🔨 Interior ToolPersonal / Pro

Wood Ceiling Framing Simulator

Draw the room → auto-calc battens, fiber-cement boards, hangers →
Print an A4 quote.

Living room, dining room, hallway — what used to take an afternoon now takes 30 seconds. Main + sub battens auto-align with board seams, hangers distribute evenly, and you can compare 4×8 vs 3×6 board specs to see which wastes less.

Included in Personal plan — one key unlocks all 25 furniture templates.

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The 4 worst things about wood ceiling work

Exactly what this tool was built to fix

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Adding up batten meters is dizzying

12-ft main battens, sub battens criss-crossing one by one, and rooms aren't perfect rectangles. Miss one and you're back at the lumber yard.

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Board seams missing the battens

Fiber-cement seams float between battens → unsupported edges, cracks by year-end. Aligning them by hand is exhausting.

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Order 4×8 or 3×6 boards?

Different prices, different waste. Guessing usually overshoots by 20%.

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Quoting means opening Excel again

Once you finish counting, you still type Excel, paste a logo, format A4. Change a dimension and redo it all — half a day gone.

What this tool does

Room shape → batten BOM → quote, end to end

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Room shape: rectangle / L / U / bay window

Drag length & width, L-shape inner corners, U-shape, pull bay windows out separately. 2D recalc live, 3D structure live.

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Main + sub battens auto-laid

36×30 mm battens (one spec for perimeter, main and sub; width and thickness each tunable 20–60 mm). Main-batten centers follow the board width, sub battens land near 36 cm — auto-tiled across the whole room.

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Auto board layout

Switch 4×8 vs 3×6 specs side by side. Seams snap to batten centerlines — edges always supported.

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Even hanger distribution

Hangers run along every main batten from both ends inward, 90 cm centers by default (tunable 45–150 cm), cross-joints emphasized for 3D legibility.

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3D 8-layer toggles

Slab / hangers / main battens / sub battens / boards / joints — toggle each. Clients grasp install order at a glance.

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A4 quote + CSV BOM

Client info, line items, totals, terms — one A4 page. BOM exports to CSV for the crew.

Parameters you can tweak

The algorithm auto-calculates battens, board seams, hanger spread.

Room shape (rectangle / L / U / bay window)

Live 3D as you drag length/width, L/U inner corners tunable, bay windows pulled separately.

Ceiling height

Distance from original slab to wood ceiling — hanger length is auto-calculated.

Main batten spacing

Auto by default: main-batten centers = board width + seam gap — 90.3 cm for 3×6 boards, 120.3 cm for 4×8 — so seams always land on batten centers. Uncheck auto to drag it 30–120 cm.

Sub batten spacing

By default the board length is divided down to the nearest 36 cm: 36 cm for 3×6 boards, 34.3 cm for 4×8, so board-edge seams sit on a sub batten. Manual range 20–60 cm.

Fiber-cement board spec (4×8 / 3×6)

Toggle to see which spec wastes less — 4×8 means big sheets and low waste; 3×6 ships easier.

Hanger spacing

90 cm along every main batten by default (one at each end), tunable 45–150 cm. In "minimal" mode each main batten only gets one hanger per end.

Trim / molding (optional)

Add perimeter molding (PS or wood), with door openings auto-deducted from total meters.

Light-fixture openings (reserved)

Mark recessed-light positions and the BOM annotates board cuts so you don't over-cut.

Auto-generated outputs

Six artifacts at once — print A4 and bring it to the shop or hand it to the client.

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Batten BOM

Main and sub batten meters & counts, with 12-ft / 8-ft stock cut plans laid out.

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Board layout drawing

Compare 4×8 vs 3×6, see which wastes less; 2D layout with auto-numbered panels.

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Hanger spread table

Hanger count and center spacing per main batten (90 cm by default), with hanger drop derived from slab height minus ceiling height.

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3D 8-layer breakdown

Slab / hangers / main battens / sub battens / boards / joints — toggle each.

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A4 quote

Client info + line items + totals + terms on one A4 page. Save as PDF from your browser.

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BOM CSV export

Excel opens cleanly, crews use it for procurement directly.

Real outputs

These are actual artifacts the tool produces — they update live as you change dimensions.

2D plan + main/sub batten grid
Drag room dimensions, framing lays out automatically, seams always land on batten centers.

3D structure with 8 toggleable layers
Slab / hangers / main / sub / boards / joints — clients grasp install order in seconds.

Cut plan + BOM
How each 12-ft batten gets cut, with offcut sizes — hand it to the lumber yard and they cut accordingly.

※ Change dimensions / switch board specs / change batten spacing — these all redraw live.

Who it's for

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Carpenters / drywall installers

Client asks 'how much for a living room ceiling per ping' — pull out your phone, change dimensions, quote re-issues instantly.

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GCs / interior designers

Put a 3D view + quote in one proposal, client closes on the spot. Spec changes don't require a redraw.

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DIY wood ceiling builders

Draw the room → tool tells you to order N 12-ft battens, M fiber-cement boards. Walk into the lumber yard ready.

