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Dry rot inspection checklist

A visual inspection for dry rot, wet rot and wood-boring insects. Record why the inspection was done, the moisture sources seen and the meter used. Then add each room or area: the timbers checked, the signs seen, the meter reading, the suspected cause to be confirmed by a specialist, the access and photos. Dry rot suspected shows a red warning that it can spread through masonry, and suspected woodworm explains how to read signs of activity. Record the limits of the inspection and a recommendation. An optional Walk Cam route films the room and moisture source, the joinery, the floor void through an existing opening and any exit holes. Every question is listed below, and you can fill the live form in on this page.

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What are the signs of dry rot?

The Property Care Association says timber with dry rot may darken and shrink, developing square cracks, and in still, humid conditions it can produce a cotton wool-like growth on the surface. Dry rot can grow through masonry and very small cracks, away from the timber it is feeding on. It can only grow because the wood is wet, so the moisture source is found first. Where dry rot is suspected, the PCA says a specialist should survey the property, and opening up is often needed.

Last updated . Facts checked by the SiteSurvey team on 17 October 2026 against Property Care Association: dry rot advice for homeowners, Property Care Association: wet rot advice for homeowners and Property Care Association: woodworm advice for homeowners.

Try the dry rot inspection form live

Answer a few questions and watch it adapt. Your answers are not saved, and any photos you add are deleted within the hour.

Live form: Dry Rot and Timber Decay InspectionOpen full screen ↗
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Open the completed example to see fictional readings, notes, photos and calculations. Choose Blank form to try entering your own answers.

Want to see one filled in? See a completed dry rot inspection report (PDF), made by SiteSurvey from a fictional site visit.

Walk Cam route · four guided clips

Record the dry rot inspection on video

Find the moisture first, then film the timber around it: skirting, joinery, the floor void and any woodworm holes.

Record the property, room, date and what was opened. Start with the likely source of damp, then show affected timber without lifting boards or cutting into anything for the camera. The four AI-generated clips illustrate one route, not a real property.

See the footage in a report

A fictional six-page example with the four points, twelve stills from the clips, observations, follow-up actions and the limits of a visual record.

View the visual evidence (PDF) ↗ · Download the full sample report

Visual evidence page from the dry rot and timber decay inspection visual route sample report, with footage stills and observations

Video records visible signs. It cannot identify dry rot, wet rot or woodworm species, measure moisture content or show how far decay has spread; that needs a specialist survey. Example footage was generated in Google Flow and the observations are scripted; no real site is shown. Walk Cam works inside any form in the app. How Walk Cam works · All visual inspections

Every question in the dry rot inspection template

A dry rot and timber decay inspection: moisture sources, each room or area with the timbers checked, signs of rot or wood-boring insects, meter readings, access limits, photos, and whether a specialist survey is needed. 3 sections and 45 questions. Follow-up questions and guidance appear only when an answer calls for them, so the person on site never sees the ones that do not apply.

Make it your own: every question is editable

This is a starting point, not a fixed form. Once it is in your SiteSurvey account you can reword any question, add or remove questions, sections and answer options, and add your own logo, so it fits the way your team works and the jobs you do.

Details you only enter once

Add this form to a project in SiteSurvey and it fills in what the project already knows, so nobody on site retypes it and every form on the job uses the same names. Anything filled in can still be changed.

  • Project: the project name
  • Client: the project's customer
  • Site: the site, when the form is opened for a space or a product
  • Site address: the site address, from the space or the project

Property

  • ProjectShort answer
    Fills in from the project name
  • ClientShort answer
    Fills in from the project's customer
  • Site*Short answer
    Fills in from the site, when the form is opened for a space or a product
  • Site addressShort answer
    Fills in from the site address, from the space or the project
  • Inspection date*Date
  • TimeTime
  • Surveyor*Short answer
  • Reason for the inspectionChoose one
    • Suspected decay reported
    • Follow-up from a survey
    • Damp investigation
    • Routine check
  • Moisture sources seenTick all that apply
    • Roof or gutter leak
    • Plumbing leak
    • Penetrating damp
    • Damp at low level on walls
    • Blocked or missing ventilation
    • Condensation
    • None seen
  • Moisture meter usedShort answer
  • Timber reading you treat as wet enough for decayNumber

    On the meter's timber scale. Many surveyors use about 20%: timber kept below about 20% moisture content is generally too dry for fungal decay. Enter the figure you work to; readings at or above it are flagged.

  • GuidanceProperty Care Association: dry rot can only grow because the wood is wet, and wet rots affect timber kept excessively wet, often joist or beam ends and posts where they meet wet walls or the ground. Leaks, rising and penetrating damp, poor ventilation and poor weather protection all lead to wet rot. Find and record the moisture source first.
  • Weather captureAnswer

    Record estimated current conditions and add what you observe on site.

