Isolated, poorly controlled or missing context.
OBSERVE · MEASURE · QUALIFYMake the signal
Make the signal
worth trusting.
Use 30 repeatable observation protocols, 24 measurement guides and 18 evidence-quality frameworks without turning one reading, photograph, odor or sound into a diagnosis.
Choose the layer you need.
Start with the method, understand the measurement, then grade the evidence before acting.
Confidence is earned in stages.
A repeatable association worth preserving.
Confounders remain; repeat with fixed conditions.
Reproducible evidence with explicit limitations.
See the same thing twice.
Each method fixes location, trigger, control area, conditions and stop rules before interpretation.
All 30 protocols →ODOR01
Odor timeline protocol
Track where an odor is first noticed, how it moves, what systems are active and which weather or occupancy changes repeat with it.
Open protocol →DROP02Condensation mapping protocol
Map first appearance, surface temperature, room use, airflow and drying time without assuming that every wet edge is indoor condensation.
Open protocol →IMAGE03Discoloration photo-grid protocol
Create repeatable overview, edge and scale-reference photographs so color change can be compared without losing the original scene.
Open protocol →CRACK04Crack movement observation log
Track width, direction, endpoints, nearby openings and rate of change while keeping structural stop signs explicit.
Open protocol →SOUND05Repeating sound cycle protocol
Link a recurring sound to equipment state, water use, temperature change, wind and location without opening energized or pressurized systems.
Open protocol →THERM06Temperature-gradient walk-through
Compare room, surface and vertical temperature patterns under one stable operating condition before changing settings.
Open protocol →FLOW07Safe airflow-path observation
Observe supply, return and transfer paths with non-combustion indicators while protecting combustion, electrical and access boundaries.
Open protocol →WATER08Moisture-pattern observation
Record edges, materials, direction, active sources, drying behavior and unaffected controls before assigning a cause.
Open protocol →RAIN09Rain-response protocol
Correlate symptom onset with rain intensity, duration, direction, drainage and delayed drying across repeated events.
Open protocol →WIND10Wind-linked symptom protocol
Compare wind direction and pressure-sensitive symptoms such as drafts, odor transport, noise and water entry.
Open protocol →MELT11Snowmelt response protocol
Track roof, grading and below-grade symptoms during thaw while separating meltwater timing from indoor humidity changes.
Open protocol →DRAIN12Drain-odor cycle protocol
Compare fixture use, trap refill, exhaust operation and pressure events without introducing chemicals or dismantling unsafe systems.
Open protocol →A number is not a verdict.
Know the measured quantity, placement, stated accuracy, interferences and the point where qualified measurement is required.
All 24 guides →RH
Relative humidity2 connected questions
↗TEMPAir temperature2 connected questions
↗DEWDew point2 connected questions
↗CO2Carbon dioxide2 connected questions
↗PMParticulate matter2 connected questions
↗VOCVolatile organic compound sensors2 connected questions
↗RADONRadon measurement2 connected questions
↗SURFSurface temperature2 connected questions
↗WOODWood moisture content2 connected questions
↗SCANPinless moisture indication2 connected questions
↗AIRAirflow indication2 connected questions
↗PAPressure difference2 connected questions
↗Make the record auditable.
Preserve originals, define controls, document uncertainty and keep source, transport, material and symptom as separate claims.
All 18 frameworks →TREND
Single reading versus trend
Separate a momentary value from a repeated pattern with known timing, conditions and expected variability.
CTRLAffected area versus control
Use a nearby unaffected comparison to strengthen interpretation without assuming both assemblies are identical.
A/BBefore-and-after evidence quality
Define the baseline, single intervention and predicted response before judging an improvement.
WXWeather context quality
Preserve exact rain, wind, temperature and humidity timing so event-linked symptoms can be tested.
USEOccupancy context quality
Record cooking, bathing, sleeping, doors and ventilation use that can materially change observations.
LIMITInstrument limitation statement
State what the instrument measures, stated accuracy, known interferences and what it cannot prove.
PLACEMeasurement placement quality
Document height, surface, distance, orientation and stabilization so another person can repeat the observation.
TIMETimestamp and clock quality
Keep synchronized clocks and original timestamps across photos, readings, weather and interventions.
PHOTOPhotographic evidence quality
Combine overview, detail, scale and unchanged originals while avoiding edits that replace the source file.
KEEPEvidence preservation quality
Preserve originals, filenames and intervention chronology without overstating legal chain-of-custody claims.
REPEATRepeatability quality
Repeat under comparable conditions and distinguish consistent response from sensor or observer noise.
VARIABLEConfounder control
Change one variable at a time and record simultaneous weather, occupancy or equipment changes.
NEGNegative evidence
Record where and when the symptom did not occur because absence under defined conditions can separate pathways.
UNCERTUncertainty labeling
Use explicit confidence language and unresolved alternatives instead of converting signals into certainty.
PATHSource and transport separation
Keep source, transport route, affected material and visible symptom as separate claims.
HYPHypothesis-led evidence
Write competing explanations and predictions before collecting more data to reduce confirmation bias.
VERIFYRepair verification quality
Define recurrence windows, trigger conditions and control areas before declaring an intervention successful.
HANDProfessional handoff quality
Deliver a concise chronology, evidence table, limitations, actions and questions that a professional can audit.
OBSERVATION SAFETY CONTRACT
Return to What should I do next? →Better evidence does not make unsafe access safe.
Stop at electrical, combustion, contamination, structural, access and acute-health boundaries. HouseSymptoms organizes information; it does not certify a condition, exposure or repair.
