If such a section is covered in EPDM, GreenSpec's expected service life for the material is 20 to 30 years. Less, in March 2026, quoted 25 to 40 years for GRP and 10 to 20 years for felt. A flat roof that has passed those ages is worth a closer look than the slopes beside it.
What do we check at the eaves?
Under the overhang, the soffit is a panel that lines it from below, and the fascia is the front board that carries the gutter. When either rots, water can reach the rafter ends. We look at the boards, the gutter fixings and the level of each run, and at where the felt drapes toward the gutter, because a torn lap sends water behind the fascia. A clear photograph of that line, taken from the ladder, is often more convincing than a paragraph of description.
Houses on an estate like this may have gained extensions over the years. Each addition brings a roof of its own, and the seam where old meets new, bridged by a flashing, deserves a careful look.
Estate roofs are rarely identical, and neither are their owners' worries. A short note from you about what you have noticed, such as a stain, a draught or a gutter that spills during a downpour, points us at the right spot before we climb.