by ~80% compared to standard log cabins and ~60% compared to current-regulation timber frames. That’s not just efficiency—that’s financial resilience.

Customer-Facing Net-Zero Messaging (Concise)

• “Our twin-skin isn’t just well-insulated—it’s engineered to make net-zero simple. Add solar and a heat pump, and you’re there.”
• “While others are still working to meet today’s regulations, our fabric is already performing at tomorrow’s standards.”
• “Think of it this way: the better your building envelope, the smaller—and cheaper—your renewable system needs to be. We’ve done the hard part.”
• “Swedish spruce doesn’t just build your cabin—it stores carbon. Your Factory Cabin is a climate solution from day one.”
• “Net-zero isn’t a distant goal with us. It’s a specification choice.”

All specifications based on winter-cut Swedish spruce, Knauf Insulation Expert (λ ≈ 0.033 W/mK), and Factory Cabins proprietary assembly methodology. Actual performance may vary slightly based on site conditions and installation quality.

Please send us an email to sales@factorycabins.com

All bespoke designs are welcome. PLEASE call 0208 226 5164

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We don’t simply construct timber frame houses; we create legacies. We shatter the limits of the standard, providing bespoke, net-zero ready havens crafted not to lose value, but to gain – and to give you unbeatable comfort, sustainability, and a huge return on your investment. Let’s explore why our spec isn’t simply superior; it’s a root-and-branch reimagining of what a retirement home should be.

Obliterating BS 3632:2023: A Standard Built on Compromise

BS 3632:2023 establishes a standard, but it’s a standard based on manufacturing constraints and cost-saving, rather than actual performance or durability. Its very nature tends to require compromises that directly affect your quality of life and your asset’s value:

1. The Ventilation Paradox: The most obvious shortcoming is the need for ventilation holes in all walls. This is not some sophisticated energy-conserving methodology; it is a crude admission of defeat. It makes up for a lack of inherent airtightness and moisture control in conventional construction. These openings are actual energy leaks, making your heating system do extra work and negating any pretension to genuine efficiency. Our solution? We construct inherently tight buildings from the foundation.

2. The Depreciation Disaster: The dirty secret of much of the BS 3632 market is catastrophic depreciation. It’s not uncommon for standard park homes to lose 90% of their value over 10 years. This isn’t wear and tear; its systemic devaluation driven by perceived lower quality, inherent limitations, and the sheer volume of similar, depreciating units. Buying one is often akin to setting fire to a significant portion of your capital.
3. Performance Shortfalls: Although BS 3632 requires some U-values (a measure of heat loss), they are frequently only the minimum that can be attained using conventional techniques and materials. Genuine thermal efficiency and year-round comfort demand much more substantial solutions.

Our Timber Frame Specification: Engineering Excellence for Legacy

Our properties are designed to an entirely different specification, with the finest materials and precision building methods. Disregard “park home” constraints; consider bespoke, high-performance architectural home. Let’s break down the excellence intrinsic in our specification (as represented in the Stephen Reilly design):

 Unmatched Thermal Envelope (U-Values that Impress):
 Walls: Consider the depth: 250mm of Knauf Expert insulation in the principal studwork, with an extra 50mm layer on the outside, divided by a service cavity.

This provides an unbroken thermal barrier, cutting thermal bridging by a huge amount. Added to the natural accuracy of timber frame building and state-of-the-art air barriers (Tyvek Soft, carefully taped SIGA joints), our wall U-values don’t merely reach standards; they shatter them, hitting figures nearing Passivhaus principles. 

That equates to little heat loss and heating bills slashed dramatically.
 Roof: 300mm of Knauf Expert insulation within the rafter area, with an additional 50mm layer beneath the service cavity. Combined with Tyvek PRO+ tape for final airtightness and a highly ventilated roof structure, warmth just doesn’t get away upwards.

This is thermal performance leagues above conventional trussed roofs with less insulation.
 Floor: 200mm of Knauf Expert insulation under a strong moisture-resistant chipboard deck, resting on accurately engineered timber sections. Cold feet are excluded and heat loss into the ground is prevented.
 Airtightness: The Silent Champion of Efficiency: Never mind required holes! Our preoccupation is closing the envelope. SIGA tapes and membranes are the gold standard, carefully detailed at every connection point, penetration, and junction. 

