What Isokern | prefab bouwsystemen does

Isokern b.v., operating as Isokern | prefab bouwsystemen, is a Dutch manufacturer of prefabricated wooden building elements headquartered in Barneveld, Netherlands. Founded in 2015 by Jonathan van de Pol and his father, the company operates an automated CNC factory producing wall, floor, roof, and frame components under two primary building systems: SIPS (Structural Insulated Panel System), which combines structural panels with an Airpop insulation core, and HSB (Houtskeletbouw), a timber-frame method with insulation between wooden studs. Production is 100% in-house, including proprietary SIPS gluing and CNC processing to millimeter tolerances, and the firm delivers BIM/IFC, DWG, and PDF design packages to support project execution and Wkb (Wet Kwaliteitsborging) compliance. The portfolio extends beyond structural shells to dormers, extensions, storage buildings, gutter supports, adjustment frames, and custom timber constructions.

The business sells project-based, custom-manufactured prefab elements and complementary installation services through direct sales with personal consultation, in-house mounting teams, and a network of certified builders and processors spanning Central Netherlands and nationwide. Target segments are Dutch contractors (aannemers), architects, and private individuals (particulieren), with customers ranging from single-family homeowners (e.g., Family Roordink in Putten) to multi-unit vacation park developers (Geresteijn/Vakantiepark Berkenrode, 26 units). Pricing is quote-based with no public list rates, and contract cadence tends toward multi-year project commitments. The company holds FSC-C092624 certification, Erkend Leerbedrijf status with SBB, and GDPR compliance, and currently operates at approximately one home-equivalent per week (~52/year) with a publicly stated long-term target of 150 homes per year. Isokern employs 18-19 people, is family-controlled with no disclosed institutional investors or subsidiaries, and in 2026 exhibited at Build Show LIVE in San Antonio, signaling initial internationalization intent beyond its Netherlands-only operating footprint.

Name

Isokern | prefab bouwsystemen

Legal name

Isokern b.v.

Website

https://isokern.nl

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

Isokern is a Dutch manufacturer of prefabricated wooden building elements using SIPS and HSB construction methods, serving residential contractors, architects, and private individuals across the Netherlands via custom, project-based production from its automated CNC factory in Barneveld.

Ownership category

akta.pro rank

Headquarters

HQ city

Barneveld

HQ country

Netherlands

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D

Revenue model

1. Prefab Building Elements Sales: Sale of prefabricated wooden building elements including walls, floors, roofs, frames, and complete prefab casings. Products are custom-manufactured to order for each project.
2. Installation and Assembly Services: Complete installation and assembly services provided through their own mounting teams and certified installation partners, offering end-to-end delivery from factory to site.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

Isokern designs, produces, and assembles prefabricated wooden building elements (walls, floors, roofs, frames, storage buildings, dormers, extensions, and timber structures) for residential construction using SIPS and HSB construction methods. Products are manufactured to millimeter accuracy in an automated CNC factory in Barneveld and delivered just-in-time with optional installation by the company's own mounting teams or certified partners. Complete end-to-end project management from design consultation and BIM engineering through factory production to on-site assembly is provided.

Product overview

Isokern is a Dutch manufacturer of prefabricated wooden construction elements based in Barneveld, operating since 2015. The company produces two primary building systems: SIPS (Structural Insulated Panel System) and HSB (Houtskeletbouw/Timber Frame Construction). Their product portfolio includes prefabricated walls, floors, roofs, window frames, storage buildings, and various structural components—all manufactured to millimeter precision using computer-controlled CNC machines in their automated factory. The SIPS product line features panels with Airpop insulation cores and OSB/3 sheathing, suitable for walls, dormers (dakkapel), and extensions (uitbouw). The HSB product line includes timber frames, roof trusses, floor systems (including Finnjoist beams and service floors), storage buildings, timber constructions, gutter supports, and adjustment frames. All products support 100% customization and are designed to reduce construction failures and building time. The company delivers 3D BIM models (IFC format) along with 2D drawings (DWG and PDF) for project collaboration.

Differentiator

Problem solved

Functional benefit

Products and services

• SIPS (Structural Insulated Panel System) Structural Insulated Panel System combining inner and outer panels with an insulating Airpop core, producing high-strength load-bearing and non-load-bearing wall and roof elements. Panels range from 120mm to 265mm thickness with Rd-values from 2.8 to 6.5 K/Wm², 100% Dutch-manufactured and CNC-processed for millimeter precision.
• HSB (Houtskeletbouw / Timber Frame Construction) Timber frame construction system using wooden frames with insulation between them, offering various construction and insulation values for walls, floors, roofs, and prefab elements. CO2-retaining sustainable building method.
• Prefab Walls (Prefab Wanden) Prefabricated wooden wall elements produced in Isokern's automated factory using computer-controlled machines, available in SIPS and HSB variants with customizable insulation values for residential construction.
• Prefab Floors (Prefab Vloeren) Prefabricated wooden floor elements including solid timber beams, Finnjoist beams, and innovative leidingvloeren (service duct floors) integrating electrical, water, heating, and air ducting for simplified on-site installation.
• Prefab Roofs (Prefab Daken) Prefabricated roof structures including HSB roof trusses and caps for large spans, sporen caps from gutter to ridge, and gording caps. Available with various finishing options including tiles, sedum, EPDM, or thatch.
• Prefab Frames (Kozijnen / Stelkozijnen) Prefabricated window and door frames, including adjustment frames (stelkozijnen) pre-painted in factory, enabling precise millimeter-accurate installation upon window delivery.
• Storage Buildings (Bergingen) Fully customized prefabricated storage buildings produced in factory and installed within one day. Durable, low-maintenance, designed to last for years.
• SIPS Roof Extensions (SIPS Dakkapel) Prefabricated dormer roofs using SIPS panels with high insulation value and slim construction. CNC-milled to exact dimensions and can be delivered fully finished as one wind- and watertight unit.
• SIPS Extensions (SIPS Uitbouw) Prefabricated home extensions using SIPS panels for optimal insulation with minimal timber content. 170mm panel with Rd 4.5 K/Wm² insulation value; lightweight panels (600mm–2980mm wide) can be hand-placed without heavy cranes.
• Timber Structures (Houtconstructies) Custom wooden constructions in Douglas, oak, or laminated spruce for decorative or structural purposes, including prefabricated gutter supports (gootrekken). Computer-controlled precision manufacturing enables exact sizing with minimal failure costs.