Rooms and timbers

  • Rooms and areas
    Repeat for each area. Each one asks:
    • Room or area*Short answer
    • Timbers checkedTick all that apply
      • Skirting
      • Floorboards
      • Floor joists
      • Door or window linings
      • Roof timbers
      • Wall plates or lintels
      • Stairs
      • Other
    • Signs seenTick all that apply
      • Darkened timber
      • Cracking into squares
      • Shrinking or distortion
      • Soft or crumbling timber
      • Cotton wool-like growth
      • Strands on masonry
      • Fruiting body
      • Small round exit holes
      • Fresh bore dust (frass)
      • Musty smell
      • None seen
    • Moisture meter reading on the timber (as displayed)Number
    • Against the thresholdWorked out by the form
      Shown when “Moisture meter reading on the timber (as displayed)” is answered and “Timber reading you treat as wet enough for decay” is answered
    • WetWorked out by the form
    • Suspected cause (to be confirmed by a specialist)Choose one
      • Dry rot suspected
      • Wet rot suspected
      • Wood-boring insects suspected
      • No decay seen
      • Not sure
    • WarningProperty Care Association: dry rot can grow through masonry and through very small cracks, away from the timber it is feeding on. Check timbers beyond this area, including in the next room, and get a detailed survey by a specialist.
      Shown when “Suspected cause (to be confirmed by a specialist)” is “Dry rot suspected”
    • CheckProperty Care Association: the common furniture beetle leaves small round exit holes about 1 to 2 mm across. Bore dust (frass) around holes can suggest activity but can be misleading, so a qualified professional should confirm whether it is active before any treatment.
      Shown when “Suspected cause (to be confirmed by a specialist)” is “Wood-boring insects suspected”
    • AccessChoose one
      • Seen in full
      • Seen through an existing opening
      • Not accessible
    • Length of the affected timber or area (m)Number

      The extent you can see, for example along a skirting or across a floor. Measure from a photo with a door or a rule in the same plane, or use a tape. Measuring from a photo gives an estimate. Hidden decay often runs further.

      Shown only when the answers above make it relevant
    • Height or width of the affected area (m)Number
      Shown only when the answers above make it relevant
    • Visible affected area (m²)Worked out by the form
      Shown only when the answers above make it relevant
    • PhotosPhotos
  • Rooms and areas inspectedWorked out by the form
  • Readings at or above the thresholdWorked out by the form
    Shown when “Timber reading you treat as wet enough for decay” is answered
  • Areas with dry rot suspectedWorked out by the form
  • Wet rot suspectedWorked out by the form
  • Insects suspectedWorked out by the form
  • Highest timber readingWorked out by the form
  • Visible affected area, total (m²)Worked out by the form
  • CheckTimber at or above your threshold. Find and fix the moisture source first, then recheck the readings once the timber has had time to dry.
    Shown only when the answers above make it relevant
  • GuidanceDo not name the fungus or insect from a photo or video alone. Record what you see; identification is for a specialist.
  • Limits of the inspection (floors not lifted, linings not removed, furniture)Notes
  • Walk Cam: dry rot and timber decay inspectionWalk Cam video with voice-to-text

    Optional. Film the four guided points on the SiteSurvey app; each clip keeps its spoken note.

Actions and sign-off

  • Recommendation*Choose one
    • Specialist timber survey needed
    • Fix the moisture source and recheck
    • No decay seen
  • CheckProperty Care Association: where dry rot is suspected, the property should have a detailed survey by a specialist to find the cause of the water and the full extent of the damage, and opening up is often needed.
    Shown when “Recommendation” is “Specialist timber survey needed”
  • Recheck dueDate

    Set when the moisture source is fixed. Timber needs time to dry before a recheck means anything.

    Shown only when the answers above make it relevant
  • Days to the recheckWorked out by the form
    Shown only when the answers above make it relevant
  • Are further actions needed?Yes or No
  • Further actions
    Repeat for each action. Each one asks:
    Shown when “Are further actions needed?” is Yes
    • What needs doing?*Notes
    • PriorityChoose one
      • Urgent
      • High
      • Medium
      • Low
    • Who will do it?Short answer
    • Due dateDate
    • StatusChoose one
      • Open
      • In progress
      • Completed
  • Inspector name*Short answer
  • Position or companyShort answer
  • Inspector signatureSignature
  • CheckSigning records what was found on the day. It does not make unsafe equipment safe or replace a thorough examination, design check or service by a competent person.

Scope and responsibility

This is a visual inspection record, not a specialist timber survey, a species identification or a treatment specification.

What a useful entry looks like

Signs seen and suspected cause

Describe the signs and the moisture source; leave identification of the fungus or insect to a specialist. Say what could not be seen.

Front room skirting darkened with square cracking and a musty smell, gutter leak above. Dry rot suspected; specialist timber survey booked.

Fictional example of record wording. Use the actual evidence and approved arrangements for your job; this is not a completed report or an instruction to carry out the work.

See it filled in

A completed dry rot inspection report, made by SiteSurvey from a fictional site visit: every answer, the photos, the guidance that applied and the sign-off, ready to send as a PDF.

See completed form (PDF) ↗

Dry rot inspection FAQs

What is the difference between dry rot and wet rot?

The Property Care Association says wet rot usually stays where the timber is in contact with excessive water, often joist or beam ends and posts at wet walls or the ground. Dry rot can spread away from the wet timber, through masonry and small cracks, to find new timber.

Can you identify dry rot from a photo or video?

No. The form records what you see and a suspected cause to be confirmed by a specialist. Identifying the fungus or insect needs a specialist inspection, and the PCA says opening up is often required to find the extent.

How do I know if woodworm is active?

The PCA says the common furniture beetle leaves small round exit holes about 1 to 2 mm across, and small piles of bore dust (frass) can suggest activity, though this can be misleading. A qualified professional should establish whether it is active or historic before any treatment.

What causes timber decay?

Moisture. The PCA lists leaking pipes, rising and penetrating damp, poor ventilation and poor weather protection as causes of wet rot. The form records the moisture sources first, then each room.

Do I need to lift floorboards?

Not for this inspection. Use existing hatches or openings, record what could not be seen in the limits of the inspection, and recommend a specialist survey where opening up is needed.

Who uses this?

Housing associations and councils, surveyors, letting agents, damp and timber contractors and property managers.

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