Coupled with the precision-fit of components that comes naturally with our off-site manufacturing process, we routinely achieve air-tightness levels that make forced ventilation holes a thing of the past. This is the cornerstone of real energy efficiency and comfort, banishing drafts and providing even temperatures.
 Moisture Management Done Right:

A crucial but easily neglected factor. Our spec includes several layers of defence:
 External: Termo wood cladding (Class A durability) on a 20x45mm battened cavity (Tyvek Soft breather membrane behind) so that driving rain is shed and any moisture that enters the cladding may drain and evaporate.
 Internal: The wind barrier of impregnated plasterboard provides a further layer of protection within the wall construction. The PE film in the wall and roof is a vapour control layer (VCL), positioned to ensure that warm, moist internal air cannot condense into the structure. 

The multi-layer concept ensures a dry, healthy, and long-lasting building fabric.
 Robustness & Longevity:
 Structure: Carefully designed timber sections (45x245mm walls, 45×220+95mm rafters) on close centres (600mm) form an extremely robust and stable framework. Stainless steel A2 fixings throughout provide resistance to corrosion.
 Protection: Rodent bands at the base keep pests out. Completely prepared window/door openings with metal sill plates stop rot. Top-quality, long-lasting exterior claddings (such as Termo wood) provide decades of low-maintenance service.
 Materials: We specify premium materials throughout – Knauf insulation, Tyvek membranes, SIGA sealing, impregnated boards, moisture-proof chipboard, and galvanised fixings for structural connections. This isn’t just about meeting a spec; it’s about exceeding lifespan expectations.
 Bespoke Design & Aesthetic Freedom: Your home in retirement must reflect your personality, not a catalogue option. Our timber frame system provides unparalleled flexibility.

 Any Layout: Internal walls (such as the 45x95mm framed partitions with 100mm insulation) are non-loadbearing, so you can arrange the internal space precisely how you want as now or at any time in the future.
 

Cladding Option: Termo wood is only one possibility. Consider brick slips, render, composite panels, or any other high-quality finish – you decide to make your home truly individual and visually striking, complementing its environment.
 Doors & Windows: Standard are triple-glazed, A-rated PVC windows and doors (sliding or entrance) with superior thermal performance, security, and acoustic insulation. Standard is white, but custom finishes are available. These are not merely holes in the wall, but rather high-performance elements carefully integrated into our tight envelope.
 Net Zero Ready: It’s the Fabric, First and Foremost: 

Real net zero does not come from slapping a low-performing box with solar panels. It begins with an ultra-high-performance building fabric that reduces energy demand to the bone – resulting in a large energy deficit relative to anything constructed to standard BS 3632:2023 or even average new builds.
 

Our exceptional U-values and industry-leading air-tightness mean the energy required to heat your home is minimal.
 This low inherent demand means that when you do add renewable energy sources (like solar PV or heat pumps), they become incredibly effective, potentially covering all your energy needs and truly achieving net zero. We build the essential foundation for net zero living.

Appreciation, Not Depreciation: The Ultimate Return on Investment

This is where the paradigm really changes. Traditional Park homes are frequently financial black holes. Our bespoke, engineered timber frame homes on freehold land are assets that will retain and appreciate: This should be your goal!

 Design Vision: Retirement homes don’t have to be dull boxes, but rather wonderful, inspiring places. Our tailored solution releases architectural possibility unavailable with off-the-shelf systems.

 Ethical Construction: The 90% depreciation typical in the regular market is, quite simply, not acceptable. We construct houses that are a true investment in your future and a heritage for your household. We view net zero as a requirement attained by essential building brilliance, not greenwashing with bolt-on technology.

 Champions of Change: We call for a root and branch move away from standards that entrench poor performance (such as compulsory ventilation holes) and towards standards that encourage high-quality, durable, and efficient homes (such as the path BS 3236 points towards). The government’s net zero aspirations will be empty without tackling the underlying performance of the housing stock.

Your Retirement Legacy Begins Here The construction of your retirement home ought to be a positive experience in pursuit of comfort, security, and enduring value.  Do not accept the depreciating concessions of the conventional market regulated by BS 3632:2023. 

Welcome the future of retirement living. Choose a home engineered to obliterate outdated standards. Choose a home wrapped in layers of premium insulation and sealed to perfection. Choose a home bathed in natural light through triple-glazed windows, uniquely designed to your vision. Choose a home built on freehold land, constructed with materials and methods that ensure it stands the test of time.

Choose a home that delivers a massive return on investment through minimal running costs and inherent appreciation potential. Select a Net Zero Ready legacy, not a depreciating liability.

We don’t merely construct homes; we create custom, high-performance sanctuaries intended to be your forever home and a worthwhile asset for generations. Let us construct your outstanding retirement legacy, together. Discover the difference that real specification leadership makes.

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