Quantifiable outcome

• One home delivered per week from factory
• +3 more outcomes

Named customers8 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature3 records

Partnerships

Nine partnerships are on record, tiered minor and core.

• Build Show LIVEminorGTM or Marketing Partner · 10 September 2026Isokern participates as an exhibitor at the Build Show LIVE trade event in San Antonio, Texas, alongside other manufacturers including Huber Engineered Woods, Pella Windows & Doors, Polyguard, PROSOCO, Bosch Home Comfort, and HighSpire. The event expects over 3,000 construction professionals with 50+ education sessions.
• Snitselaar BouwcoreChannel Partner/ Reseller/ DistributorCertified builder and processor serving Central Netherlands (Midden-Nederland). Handles home construction projects using Isokern products. Located at Postweg 187, 6741 MJ Lunteren.
• Bouwbedrijf SteenbergencoreChannel Partner/ Reseller/ DistributorCertified builder serving all of the Netherlands. Handles construction projects using Isokern prefab elements. Located at Velkemeensedijk 3, 6732 GE Harskamp.
• Goed verblijvencoreChannel Partner/ Reseller/ DistributorProcessor specializing in garden offices, recreation and care homes. Serves all of the Netherlands. Located at Uddelerweg 17, 8075 CG Elspeet.
• Randewijk Beter WonenminorChannel Partner/ Reseller/ DistributorBuilder serving Central Netherlands (Midden-Nederland). Located at Stationsstraat 81a, 3905 JH Veenendaal.
• Bouwbedrijf van NoordcoreChannel Partner/ Reseller/ DistributorBuilder based in Barneveld, serving the construction market using Isokern prefab products. Located at Van wijnberglaan 65, 3771 JJ Barneveld.
• Hepa prefab montageminorImplementation/ SI/ Consulting PartnerCertified mounting partner serving the Netherlands. Specializes in prefab assembly. Located at De Vlasman 5, 6669 ND Dodewaard.
• MAF (Missionary Aviation Fellowship)minorOthersIsokern supports MAF, a non-profit aviation organization operating in 30 countries, providing air transport and communications for humanitarian aid and Christian missionary work in remote areas.
• GeresteijncoreChannel Partner/ Reseller/ DistributorConstruction company from Kootwijkerbroek that partnered with Isokern for the Wekerom project, building 26 vacation homes at Vakantiepark Berkenrode in 2023-2024.

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Baufritz: German prefab timber home manufacturer specializing in sustainable, energy-efficient wooden homes with factory precision. Direct competitor offering similar SIPS/timber-frame prefab residential solutions in the DACH region adjacent to Isokern's Netherlands market.
• Binderholz: Austrian manufacturer of solid timber construction elements including CLT, glulam, and prefabricated building components. Comparable as a European supplier of factory-machined timber building elements for residential and commercial construction.
• Wernick Group: UK-based modular and prefab building manufacturer producing timber-frame and modular buildings. Comparable in factory-built prefab construction, modular delivery approach, and serving both residential and commercial markets.
• WeberHaus: One of Germany's largest prefab timber home producers with custom-designed wooden houses. Comparable in offering SIPS and timber-frame prefab homes, end-to-end project delivery, and energy-efficient construction positioning.
• HUF Haus: German post-and-beam timber frame prefab home manufacturer with architect-designed homes. Peer in the premium timber prefab segment, with overlapping customer base (private individuals, architects) and similar product philosophy (factory precision, design freedom).
• SIPs Industries: UK SIPS panel manufacturer producing structural insulated panels for residential and commercial buildings. Most direct product-level competitor in the SIPS category, with similar panel construction and target buyer segment.
• De Groot Vroomshoop: Dutch prefab timber frame producer of modular homes and building elements. Most direct domestic competitor in the Netherlands, sharing SIPS/timber-frame prefab construction methodology and serving similar contractor and private customer segments.
• SchwörerHaus: German prefab home manufacturer producing timber-frame and SIPS-based residential buildings with factory automation. Highly comparable in product (prefabricated wooden houses), manufacturing approach (CNC-machined, factory-built), and customer base (private individuals and developers).
• ZÜBLIN Timber: German timber construction specialist (part of Strabag) producing engineered timber components and prefabricated timber elements for residential and commercial projects. Comparable in producing factory-engineered timber structural elements using CNC processes.

Broad incumbents

• Stora Enso Building Solutions: Large Nordic-Swiss wood products major producing CLT, LVL, and prefabricated wood building solutions. Broader incumbent with overlapping timber prefab component offerings but operating at much larger scale across multiple product lines.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Customer concentration

• Facebookfacebook.com/isokern
• LinkedInlinkedin.com/company/isokern-prefab-bouwsystemen
• Instagraminstagram.com/isokernprefab

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Isokern | prefab bouwsystemen