F4
Roof Survey Report
Ref F4D-2026-0096 · Domestic slate roof
Sample report — illustrative only · not a survey of a real property

8 Sample Avenue, Morpeth

Northumberland · detached house · natural slate covering with lead valleys
Survey date
9 April 2026
Method
Drone, external visual
Conditions
Dry, sunny, calm
Inspected by
Dave Brown · GVC
A
GREEN
Overall condition

In good order — one thing to keep an eye on

A well-kept roof. The slate covering is sound and even, the ridge is true, the chimney flashing is properly dressed and the lead valleys are clean and running. Nothing here needs doing today. The single item worth noting is a small patch of moss starting in the foot of one valley — five minutes' attention now keeps it from becoming a job later. We'd be comfortable telling a buyer this roof has been looked after.

Figure 1 — Overhead pass, main slopes, valleys & chimney (markers keyed to findings below)
Overhead drone photograph of a well-maintained grey slate pitched roof with clean lead-lined valleys, sound ridge, an intact chimney with dressed lead flashing, and one small patch of moss in the foot of a valley 1 2 3 4 5
Red — act now Amber — plan / monitor Green — serviceable

Findings

Five items recorded. Four are in good order and noted as a record of condition; one is a minor maintenance item to keep on top of.

1

Ridge line — sound & true Green

LocationMain ridge PriorityServiceable

The ridge tiles are sitting true and evenly, with the bedding mortar intact and no lifting or gaps along the run. The ridge is the most wind-exposed line on a roof, so a sound ridge is a good sign the roof has been maintained.

Recommended: no action. Recorded as a benchmark of condition.

2

Chimney flashing — intact & well-dressed Green

LocationChimney stack base PriorityServiceable

The lead flashing and soakers around the stack are properly dressed and sitting tight to the brickwork, with no lifting or temporary repairs. This is the joint most roofs fail at first, so finding it in good order here is worth recording.

Recommended: no action. Re-check at the next survey.

3

Valleys — lead-lined & clear Green

LocationBoth valleys PriorityServiceable

The valleys are lead-lined, clean and running freely, with the slates cut neatly to them. Valleys carry the most water on a roof of this shape, so clear, sound valleys are exactly what you want to see.

Recommended: no action beyond keeping them clear — see finding 5.

4

Slate covering — sound & even Green

LocationBoth slopes PriorityServiceable

The slates are even and well-laid across both slopes, with no slipped, cracked or missing units visible from the air and only normal surface weathering for the roof's age. No delamination or widespread nail-sickness apparent.

Recommended: no action. Normal weathering only.

5

Moss — foot of the valley Amber

LocationValley, near the gutter PriorityKeep on top of it

A small patch of moss is establishing in the foot of one valley, near the gutter. It is harmless today, but moss in a valley traps debris and water over time and a valley is the one place you don't want water held up. This is the only item on the roof worth doing anything about.

Recommended: remove the moss by hand and keep the valley and gutter clear. A look once a year keeps a roof like this in this condition.

What we'd do, in order

  1. This year — clear the moss from the valley foot (5) and check the gutter below it runs free. A five-minute job.
  2. Ongoing — a quick annual look keeps the valleys, ridge and flashing in the condition they're in now. On a roof this well-kept, prevention is the whole game.
  3. For a sale — this report is the kind of record a buyer or their surveyor wants to see: dated, photographic evidence the roof has been looked after.

Scope & limitations

This is an external visual inspection carried out by drone. It records the visible condition of the roof covering, ridge, chimney, flashings, valleys and rainwater detail from the air on the date of survey. It is not a structural survey, a RICS Home Survey, or a guarantee of watertightness, and it does not assess anything not visible from above — roof timbers, the underlay, insulation, internal leaks, or anything beneath the covering. Findings and gradings are the surveyor's professional opinion from the imagery and are intended to give you a clear record of condition and help you prioritise any maintenance; they are not a quote for works. This sample uses illustrative imagery and does not relate to a real property.

Forged 40 Digital (F4D) is part of Forged 40 Group.
Drone roof surveys & virtual tours
North of England · Borders · Scotland
Call us · Dave@forged40.com · forged40.com
Call us