timber-external
- Geometric consumption
- 6.69 m3
- Required parts
- 7.551 m3
- Purchased stock
- 70 pieces
- Cutting offcuts
- 1.894 m3
- Kerf waste
- 0.005 m3
- Additional reserve
- 4 piece
Timber bathhouse planner
Sketch layout and preliminary material estimate
Structural solutions require separate verification.
Editable educational example. All dimensions and assumptions can be changed. This is not a ready construction design.
v1.0.0 · Geometry checked · Quantity checked · Engineering unverified
White = doors; blue = windows. All annotations in metres. Room dimensions exclude wall and partition thickness.
- External building area
- 24 m²
- Reported footprint
- 24 m²
- Clean room area
- 20.282 m²
- Courses
- 18
- Roof high point
- 3.333 m
- Vestibule / changing: 5.7 × 1.224 m · 6.977 m² · 16.744 m³
- Steam room: 3.08 × 2.376 m · 7.318 m² · 17.563 m³
- Washing / changing: 2.52 × 2.376 m · 5.988 m² · 14.37 m³
Material quantities
Timber geometric and part quantities are m³; stock and reserve are pieces. Other stock counts are NOT_CALCULATED. Layer area and volume are alternative views: price only one basis. Optional prices use your chosen consistent currency.
timber-partitions
- Geometric consumption
- 1.672 m3
- Required parts
- 1.908 m3
- Purchased stock
- 22 pieces
- Cutting offcuts
- 0.07 m3
- Kerf waste
- 0.003 m3
- Additional reserve
- 2 piece
Inspect 22 stock pieces and cutting
sealing
- Geometric consumption
- 434.692 m
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 21.735 m
floor-boards
- Geometric consumption
- 20.282 m2
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 1.014 m2
floor-boards-volume
- Geometric consumption
- 0.568 m3
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 0.028 m3
ceiling-insulation
- Geometric consumption
- 20.282 m2
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 1.014 m2
ceiling-insulation-volume
- Geometric consumption
- 3.042 m3
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 0.152 m3
lining-lining
- Geometric consumption
- 75.645 m2
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 3.782 m2
lining-lining-volume
- Geometric consumption
- 0.908 m3
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 0.045 m3
roof-covering
- Geometric consumption
- 33.499 m2
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 1.675 m2
roof-eaves
- Geometric consumption
- 13.2 m
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 0.66 m
roof-ridge
- Geometric consumption
- 6.6 m
- Required parts
- NOT_CALCULATED
- Purchased stock
- NOT_CALCULATED
- Cutting offcuts
- NOT_CALCULATED
- Kerf waste
- NOT_CALCULATED
- Additional reserve
- 0.33 m
Incomplete cost and uncalculated work
No prices entered.
- Foundation type, depth and reinforcement
- Roof framing, gable infill / mono-pitch high-wall infill
- Corner joinery, connections, lintels and fastening
- Labor, delivery and utilities
- Stove, chimney and engineering systems
- Moisture, drainage and fire protection
- Terrace construction and roof
- sealing: purchased stock layout
- floor-boards: purchased stock layout
- floor-boards-volume: purchased stock layout
- ceiling-insulation: purchased stock layout
- ceiling-insulation-volume: purchased stock layout
- lining-lining: purchased stock layout
- lining-lining-volume: purchased stock layout
- roof-covering: purchased stock layout
- roof-eaves: purchased stock layout
- roof-ridge: purchased stock layout
Template and calculation assumptions
- Rectangular single-storey timber shell; no corner tails or structural joinery allowance.
- North/south walls run full length. East/west walls fit between them. Partitions butt against walls; intersections counted once.
- Internal doors are centered on each partition. Custom openings use offsets from the wall segment start.
- No structural, moisture, fire or regional sauna compliance verification.
- Front vestibule occupies 34% of interior depth; rear separate steam room and combined washing/changing room split at 55% of interior length. Combined describes the washing/changing function; the steam room remains separate.
- Courses are rounded up; boundary-course trimming is retained in the part allowance. Net geometric volume excludes openings exactly.
- Partition stock has its own section; stock bins and reserve are separate from external-wall timber.
- Joins, if enabled, are length accounting only and require separate design verification.
Compare valid variants (3)
Lowest timber consumption among shown variants: BAT-02. Compare layouts and material groups before choosing.
