Why do shingles fail sooner on the sunny side of the roof?
Sun and heat work on the south and west slopes for more hours of the day, so the asphalt dries out and the granules loosen there first.
The protective granules on a shingle can wash away or break loose when the asphalt underneath has softened and hardened through many summers. On the sunny side, that cycle repeats more often, and the tabs lose their flexibility sooner. The shaded slopes often hold their color and their seal for longer. A technician checks each slope rather than assuming the whole roof has aged at the same rate.
How can I tell if the shingles are still good enough to repair?
A repair works when the shingles bend without cracking and the surrounding roof still seals. Shingles that snap along a fold or stay stiff at the edges usually cannot be lifted and reset.
A technician lifts a shingle gently at the lower edge, checks whether it flexes, and looks for granule loss and curling. Repairs are judged against the rest of the roof as well, because a few good shingles next to a failing area make a poor match. If the roof is near the end of its useful life, a repair buys time but does not solve the problem, and the technician will say so.
Why do shingles lift after a storm?
Wind gets under the edges and the tabs, lifting them past the point where the sealant can hold them flat.
Straight-line wind is the usual cause in the county, because open farm land lets it reach a roof with nothing to slow it. Shingles that were already aging are the first to go, and the lifted tabs can crease as they are pushed back. A technician checks the creases, reseals the tabs and replaces any shingle that will no longer lie flat. Storm damage is covered in more detail on its own page.
What moves the price up or down on a shingle job?
The size of the area, the number of layers, the condition of the decking, the pitch, the access on the lot and the age of the building all move the price. No figure is given here, and the price is explained and approved before work starts.
A small shingle repair on a low roof with easy access costs far less than a full replacement on a steep, multi-layer roof. Soft decking adds carpentry, and chimneys, valleys and skylights add flashing detail. A rural lot can add time to haul material and set up safely. Older buildings may need extra care to avoid breaking brittle shingles, and that care has a cost. The price is explained before work begins.
Does color matter when shingles are replaced?
It can, because sun fades the shingles already on the roof, so a new patch often looks different from the old covering around it.
A technician shows the difference between the new and the old shingles before they are set, and says when a match is not possible. Matching is most realistic on a small area, and less so on a roof that has faded evenly. A homeowner who wants a uniform look is better off knowing that early, before a repair is made.