Diagnostic guides
Practical workflows adapted to specific areas and investigation goals.
Self-help workflow: an interior leak during snowmelt near the eaves
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: water marks below a roof valley
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a ceiling stain that appears after wind-driven rain
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a skylight drip that begins during thaw
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a stain near a chimney after rain
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: an exterior wall stain below a gutter
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Documenting electrical warning signs without opening equipment
A safe, repeatable workflow for documenting electrical heat is a stop signal, not a diy clue hunt before opening or repairing the assembly.
Self-help workflow: a warm outlet or burning-plastic odor
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a ceiling stain that appears after shower use
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: fireplace odor when exhaust fans run
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: water appearing at the basement floor-wall joint
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Building a rainfall, grading and discharge evidence map
A safe, repeatable workflow for documenting basement water starts outside the visible mark before opening or repairing the assembly.
Self-help workflow: a crawlspace odor that is strongest upstairs
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a diagonal crack above a door
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a draft felt around an exterior-wall outlet
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a drain that gurgles when another fixture empties
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a roof leak that appears hours after rain
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a stair-step crack in masonry
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a sump pump that cycles when it has not rained
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a suspected dishwasher leak
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a washing-machine drain that overflows
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: an intermittent leak around or below a toilet
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: attic moisture where soffit ventilation may be blocked
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: bubbling paint on an exterior wall indoors
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: condensation around an air-supply register
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: crawlspace condensation in warm weather
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: dark roof-deck areas that worsen in winter
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: frost concentrated around an attic hatch
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: one localized patch of wet attic insulation
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: sewage odor from a rarely used drain
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: small attic drips beneath frosted roof nails
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: water around a bathroom exhaust duct
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: water at a window corner during wind-driven rain
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Tracking crack endpoints, width and adjacent function
A safe, repeatable workflow for documenting crack geometry is a movement record, not a verdict before opening or repairing the assembly.
Building a repeatable drying record after a moisture event
A safe, repeatable workflow for documenting drying is a gradient through layers, not one surface number before opening or repairing the assembly.
Checking indoor humidity patterns in the attic
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Checking indoor humidity patterns in the basement
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Checking indoor humidity patterns in the bathroom
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Checking indoor humidity patterns in the bedroom
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Checking indoor humidity patterns in the crawl space
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Checking indoor humidity patterns in the exterior wall
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Checking indoor humidity patterns in the kitchen
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Checking indoor humidity patterns in the laundry room
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Checking indoor humidity patterns in the roof
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Checking indoor humidity patterns in the window
Log humidity and temperature through occupancy and weather changes. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Comparing condensation with leakage in the attic
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Comparing condensation with leakage in the basement
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Comparing condensation with leakage in the bathroom
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Comparing condensation with leakage in the bedroom
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Comparing condensation with leakage in the crawl space
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Comparing condensation with leakage in the exterior wall
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Comparing condensation with leakage in the kitchen
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Comparing condensation with leakage in the laundry room
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Comparing condensation with leakage in the roof
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Comparing condensation with leakage in the window
Use temperature and trigger timing to separate two moisture mechanisms. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Documenting a water stain in the attic
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Documenting a water stain in the basement
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Documenting a water stain in the bathroom
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Documenting a water stain in the bedroom
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Documenting a water stain in the crawl space
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Documenting a water stain in the exterior wall
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Documenting a water stain in the kitchen
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Documenting a water stain in the laundry room
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Documenting a water stain in the roof
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Documenting a water stain in the window
Create a useful record of location, edge, timing and triggers before repainting. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Investigating rain-linked symptoms in the attic
Relate wind, intensity and delay to the building geometry. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Investigating rain-linked symptoms in the basement
Relate wind, intensity and delay to the building geometry. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Investigating rain-linked symptoms in the bathroom
Relate wind, intensity and delay to the building geometry. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Investigating rain-linked symptoms in the bedroom
Relate wind, intensity and delay to the building geometry. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Investigating rain-linked symptoms in the crawl space
Relate wind, intensity and delay to the building geometry. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Investigating rain-linked symptoms in the exterior wall
Relate wind, intensity and delay to the building geometry. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Investigating rain-linked symptoms in the kitchen
Relate wind, intensity and delay to the building geometry. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Investigating rain-linked symptoms in the laundry room
Relate wind, intensity and delay to the building geometry. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Investigating rain-linked symptoms in the roof
Relate wind, intensity and delay to the building geometry. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Investigating rain-linked symptoms in the window
Relate wind, intensity and delay to the building geometry. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Isolating shower spray, drain and supply-water pathways
A safe, repeatable workflow for documenting tile is a finish, not the waterproofing layer before opening or repairing the assembly.
Logging seasonal crawlspace moisture without chasing one reading
A safe, repeatable workflow for documenting why crawlspace moisture can peak in warm weather before opening or repairing the assembly.