BAT-01
Vestibule / changing: 6.977 m²
Steam room: 7.318 m²
Washing / changing: 5.988 m²
Timber: 8.362 m³
Stock: 92 pieces
Offcuts: 1.964 m³
Additional timber reserve: 6 pieces
Partial cost: Unpriced
All material groups
timber-external: 6.69 m3; reserve 4 piece; stock 70
timber-partitions: 1.672 m3; reserve 2 piece; stock 22
sealing: 434.692 m; reserve 21.735 m; stock NOT_CALCULATED
floor-boards: 20.282 m2; reserve 1.014 m2; stock NOT_CALCULATED
floor-boards-volume: 0.568 m3; reserve 0.028 m3; stock NOT_CALCULATED
ceiling-insulation: 20.282 m2; reserve 1.014 m2; stock NOT_CALCULATED
ceiling-insulation-volume: 3.042 m3; reserve 0.152 m3; stock NOT_CALCULATED
lining-lining: 75.645 m2; reserve 3.782 m2; stock NOT_CALCULATED
lining-lining-volume: 0.908 m3; reserve 0.045 m3; stock NOT_CALCULATED
roof-covering: 33.499 m2; reserve 1.675 m2; stock NOT_CALCULATED
roof-eaves: 13.2 m; reserve 0.66 m; stock NOT_CALCULATED
roof-ridge: 6.6 m; reserve 0.33 m; stock NOT_CALCULATED
BAT-02
Rest room: 9.946 m²
Steam room: 5.242 m²
Washing room: 5.242 m²
Timber: 8.011 m³
Stock: 88 pieces
Offcuts: 1.999 m³
Additional timber reserve: 5 pieces
Partial cost: Unpriced
All material groups
timber-external: 6.69 m3; reserve 4 piece; stock 70
timber-partitions: 1.321 m3; reserve 1 piece; stock 18
sealing: 409.804 m; reserve 20.49 m; stock NOT_CALCULATED
floor-boards: 20.429 m2; reserve 1.021 m2; stock NOT_CALCULATED
floor-boards-volume: 0.572 m3; reserve 0.029 m3; stock NOT_CALCULATED
ceiling-insulation: 20.429 m2; reserve 1.021 m2; stock NOT_CALCULATED
ceiling-insulation-volume: 3.064 m3; reserve 0.153 m3; stock NOT_CALCULATED
lining-lining: 68.618 m2; reserve 3.431 m2; stock NOT_CALCULATED
lining-lining-volume: 0.823 m3; reserve 0.041 m3; stock NOT_CALCULATED
roof-covering: 33.499 m2; reserve 1.675 m2; stock NOT_CALCULATED
roof-eaves: 13.2 m; reserve 0.66 m; stock NOT_CALCULATED
roof-ridge: 6.6 m; reserve 0.33 m; stock NOT_CALCULATED
BAT-03
Rest room: 7.798 m²
Steam room: 7.25 m²
Washing room: 5.25 m²
Timber: 8.328 m³
Stock: 92 pieces
Offcuts: 2.003 m³
Additional timber reserve: 6 pieces
Partial cost: Unpriced
All material groups
timber-external: 6.69 m3; reserve 4 piece; stock 70
timber-partitions: 1.638 m3; reserve 2 piece; stock 22
sealing: 432.244 m; reserve 21.612 m; stock NOT_CALCULATED
floor-boards: 20.297 m2; reserve 1.015 m2; stock NOT_CALCULATED
floor-boards-volume: 0.568 m3; reserve 0.028 m3; stock NOT_CALCULATED
ceiling-insulation: 20.297 m2; reserve 1.015 m2; stock NOT_CALCULATED
ceiling-insulation-volume: 3.045 m3; reserve 0.152 m3; stock NOT_CALCULATED
lining-lining: 74.954 m2; reserve 3.748 m2; stock NOT_CALCULATED
lining-lining-volume: 0.899 m3; reserve 0.045 m3; stock NOT_CALCULATED
roof-covering: 33.499 m2; reserve 1.675 m2; stock NOT_CALCULATED
roof-eaves: 13.2 m; reserve 0.66 m; stock NOT_CALCULATED
roof-ridge: 6.6 m; reserve 0.33 m; stock NOT_CALCULATED
Example and dimensions
Editable example: 6 × 4 m, wall height 2.4 m, 150 × 150 mm timber, 140 mm working course height, 6 m stock and 3 mm kerf. A 4 × 1.5 m terrace remains separate.
Required inputs
External dimensions, timber section and course height, room preferences, doors/windows, partitions, slope, overhang, layers, reserve and optional user prices.
Formulas and assumptions
Clean interior excludes two wall thicknesses and partitions. Areas and volumes come from the same room rectangles as SVG. Courses round up; exact opening volume is removed geometrically, while boundary-course parts keep site-trimming allowance.
Geometric consumption, parts, stock, offcuts, kerf and user reserve are separate. Stock without a layout algorithm is NOT_CALCULATED. Fasteners are preliminary estimates from explicit spacing and connection-count assumptions. Prices come from the user; labor, delivery, utilities and unpriced items are excluded.
Limitations
No structural, foundation, stove, chimney or fire-clearance design. Roof framing, joinery and terrace construction remain uncalculated.
Related calculators
These links do not select structural solutions. Foundation dimensions require independent specification.