Wood panel structure
Prefabricated wall, floor and roof panels, factory-assembled to a fixed build-up and delivered ready to erect.
Systems
How we work, and what it's built from.
Process
Five stages. One accountable team.
01Design
Architectural solution, structural statics, panel structure, thermal performance, acoustics, fire safety (REI30/60/90), moisture protection and building-services integration.
02Production
Sigulda factory, C24 Latvian timber, up to 1,500 m² produced per month on our own production line.
03Delivery
Packed to a loading plan with optimised cargo geometry for transport to Sweden, Norway and Switzerland. Roughly 40 to 50 m² of building area travels on one truck, auxiliary materials included, and every delivery is verifiable truck by truck.
04Assembly
Assembled on site by MasterIndustry's own crews, never subcontracted. Work happens under roof cover, protected from the weather, with elements sealed and blower-door airtightness tests completed.
05Handover and warranty
Airtightness tested (blower door) as standard, handed over with complete as-built documentation.
Our side
- Architecture, in wood
- Production in the factory
- Transportation to the site
- Montage on site
- Outside ready, on site
- Executive documentation, per the recipient country's rules
Your side
- Securing the project
- Local architects and permitting
- Groundworks, foundation and external utilities
- Crane and site equipment, where agreed
- Inside-ready finishing works
- Landscaping and on-site management
Scope of works
A worked example, line by line.
The scope form for Svartgarn. Every project gets its own.
1Design works
Traditional architectural and structural designTimber structure design
2Groundworks
Earthworks and excavationExternal utilities: water, sewerage, electricityFoundation construction
3.1Building frame
Structural frame productionTransportAssembly and on-site installation
3.2Building envelope
Roofingnot in scopeWindow installationFaçade worksExternal doorsBalcony constructionnot in scope
4Internal utility systems
Electrical installationsPlumbing and sewer systemsHeating systemsVentilation and heat recoveryLow-voltage networks
5Internal finishes
Sanitary units and tilingInterior doorsStaircase installationFlooring worksPainting and wall finishesKitchen installation and fitted equipment
6External infrastructure
Road constructionPedestrian pathwaysChildren's playgroundsLandscaping
MasterIndustry scopeClient or general contractorExcluded from this offer
DIN EN ISO 6946High energy-efficiency buildingsLCA, life-cycle assessmentAirtightness test EN ISO 9972
Source: Form MI_1, Scope of Construction Activities, Rev. 1, 15 May 2026. Scope is set per project.
Illustrative renderAnatomy
A building as a kit of elements.
Wall, floor and roof panels are assembled in the factory, numbered and packed for sequenced assembly on site.
01
Panels
Prefabricated wall, floor and roof panels, built to a fixed build-up and delivered ready to erect.
02
Glulam and CLT
GL24h glulam and cross-laminated panels where the design needs long spans or stiff diaphragms.
03
Numbered for site
Every element is numbered and packed to a loading plan, then lifted into sequence by our crews.
Structures
The structural systems behind every building.
Prefab
Glue-laminated beams
Structural glulam, GL24h grade, for long spans and exposed frame structures.
Cross-laminated timber
CLT panels for floors, walls and roof diaphragms that need high dimensional stability. Floor panels run to 220 mm.
Plywood sheets
Plywood sheets combined with the panel, glulam and CLT structure, on a monolithic concrete foundation with elevator shafts.
Two systems, taken apart.
Wood panel and cross-laminated timber, shown layer by layer.
01
Carbon storage
Sequesters carbon for the structure's lifespan instead of releasing it in production.
02
Strength-to-weight
Timber is light for its strength, which keeps the building light and foundation loads down.
03
Off-site speed
Panels are produced in a controlled factory while site works proceed in parallel.
04
Thermal performance
Insulated panel build-ups are engineered per project using Ubakus hygrothermal modelling.
05
Acoustic comfort
Layered assemblies are specified to meet party-wall and floor acoustic requirements.
06
Fire design
Fire ratings of REI30, REI60 or REI90 are engineered to the specific building.
