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High Castle™
HC technologies
Our Prefabricated Timber Frame Panel System Specification
Our Prefabricated Timber Frame Panel System Specification
Following pages contain our most often used types of factory manufactured panels – wall structures for whole building, giving a clear understanding of their structure and insulation properties.
However, every building is unique in design and sustainability requirements; therefore our engineers are ready to tailor the appropriate solution for each project. One of the main advantages of High Castle is the fexibility in the manufacturing of panels tailored to your needs, with various stud sizes and materials.
External wall construction
- Breather Membrane
- 12mm OSB3 Sheathing (or equivalent)
- Timber stud
- Mineral wool Thermal insulation
(Density: 16-18 kg/m³, λ=0.037W/m·K)
- Timber Structural noggings
- Vapour check layer
| Available Stud Thicknesses, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Internal wall construction
Load-bearing and non Load-bearing
- Insulation — Mineral wool
50 mm/70 mm/100 mm/150 mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
- Timber Stud
70 mm/95 mm/145 mm × 45 mm
Distance between Studs: max 600 mm (Moisture content: W=18 ±2%)
- Timber structural noggings
70 mm/95 mm/145 mm × 45 mm
(Moisture content: W=18 ±2%)
| Available Stud Thicknesses, mm² |
Sound/Thermal Insulation, mm |
| 70 × 45 |
50 |
| 95 × 45 |
70 |
| 100 |
| 145 × 45 |
100 |
| 150 |
Party wall construction
- Vapour check layer
- 95mm / 145mm Timber stud, distance between stud centres: max 600mm
- 150mm Mineral wool insulation
(Density: 16-18 kg/m³, λ=0.037W/m·K)
- Timber Structural noggings
- 12mm OSB3 (or equivalent)
- 50mm Ventilated Cavity
Intermediary floor partitions
195mm floor joist construction
- 22mm OSB3 Sheathing (or equivalent)
- Timber joists 195 × 45mm
- Thermal & sound insulation –
Mineral Wool 100mm / 195mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
220mm floor joist construction
- 22mm OSB3 Sheathing (or equivalent)
- Timber joists 220 × 45mm
- Thermal & sound insulation –
Mineral Wool 100mm / 220mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
220mm Web–joist construction
- 22mm OSB3 Sheathing (or equivalent)
- I–joists 220 × 70mm
- Thermal & sound insulation –
Mineral Wool 100mm / 220mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
254mm Web–joist construction
- 22mm OSB3 Sheathing (or equivalent)
- I–joists 254 × 70mm
- Thermal & sound insulation –
Mineral Wool 100mm / 220mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
External finishes
Typical external wall section
Brick-Clad finish with 50mm Cavity
- Brickwork
- 50mm Ventilated Cavity
- Breather Membrane
- 12mm OSB3 Sheathing (or equivalent)
- Timber stud
- Thermal insulation –
Mineral Wool (Density: 16-18kg/m³, λ=0.037 W/m·K)
- Vapour control layer 0.2mm
- 12.5/15.0mm Plasterboard
Rendered Polystyrene finish
- 5-7mm Render
- 30mm/50mm Thermal insulation – Polystyrene
| Stud Thickness, mm² |
External insulation, mm |
U-value*, W/(m²K) |
| 145 × 45 |
30 |
0.24 |
| 50 |
0.21 |
| 195 × 45 |
30 |
0.19 |
| 50 |
0.17 |
| 220 × 45 |
30 |
0.17 |
| 50 |
0.16 |
Rendered Rigid Thermal insulation finish
- 5-7mm Render
- 30mm/50mm Thermal insulation – Rockwool (or equivalent)
| Stud Thickness, mm² |
External insulation, mm |
U-value*, W/(m²K) |
| 145 × 45 |
30 |
0.24 |
| 50 |
0.21 |
| 195 × 45 |
30 |
0.19 |
| 50 |
0.17 |