Mapping a musty odor in the attic
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Mapping a musty odor in the basement
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Mapping a musty odor in the bathroom
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Mapping a musty odor in the bedroom
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Mapping a musty odor in the crawl space
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Mapping a musty odor in the exterior wall
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Mapping a musty odor in the kitchen
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Mapping a musty odor in the laundry room
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Mapping a musty odor in the roof
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Mapping a musty odor in the window
Use room boundaries, airflow and timing to narrow an odor pathway. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Mapping attic frost before thaw erases the evidence
A safe, repeatable workflow for documenting how one ceiling bypass creates a broad attic frost field before opening or repairing the assembly.
Mapping efflorescence height, weather and drying direction
A safe, repeatable workflow for documenting white crystals show where water exited, not where it entered before opening or repairing the assembly.
Preparing a professional handoff in the attic
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Preparing a professional handoff in the basement
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Preparing a professional handoff in the bathroom
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Preparing a professional handoff in the bedroom
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Preparing a professional handoff in the crawl space
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Preparing a professional handoff in the exterior wall
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Preparing a professional handoff in the kitchen
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Preparing a professional handoff in the laundry room
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Preparing a professional handoff in the roof
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Preparing a professional handoff in the window
Turn observations into a concise timeline with evidence and unanswered questions. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Reading window leaks from first wet edge to sill drainage
A safe, repeatable workflow for documenting why window sealant is not a drainage system before opening or repairing the assembly.
Self-help workflow: a bathroom that stays humid long after use
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a cold stripe on an exterior wall
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a crack along the ceiling-wall joint
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a floor squeak that changes with the season
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a musty attic odor strongest in warm weather
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a musty basement odor during humid weather
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: a radiator that is cold at the top
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: condensation on the room side of windows
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: cooking odor that spreads through the house
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: dark dust stripes on a ceiling or wall
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: fogging between insulated glass panes
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: high bedroom carbon-dioxide readings overnight
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: low water pressure at one fixture
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: one damp-looking patch on a concrete slab
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: paint blistering on a basement wall
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: pipes that click as hot water starts or stops
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Self-help workflow: white powder on a basement wall after storms
A safe, repeatable homeowner workflow for documenting the clue, comparing triggers and deciding when to stop and involve a professional.
Separating a cold line from moving outdoor air
A safe, repeatable workflow for documenting thermal bridge or air leak: read the difference before opening or repairing the assembly.
Tracing a drain symptom across fixtures and vent paths
A safe, repeatable workflow for documenting what gurgling drains reveal about air and water pressure before opening or repairing the assembly.
Tracing roof water by timing, slope and hidden travel
A safe, repeatable workflow for documenting why roof leaks appear away from the defect before opening or repairing the assembly.
Tracking a crack over time in the attic
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Tracking a crack over time in the basement
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Tracking a crack over time in the bathroom
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Tracking a crack over time in the bedroom
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Tracking a crack over time in the crawl space
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Tracking a crack over time in the exterior wall
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Tracking a crack over time in the kitchen
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Tracking a crack over time in the laundry room
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Tracking a crack over time in the roof
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Tracking a crack over time in the window
Use consistent scale, angle and dates to distinguish stable from changing movement. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
Using doors, fans and weather to map odor transfer
A safe, repeatable workflow for documenting odor location can be an airflow illusion before opening or repairing the assembly.
Verifying a repair in the attic
Test the original trigger and record whether the symptom returns. This guide adapts the method to roof deck, insulation, ducts and ceiling penetrations.
Verifying a repair in the basement
Test the original trigger and record whether the symptom returns. This guide adapts the method to below-grade walls, floor edges, drains and stored materials.
Verifying a repair in the bathroom
Test the original trigger and record whether the symptom returns. This guide adapts the method to showers, drains, seals, extract ventilation and wet-room layers.
Verifying a repair in the bedroom
Test the original trigger and record whether the symptom returns. This guide adapts the method to overnight occupancy, closed doors, cold corners and windows.
Verifying a repair in the crawl space
Test the original trigger and record whether the symptom returns. This guide adapts the method to ground cover, joists, vents, ducts and foundation walls.
Verifying a repair in the exterior wall
Test the original trigger and record whether the symptom returns. This guide adapts the method to cladding, drainage plane, insulation and interior finish.
Verifying a repair in the kitchen
Test the original trigger and record whether the symptom returns. This guide adapts the method to sinks, appliances, cooking moisture and concealed connections.
Verifying a repair in the laundry room
Test the original trigger and record whether the symptom returns. This guide adapts the method to washer connections, dryer exhaust, drains and humidity.
Verifying a repair in the roof
Test the original trigger and record whether the symptom returns. This guide adapts the method to coverings, flashings, penetrations, drainage and wind exposure.
Verifying a repair in the window
Test the original trigger and record whether the symptom returns. This guide adapts the method to glass, frame, seals, flashing, sill and surrounding wall.