07
Moisture management
Vapour barrier and breather membrane layers are specified, then tested before handover.
08
Design flexibility
Panel systems adapt from single modular units to multi-apartment developments.
Panel depths at a glance.
Bar length shows relative panel depth
- 245/45Exterior wall
- +350Roof covering panel
- 220Floor panel, cross-laminated timber
- 145/145Internal fire wall between apartments
- 95Internal wall, regular
- 145Internal load-bearing wall
- 195Internal load-bearing wall
How a framed wall panel is made
- 01FrameC24 studs and plates, cut to the list that comes straight from the structural model.
- 02InsulationFitted between the studs in the factory, so the thermal layer is closed before the panel leaves.
- 03SheathingOSB fixed to the frame braces the panel and carries the racking loads.
- 04MembranesA vapour barrier on the warm side controls moisture and supports airtightness; a breather membrane outside lets the wall dry.
- 05OpeningsWindow and door openings are framed and reinforced in the panel, ready for installation.
- 06Numbered for siteEach panel carries its element number and is packed to the loading plan, then set in sequence by our crews.
Assemblies
Eight build-ups, layer by layer.
Calculated values from our assembly sheets. Choose an assembly to see every layer and its thermal data.
Wall · E195HD
Exterior wall
InteriorExterior
Schematic section. Thickness to scale, length not to scale.
U-value0.16W/(m²K)
00.24 limit0.40
33% below the 0.24 reference limit for existing buildings printed on the sheet (GEG 2020/24).
32.1cmTotal thickness
47kg/m²Weight
8.1hPhase shift
13Temperature amplitude damping
28kJ/m²KThermal capacity, inside
45kJ/m²KHeat capacity
Calculation conditions
- Inside air 20 °C / 50 %
- Outside air -5 °C / 80 %
- Surface temperature: 18.8 °C inside · -4.8 °C outside
Used on Svartgarn.
Wall · 145+145
Party wall
Apartment AApartment B
Schematic section. Thickness to scale, length not to scale.
U-value0.13W/(m²K)
00.40
Between two heated rooms. The sheet lists no thermal requirement.
39.4cmTotal thickness
68kg/m²Weight
10.5hPhase shift
24Temperature amplitude damping
41kJ/m²KThermal capacity, inside
83kJ/m²KHeat capacity
Calculation conditions
- Heated room both sides: 20 °C / 50 %
- Surface temperature: 20.0 °C both sides
Used on Svartgarn.
Interior wall · 145
Load-bearing wall
Room ARoom B
Schematic section. Thickness to scale, length not to scale.
U-value0.25W/(m²K)
00.40
Between two heated rooms. The sheet lists no thermal requirement.
19.4cmTotal thickness
41kg/m²Weight
6.8hPhase shift
7.2Temperature amplitude damping
26kJ/m²KThermal capacity, inside
54kJ/m²KHeat capacity
Calculation conditions
- Heated room both sides: 20 °C / 50 %
- Surface temperature: 20.0 °C both sides
Interior wall · 95
Interior wall
Room ARoom B
Schematic section. Thickness to scale, length not to scale.
U-value0.35W/(m²K)
00.40
Between two heated rooms. The sheet lists no thermal requirement.
14.4cmTotal thickness
38kg/m²Weight
6.2hPhase shift
4.8Temperature amplitude damping
23kJ/m²KThermal capacity, inside
49kJ/m²KHeat capacity
Calculation conditions
- Heated room both sides: 20 °C / 50 %
- Surface temperature: 20.0 °C both sides
Floor · 245
Intermediate floor
TopUnderside
Schematic section. Thickness to scale, length not to scale.
U-value0.15W/(m²K)
00.40
Between two heated rooms. The sheet lists no thermal requirement.
36.1cmTotal thickness
62kg/m²Weight
10.0hPhase shift
38Temperature amplitude damping
90kJ/m²KHeat capacity
Calculation conditions
- Heated room both sides: 20 °C / 50 %
- Surface temperature: 23.1 °C top · 20.0 °C underside
Ceiling · A400RJ
Upper floor ceiling
InteriorUnheated space
Schematic section. Thickness to scale, length not to scale.
