Gutter and roof valley inspections: a practical maintenance guide

Give each part of the system its own location

A roof valley is the channel between meeting roof slopes. An eaves gutter collects water at the roof edge. Outlets, hoppers and downpipes carry it onward. Calling all of these “the gutters” makes it difficult to know what a clearance visit or inspection actually covered.

Label each important route on an overview and connect the label to detail photographs. On a building with several wings, identify which outlet serves which roof area. Use the same labels when obtaining quotations and recording completed work.

Record observations without overstating them

Useful observations include accumulated debris, a visibly displaced component, surface weathering and reported overflow. Describe their position and extent. Debris at a valley head does not by itself establish complete blockage; a dry-weather photograph does not demonstrate how the system behaves in rain.

SPAB describes how poor rainwater disposal can affect walls and concealed timber, and recommends regular clearance and checks for defects. Its guidance also notes that leaf guards do not remove the need for maintenance.

Reference: SPAB: rainwater fittings

Choose the timing around the property

For an estate with mature trees, plan a review around leaf fall and another condition review after the harsher weather season. Treat this as a starting schedule. Repeated debris, exposed locations or a known drainage concern may justify additional visits.

Keep a simple record of what is found at each visit. If one valley repeatedly accumulates material while the others remain clear, the maintenance plan should reflect that difference. A single interval for every building can hide where attention is most useful.

Specify more than “clean the gutters”

Ask the contractor to identify the sections included, the access arrangement and any exclusions. State whether the task includes accessible outlets and checks beneath guards, and whether downstream drainage needs a separate assessment. This makes quotations easier to compare.

After clearance, request photographs of the same locations and a note of any defects discovered. If performance remains uncertain, agree appropriate testing with the contractor rather than assuming that removing visible leaves has resolved the whole concern.

• List the exact valleys, gutters and outlets in the work order.
• Separate clearance from investigation and repair.
• Record any sections that could not be reached.
• Set a follow-up date for recurring concerns.

Keep observation and access separate

Owners can provide useful information from safe ground-level positions, particularly when an overflow is visible during rain. Record the location and timing without climbing onto roofs or using improvised access. High-level work needs suitable planning and equipment.

Where water is actively entering the building or components appear unstable, seek prompt professional assessment. Routine imagery is one part of the evidence; it should not delay addressing an immediate concern.

Close the loop in the maintenance record

An effective record links the original observation, the contractor’s findings and the completed action. Mark an item as verified only when the agreed check has been completed, and retain any remaining uncertainty. This distinction is especially useful when responsibility passes between property managers.

At the next inspection, compare the same locations. The question is not simply whether the gutter looks cleaner, but whether the recurring issue has been investigated and the maintenance approach is working for that particular roof.