aerial-drone-01
Drone roof inspection report
Tillerman Logistics distribution centre, Ridgeway Industrial Estate
ClientTillerman Logistics Ltd
SiteTillerman Logistics, Unit 3 Ridgeway Industrial Estate, Kiln Lane, Marlbury
ReferenceRK-2026-0433
Survey date26 Mar 2026
Remote pilotMarcus Feld
Prepared byMarcus Feld
Red: 4Amber: 4Green: 1

Sample report

Drone roof inspection reportRK-2026-0433

Document control

Status code: S2

RevisionDateStatusDescriptionAuthorCheckedApproved
P0128 Mar 2026DraftDraft for internal checkMFEW
A31 Mar 2026IssuedFirst issue to clientMFEWEW

Distribution

NameOrganisationCopies
Tillerman Logistics LtdTillerman Logistics Ltd1

This report has been prepared for the client named on the cover and may not be relied upon by any other party without the written agreement of Report Kit 360. The issue table above records every revision; the latest row is the current issue.

Drone roof inspection reportRK-2026-0433

1 Executive summary

The roofs of the 9,400 m² distribution centre were surveyed by drone on 26 March 2026. The main warehouse roof (built-up metal with GRP roof-lights) is in fair condition for its 14 years; the office block's flat roof shows persistent ponding. 23 items were recorded: 3 red, 11 amber and 9 green. The red items are a displaced ridge capping at gridline 7 (risk of water ingress and wind damage), a blocked valley gutter outlet above the loading bay and a cracked roof-light sheet that is fragile. These should be dealt with within one month; the amber items can be programmed into the next maintenance window.

Red: 4Amber: 4Green: 1Highlight: 0
Drone roof inspection reportRK-2026-0433

2 Site and asset details

Site

Site addressTillerman Logistics, Unit 3 Ridgeway Industrial Estate, Kiln Lane, MarlburyPostcodeMB8 2VK
Asset surveyedMain warehouse roof, office block flat roof and loading canopyAsset type / constructionBuilt-up metal roof with GRP roof-lights; single-ply membrane flat roof
Approximate area or extent9,400 m²Client contactGareth Pell
aerial-drone-01

Figure 2.1 — Site location / overview

Drone roof inspection reportRK-2026-0433

3 Methodology

Flight and capture

Aircraft (make / model)DJI Mavic 3 EnterpriseSensor(s)20 MP 4/3 CMOS, 24 mm equivalent
Ground sample distance (cm/px)1.4Flight altitude (m AGL)45
Image overlap (front / side)80% / 70%Ground control pointsRTK positioning; 4 check points
Coordinate reference systemOSGB36 / British National Grid (EPSG:27700)Survey date and time26 Mar 2026
WeatherDry, 7 °C, wind 4 m/s westerly, visibility over 10 km

The survey was flown as a series of planned and manual flights to capture oblique and nadir imagery of the asset. Images were reviewed by the surveyor named on the cover; observations were rated using the scheme printed in this report.

Flights were flown as planned. Imagery was processed in Pix4Dmatic 1.60 to produce a 1.4 cm/px orthomosaic and a digital surface model; the point cloud and 3D model are supplied with the raw imagery. No thermal capture was made on this visit.

Imagery captured by unmanned aircraft shows the external surfaces visible from the air at the time of the flight. It cannot confirm the structural capacity of any element, the composition of materials, the condition of concealed layers or substrates, or whether an area can be accessed safely for works. Where an area was not captured (for example because of weather, airspace limits, obstructions or glare) this is stated in the coverage section.

Drone roof inspection reportRK-2026-0433

4 Compliance evidence

Operator and authorisation

Operator IDGBR-OP-EXAMPLE1234Operational authorisation / GVC referenceOA-EX-2041 (GVC)
Remote pilot nameMarcus FeldFlyer IDFLY-EX-204871
Insurance (policy / expiry)Policy EX-UAS-77812, expires 2026-11-30Site-specific risk assessment referenceRA-TL-2026-03
Airspace / NOTAM checkChecked on NATS drone assist; no NOTAMsLandowner / occupier permissionWritten permission from Tillerman Logistics Ltd

Table 4.1 — Flight log (retain for at least three years)

DateTake-off / landingStartDurationDay / nightAircraft make / model / serialRemote pilotOccurrences
2026-03-26Yard, north-west corner09:4018 minDayDJI Mavic 3 EnterpriseMarcus FeldNone

Pre-flight checks

ItemResultNote
Weather within limits✔ Pass
Airspace and NOTAMs checked✔ Pass
Site risk assessment reviewed✔ Pass
Aircraft pre-flight inspection completed✔ Pass
Batteries and firmware checked✔ Pass
Emergency procedures briefed✔ Pass
Drone roof inspection reportRK-2026-0433

5 Extent of coverage

All roof areas were captured at nadir and at 45° obliques. The 3 m strip along the eastern boundary was flown at reduced height because of the adjacent overhead line; the gutter detail there is from obliques only. No areas were excluded.