U-value0.11W/(m²K)
00.24 limit0.40
54% below the 0.24 reference limit for existing buildings printed on the sheet (GEG 2020/24).
45.8cmTotal thickness
49kg/m²Weight
12.5hPhase shift
19Temperature amplitude damping
29kJ/m²KThermal capacity, inside
50kJ/m²KHeat capacity
Calculation conditions
- Inside air 20 °C / 50 %
- Unheated space -5 °C / 80 %
- Surface temperature: 19.1 °C inside · -4.9 °C outside
Balcony · Ceiling
Insulated balcony
InteriorExterior
Schematic section. Thickness to scale, length not to scale.
U-value0.14W/(m²K)
00.24 limit0.40
42% below the 0.24 reference limit for existing buildings printed on the sheet (GEG 2020/24).
54.4cmTotal thickness
66kg/m²Weight
8.4hPhase shift
7.7Temperature amplitude damping
17.6kJ/m²KThermal capacity, inside
30kJ/m²KHeat capacity
Calculation conditions
- Inside air 20 °C / 50 %
- Unheated space -5 °C / 80 %
- Surface temperature: 19.0 °C inside · -4.9 °C outside
Roof · Roof construction
Rafter roof
Roof spaceExterior
Schematic section. Thickness to scale, length not to scale.
U-value2.68W/(m²K)
Off the scale: no insulation layer in this build-up.
39.0cmTotal thickness
88kg/m²Weight
0.3hPhase shift
1.0Temperature amplitude damping
4.4kJ/m²KThermal capacity, inside
16.5kJ/m²KHeat capacity
Calculation conditions
- Roof space -5 °C / 50 %
- Outside air -5 °C / 80 %
- Surface temperature: -5.0 °C both sides
This build-up has no insulation layer. Thermal protection comes from the ceiling below it.
All eight at a glance.
U-value in W/(m²K). Lower is better.
- AssemblyU-valueThicknessWeight
- Exterior wallE195HD0.1632.1 cm47 kg/m²
- Party wall145+1450.1339.4 cm68 kg/m²
- Load-bearing wall1450.2519.4 cm41 kg/m²
- Interior wall950.3514.4 cm38 kg/m²
- Intermediate floor2450.1536.1 cm62 kg/m²
- Upper floor ceilingA400RJ0.1145.8 cm49 kg/m²
- Insulated balconyCeiling0.1454.4 cm66 kg/m²
- Rafter roofRoof construction2.6839.0 cm88 kg/m²
Values are calculated, not measured, and are taken from each assembly sheet. Wall, ceiling and balcony sheets use inside air at 20 °C and 50 % humidity; rooms between two heated spaces carry no thermal requirement on the sheet. Full assembly sheets are issued on request.
Request the assembly sheetsOn site
From foundation to roof, in sequence.
Our crews set elements under roof cover. Each step below is an illustrative render.
Engineering
The stack behind every calculation.
01
LCA
Life-cycle assessment per project to quantify embodied and operational impact.
02
EPD
Environmental Product Declarations in progress for core panel systems. See the certification roadmap.
03
SEMA
Production-engineering software that turns structural design directly into factory cutting lists.
04
Ubakus
Hygrothermal modelling for U-values and condensation risk in every wall build-up.
05
Passivhaus
Passive House methodology available on request for qualifying projects.
06
CO2-Zero
A carbon-reduction strategy across material sourcing and production. Target dates are on the roadmap.
Full engineering reports (Ubakus outputs, LCA data, SEMA production files) are issued on request.
Request the engineering packDocuments
Documents, not renders.
Optional on request: CO2-zero calculation, energy certification and LCA. Full drawing sets are issued per project.
Ask for a sample setStart a project
Tell us what you're building and where.
We reply with a realistic lead time, not a sales call.