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Carpentry academy students

Run the framing logic from class on real numbers. Bridge from practice to client work seamlessly.

⚠️ Not for these situations

Steel-stud / drywall systems — this tool computes wood framing, not T-bar steel
Non-orthogonal rooms (slanted walls, curves, multiple bays) — v1 supports rectangle, L, and small bay extrusions
Precise positioning of HVAC vents / light openings — this tool sizes framing and boards, not openings
Existing CAD/Revit workflows — this fills the gap for those who lack CAD but still need takeoffs

When you'll use it

🔨 On-site quoting

Client asks 'how much for the living room ceiling per ping' — pull out your phone, criss-cross framing + board layout + hangers, A4 quote in 30 seconds, close right there.

🪜 GC / designer pitch

Pitch ceiling, floor, raised platform together: 3D + quote on one sheet, clients read drawings 10× faster than Excel — no overnight grind.

🏠 DIY home renovation

Tearing down an old drop ceiling, rebuilding wood framing: draw the room → tool tells you how many 12-ft battens and fiber-cement boards to order. Skip asking the contractor.

🎓 Carpentry academy student

The framing logic and seam-alignment principles you learned in class — this tool lets you see how the algorithm computes them. Bridge from practice to client work.

FAQ

How far apart should ceiling furring battens be?▾

Main (heavy) battens: centers = board width + seam gap — 90.3 cm for 3×6 boards (90×180 cm), 120.3 cm for 4×8 (120×240 cm) — so every board seam lands on a batten center and board edges are always supported. Sub (light) battens divide the board length down to the nearest 36 cm: 36 cm for 3×6, 34.3 cm for 4×8. Hangers go every 90 cm along each main batten. The tool does all of this automatically; uncheck "auto spacing from board spec" to drag main 30–120 cm and sub 20–60 cm yourself.

How does wood ceiling framing differ from steel-stud T-bar?▾

Wood framing uses 'batten grid + fiber-cement boards' — 12-ft battens with boards screwed on, supports light fixtures, allows shaping. Steel T-bar uses T-bars + mineral fiber tiles, modular and easy to dismantle but weak load and hard to shape. This tool calculates wood framing.

Should I order 4×8 or 3×6 boards?▾

4×8 (122×244 cm) is the most common in Taiwan — large sheet, good for big living/dining rooms. 3×6 (91×183 cm) is smaller, less waste in small spaces, easier to transport. This tool toggles both specs and compares waste automatically.

Do seams really auto-align with battens?▾

Yes. The system back-solves main batten spacing as 'board short edge ÷ N', so board seams always land on batten centerlines — edges always supported, no year-end cracks. Switch board spec (4×8 / 3×6) and batten spacing auto-updates.

Can I export PDF / CSV?▾

A4 quotes print straight from the browser → Save as PDF. Logo / company info / terms are filled once in 'Branding' panel and reused. BOM exports to CSV, Excel opens cleanly.

How much does the tool cost?▾

Pro Monthly $9/mo — includes all 25 furniture templates + ceiling framing + floor simulator + raised platform. Pro Annual $79/yr — adds client quoting system + STL/CNC export + unlimited dimensions.

Can I buy just this tool?▾

Yes. Find the single-tool unlock for ceiling on /pricing. But Personal covers all 25 furniture + 4 interior tools — most people end up subscribing to Personal instead.

What about my bay window or slanted wall?▾

v1 supports rectangle, L, and small bay extrusions. Non-orthogonal (slanted walls, curves) are on the roadmap, with seamless upgrade.

Will the tool keep getting updates?▾

Yes. 3D layer toggles, board layout, joint emphasis — all added incrementally after launch. Roadmap: multi-fixture/vent openings, auto load calc, RC slab field data integration.

How to unlock Ceiling Framing

Pick one of three paths

Single buy

Single-tool unlock

$14.99lifetime

✓Permanent unlock of ceiling tool
✓Use it without subscribing
✓Future improvements auto-included

View single-buy plan

Personal subscription

$9/mo

✓All 25 furniture templates unlocked
✓Ceiling + floor + raised platform
✓Unlimited PDF print + cloud storage

Upgrade Personal

Pro tier

Pro subscription

$79/mo

✓Everything in Personal
✓Client quoting + customer management
✓STL/OBJ export + unlimited dimensions

Upgrade Pro

Annual plan saves one extra month · Academy lifetime members DM for code ·see full plan comparison

Companion tools to win projects and crunch numbers together

🪵

Floor installation simulator

Plank floor takeoff + 5 layout patterns + A4 quote. Pitching ceiling + floor together is gold.

🏯

Tatami raised platform calculator

30 cm+ platforms — frame + plywood + underlay + skirting, end to end.

🪑

25 furniture templates

From pencil holders to wardrobes — interior projects often pair with furniture.

Skip the afternoon math, keep the quote

Less than a cup of coffee, a full toolkit comes with you.
Includes furniture templates + floor + raised platform — every interior takeoff in one place.

Pro Monthly $9/mo · all 25 furniture templates + ceiling + floor + raised platform