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Figure 5.1 — Coverage plan

Drone roof inspection reportRK-2026-0433

Rating guide

Observations are rated Red (critical — immediate action), Amber (monitor — scheduled maintenance) or Green (baseline maintenance).

ColourRatingMeaning
RedSerious defect requiring urgent attention: a critical safety, structural or compliance risk. Immediate repair or specialist investigation is needed.
AmberDefect requiring attention; plan remedial works. Not immediately dangerous but likely to worsen if left. Schedule and monitor.
GreenMinor observation; no immediate action. Low risk with no current impact; address within routine maintenance cycles.
Highlight
Counted separately
Non-RAG highlight, counted separately: advisory notes, best-practice recommendations and enhancement opportunities rather than defects.
Drone roof inspection reportRK-2026-0433

6 Defect register

RefElementLocationCondition / descriptionRatingPhotoMeasurementRecommended actionTimescale
1Ridge cappingGridline 7, main roofCapping displaced 300 mm; fixings missing.Red
Refix with new stitching screws; check adjacent cappingsWithin 1 month
2Valley gutter outletAbove loading bayOutlet blocked with debris; water standing 60 mm deep.Red
Clear and fit leaf guardsWithin 1 month
3Roof-lightBay 12Outer GRP sheet cracked; fragile.Red
Replace; fit fragile-roof signageWithin 1 month
4Sheet cut edgesEaves, south slopeCut-edge corrosion along about 40 m of eaves.AmberPrepare and treat with a cut-edge coatingNext maintenance window
5Flat roofOffice blockPonding over about 30% of the area; membrane sound.AmberMonitor; consider additional outlets12 months
6Gutter jointsNorth eaves gutterThree joints weeping; staining on the cladding below.AmberReseal the jointsNext maintenance window
7CanopyLoading canopyLight moss growth; otherwise sound.GreenClean at the next maintenance visitRoutine

Measurements are taken from the photogrammetric model where stated and are approximate.

Drone roof inspection reportRK-2026-0433

7 Photograph

Photograph 1 — Ridge capping at gridline 7 (Main roof)

#1#2
#RatingDetailFault typeTags
#1Red
Displaced cappingWind damage Fixings issue

Defect: ridge capping displaced about 300 mm with missing fixings. Risk: water ingress and further wind damage; the loose capping could fall. Recommendation: refix with new stitching screws and check the remaining cappings within one month.

#2Amber
Cut-edge corrosionCut end corrosion

Edge corrosion to the adjacent sheet; treat with a cut-edge coating in the next maintenance window.

Drone roof inspection reportRK-2026-0433

8 Recommendations

1. Refix the ridge capping at gridline 7 and check the remaining cappings (roofing contractor, within one month). 2. Clear the valley gutter outlets and fit leaf guards (within one month). 3. Replace the cracked roof-light and fit fragile-roof signage at the access ladder (within one month). 4. Programme the amber items (sealant renewal, cut-edge corrosion treatment, gutter joint repairs) for the summer maintenance window. 5. Re-survey in 24 months or after any storm event.

The findings describe the condition observed on the inspection date. Buildings and assets change with time, weather and use; if a decision is to be made more than three months after the inspection date we recommend that the relevant areas are re-inspected.

Drone roof inspection reportRK-2026-0433

Appendix A — Raw data manifest

DeliverableFormatFiles / sizeLocation / link
Raw imageryJPEG612Project share, folder 01_raw
OrthomosaicGeoTIFF1Folder 02_ortho
Point cloudLAS / LAZ1Folder 03_cloud
3D modelOBJ1Folder 04_model
Flight logsCSV3Folder 05_logs
Drone roof inspection reportRK-2026-0433

Appendix B — Weather record

Conditions at time of flight

Wind speed / gusts4 m/s, gusts 6 m/sDirectionWest
PrecipitationNoneVisibilityOver 10 km
Temperature7 °CSourceMet Office observation, Marlbury, 09:00
Drone roof inspection reportRK-2026-0433

Declaration

I confirm the flights were conducted in accordance with the operator's operations manual and the authorisations stated, and that the observations represent my professional opinion of the condition visible at the time.

Prepared by

Marcus Feld
GVC, A2 CofC, BSc (Hons)

Report Kit 360

Date: 31 Mar 2026

Checked by

Eleanor Whitcombe
BSc (Hons) MRICS

Report Kit 360

Date: 31 Mar 2026