| 220 × 45 |
30 |
0.17 |
| 50 |
0.16 |
Horizontal Timber Cladding finish on vertical battens
- 18mm Timber cladding
- Vertical batten 25×45mm,
distance max 600mm at centres
- Horizontal batten 25×45mm,
distance max 600mm at centres
| Stud Thickness, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Vertical Timber Cladding finish on horizontal battens
- 18mm Timber cladding
- Horizontal batten 25×45mm,
distance max 600mm at centres
| Stud Thickness, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Rendered Cement Board finish
- 5-7mm Render
- External sheathing, usually cement board
- Vertical battens 25×45mm,
distance max 600mm at centres
- Horizontal battens 25×45mm,
distance max 600mm at centres
| Stud Thickness, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Brick Slip / tile finish on Polystyrene insulation
- Hard-baked tiles (clinker)
- Glue ~5mm
- 30mm / 50mm Thermal insulation – Polystyrene
| Stud Thickness, mm² |
External insulation, mm |
U-value*, W/(m²K) |
| 145 × 45 |
30 |
0.24 |
| 50 |
0.21 |
| 195 × 45 |
30 |
0.19 |
| 50 |
0.17 |
| 220 × 45 |
30 |
0.17 |
| 50 |
0.16 |
Rendered Block finish
- 3mm Render
- 100mm Blockwork
- 50mm Ventilated Cavity
| Stud Thickness, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Brick-Clad finish with 50mm Cavity
- Brickwork
- 50mm Ventilated Cavity
| Stud Thickness, mm² |
U-value*, W/(m²K) |
| 120 × 45 |
0.35 |
| 145 × 45 |
0.30 |
| 195 × 45 |
0.23 |
| 220 × 45 |
0.20 |
Internal finishes
Single Layer Plasterboard
Double Layer Plasterboard
- Plasterboard 12.5/15.0mm single/double
Single Layer Plasterboard on service battens
(for External & Party walls)
Double Layer Plasterboard on service battens
(for External & Party walls)
- Plasterboard 12.5/15.0mm single/double
- Horizontal / Vertical battens 45×25mm
Roof panel construction
Roof Panel with 195mm / 220mm Rafters
| Stud Thickness, mm² |
U-value, W/(m²K) |
| 195 × 45 |
0.22 |
| 220 × 45 |
0.21 |
Roof Cover
- Roof covering
- Tiling battens 35×28mm
- Main battens 25×45mm
Roof Panel Construction
- Breather Membrane
- Timber rafters 195×45mm/220×45mm
- Thermal insulation –
Mineral wool 195mm/220mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
- Timber Structural noggings
- Vapour control layer
Roof Cover
- 12mm OSB3 (or equivalent)
- 12.5/15.0mm Plasterboard (single or double layer)
Roof Panel with 195mm / 220mm Rafters + 95mm Extra Insulation
| Stud Thickness, mm² |
U-value, W/(m²K) |
195 × 45
+ 95mm insulation |
0.14 |
220 × 45
+ 95mm insulation |
0.12 |
Roof Cover
- Roof covering
- Tiling battens 35×28mm
- Main battens 25×45mm
Roof Panel Construction
- Breather Membrane
- Timber rafters 195×45mm/220×45mm
- Thermal insulation –
Mineral wool 195mm/220mm
(Density: 16-18kg/m³, λ=0.037 W/m·K)
- Timber Structural noggings
- 95x45mm battens for extra insulation
- 100mm mineral wool insulation
(Density: 16-18kg/m³, λ=0.037 W/m·K)
- Vapour control layer
Roof Cover
- 12mm OSB3 (or equivalent)
- 12.5/15.0mm Plasterboard (single or double layer)
Floor finishes
Laminate Flooring
- 8mm Laminate Flooring
- 3mm Underla
Carpet Flooring
Laminate Flooring with Acoustic Board
- 8mm Laminate Flooring
- 3mm Underla
- 28mm CELLECTA ScreedBoard
(Used only in blocks of flats)
Tiled Flooring with Acoustic Board
- Tiles
- 28mm CELLECTA ScreedBoard
(Used only in blocks of flats)
Loft Floor Construction
- Timber boards
- Breather Membrane
- Vapour Control Layer
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