Define a large-roof survey by named zones, questions and deliverables. “Survey the whole roof” is rarely precise enough: parapets, valleys, gutters, plant screens, adjoining roofs and internal voids may need different access, and some will remain unseen.
Divide the roof into traceable areas
Start with an elevation drawing, plan or recent overview photograph. Give each slope, courtyard edge, plant zone and roof level a simple label. Mark reported noise, bird activity, damaged material or possible entry points without converting them into a diagnosis.
List features that matter to the enquiry: coverings, eaves, parapets, service penetrations, vents, gutters, roof lights, cable routes and interfaces with neighbouring property. Add internal areas where signs have been reported. The surveyor can then connect external views with rooms or voids without assuming that two vertically aligned points form one route.
A usable brief says what the client needs back. Ask for overview images before close-ups, location labels, the access method, visible findings, areas not seen and referrals outside pest competence. A close photograph of a lifted edge is of limited value if nobody can tell which elevation it belongs to.
Choose access for each question
Ground observation may show broad activity but miss hidden gutters. Direct access may give detail but require specialist equipment and safe surfaces. A platform may suit one façade but not a rear courtyard. Ask the provider to propose access by zone and state the limits.
If a drone is proposed, do not treat it as a camera that can fly anywhere. Current CAA guidance varies by aircraft and operating category and covers height, distance from people, crowds, restricted airspace, visibility, IDs, privacy and take-off permission. The operator is responsible for assessing the actual flight and weather. A drone may improve visible coverage; it cannot see through materials.
Consider a school-sized roof with three levels and screened plant. One image of the main slope cannot stand for rear valleys or spaces behind screens. The report should colour the plan by viewed, partly viewed and not viewed areas. That allows a second access method to be commissioned only where it adds value.
Keep pest and building findings distinct
A pest-focused survey can record openings, fouling, nesting material or movement. Loose coverings, corrosion, staining or structural movement require a roofer, surveyor or engineer. Put them in separate columns and coordinate referrals where the timing of repair depends on wildlife activity.
Weather and occupancy can change the appointment. Agree what conditions trigger postponement and how people below are managed. Privacy should be planned before capturing windows, balconies or neighbouring land.
Call The City Pest Company on 0203 393 2338 with the roof zones, concern and access information. Confirm the actual survey capability and deliverables for the site via the roof surveys page.
FAQs
Does “full roof survey” mean every surface will be seen?
No. Ask for a coverage plan and explicit exclusions.
Is a drone always the best option?
No. It depends on the question, site, aircraft, people, airspace, permissions, weather and required detail.
Can the pest report certify roof condition?
Only if the provider is separately competent and appointed for that work. Otherwise structural and weatherproofing questions need referral.
Sources and further reading
External references may contain pest or skin photographs.
