The library
Field guides
How to read a room and test a change before buying anything — with the sources behind each rule of thumb. Read in the order below and each guide sets up the next; jump straight to the one you need if you already know what you are looking for.
Your learning path
Your path
0 of 9 read
Nine guides, in a deliberate order: measure first, then read movement, then change one thing and check it. Start at the top and the later guides make sense when you reach them.
Next · step 1 of 9 · measuring
A product fit check is only as good as the room survey
Every other guide assumes a measurement you trust. Start here so the numbers the rest of the app reasons about are real ones.
Try it in a real room. Measure one wall twice, on different days, without looking at the first result. If the two disagree, you have found your own margin of error — write it down.
Foundation
0 of 3 read
Observe the room before changing it. These three make every later reading trustworthy: an unmeasured room cannot be planned, and a room read empty is not the room you live in.
- measuringA product fit check is only as good as the room surveyEvery other guide assumes a measurement you trust. Start here so the numbers the rest of the app reasons about are real ones.Not read yet
- circulationRead the occupied room, not the empty floorThe room you walk through is not the floor plan you draw. This teaches you to read the occupied room, which is what actually frustrates people.Not read yet
- zoningGive each job an edge before you give it more stuffOnce you can see movement, you can give each job its own edge — the cheapest fix available, because it usually costs nothing.Not read yet
Working
0 of 3 read
Change one thing and find out whether it helped. Light, a written prediction, and money held back for what you have not found yet.
- light and hierarchyLayer light by job, height and time of dayA room that fails only after dark is a lighting problem wearing a layout problem's clothes. This separates the two.Not read yet
- experimentsWrite the prediction before the room changesThe difference between a change and a test is that a test was predicted in advance. This is the habit the whole method rests on.Not read yet
- budget architectureProtect the unknown before spending the remainderMost overspending is not extravagance, it is spending the contingency before finding the real problem. Hold money back for what you have not found.Not read yet
Advanced
0 of 3 read
Judge results and widen the frame — comparing fairly, repurposing a room, and treating the house as connected rather than a set of rooms.
- comparisonCompare like with like before calling it improvementTwo readings taken under different conditions are not a comparison. This is how you avoid calling a change an improvement when nothing improved.Not read yet
- adaptive useA second life has to beat the room's current job on constraintsRepurposing a room is only a good idea when the new job beats the current one on constraints — not on enthusiasm.Not read yet
- whole-house flowFix transfers, not rooms in isolationSome room problems are not in the room. Once you can read one room well, the transfers between rooms are the next thing worth fixing.Not read yet
All nine guides
- Field guide · circulationRead the occupied room, not the empty floorA route is the space a body needs while doors, chairs, drawers and furniture are in the positions people actually use. A piece can fit geometrically and still fail the room once it is occupied.
- Field guide · zoningGive each job an edge before you give it more stuffTwo activities can share a room when each has a legible territory, a route that does not cut through the other job, and enough sensory separation for both to work.
- Field guide · light and hierarchyLayer light by job, height and time of dayOne bright source is not the same as a well-lit room. Useful light is layered: ambient light lets you orient, task light supports the work, and accent light creates hierarchy without asking the whole room to be brighter.
- Field guide · measuringA product fit check is only as good as the room surveyWidth and depth are not enough. A usable survey records the room perimeter, openings, fixed projections and the dimensions that change when something opens, pulls out, or is occupied.
- Field guide · experimentsWrite the prediction before the room changesA reversible change becomes useful evidence only when the expected effect is written down before the change, the observation window is long enough for the room's real use, and the same condition is read again afterward.
- Field guide · budget architectureProtect the unknown before spending the remainderA room budget is not a shopping allowance. Known commitments come out first, a reserve protects costs that are not yet known, and the remainder funds reversible evidence before permanent atmosphere.
- Field guide · comparisonCompare like with like before calling it improvementBefore-and-after evidence is strongest when the same room, same scoring definitions, and comparable use conditions are aligned. Two different rooms can still be compared, but that is benchmarking — not proof that one intervention caused the difference.
- Field guide · adaptive useA second life has to beat the room's current job on constraintsReassigning a room is not a naming exercise. A candidate use must fit the floor, openings, daylight, privacy, storage, circulation and household demand — and the current use remains a legitimate competitor.
- Field guide · whole-house flowFix transfers, not rooms in isolationRooms are a system. Storage, noise, traffic, work, hosting and reset load move between them. Improving one room can make the house worse if the displaced job has nowhere credible to land.