What does a roof inspection cover?
The inspection covers the roof covering, flashing, gutters and edges, ventilation, the attic and the decking, and it is written up section by section. Nothing is taken apart unless it has to be.
From the ground, the technician checks the eave line, the fascia, the gutters, the drip edge and any visible sag in the roof plane. From the roof surface, the covering is checked for lifted, cracked or missing shingles, granule loss, curling, and the condition of nails and fasteners. The flashing at each joint is checked as described on the flashing repair page.
How is the remaining life of a roof judged?
Remaining life is judged from the condition of the roof itself, not from a calendar date. Granule loss, curling, nail condition and the state of the decking are the main evidence.
Asphalt shingles lose granules as they age, and the loss shows as bare patches and grit in the gutters. Curling and cupping show that the covering no longer lies flat. A technician looks at how many shingles are affected and whether the damage is spread across the roof or confined to one slope, since a single slope tells a different story from the whole roof.
Repair or replacement: how is the choice made?
A repair is the right answer when the damage is local and the covering and deck are sound. Replacement is the better answer when the damage is widespread, the deck is failing or repairs would have to be repeated every season.
Local failure at a joint, a few lifted shingles or a single chimney is a repair. Where the damage runs across a whole slope, where the covering is curling over most of the roof, or where the granules are gone across the field, repair becomes a series of patches that keep the roof in place without fixing it. The report says which case applies and why.
What affects the cost of an inspection and any work that follows?
The inspection depends on the size of the roof, its pitch and height, the number of roof planes and access to the attic. Any work that follows depends on the findings. The price is explained and approved before work starts.
A simple gable with one roof plane takes less time to inspect than a three-decker with rear sections, dormers, a flat area and several chimneys. Steepness and height add time and safety measures, and an attic crowded with stored items takes longer to read. The technician explains the likely scope before the visit.
What should a homeowner gather before the inspection?
Gather the history: when the roof was last worked on, any leaks and when they occurred, and any previous report. Clear access to the attic so the technician can read the decking.
Write down the age of the house as far as you know it, any repair or replacement records, and the dates of leaks or ice dams. A previous roof permit, if there was one, tells the technician what covering may be underneath. Note any insurance claim made for the roof, because that history matters for how the findings are described.
Keep the attic accessible, with stored items moved away from the hatch. Turn on the light and note any hatch that is hard to open. Do not climb onto the roof for your own inspection. The view from the ground and the attic is enough to plan a visit, and the technician does the roof surface.