A repair is usually right when the roof is under roughly twelve to fifteen years old, the damage is localized to one area, and the rest of the roof is sound. Replacement starts to make sense when problems are widespread — granules filling the gutters, shingles curling or cracking across multiple slopes, repeated leaks in different spots, or an adjuster recommending replacement after a storm. Age matters because patching a roof that needs replacing in two years rarely pays off. If a contractor recommends replacement, ask them to show you photos of multiple slopes, not just the leak area, so you can judge the evidence yourself.

Most small to mid-size repairs — replacing blown-off shingles, fixing a section of flashing, sealing a single leak — are finished in a few hours to a single day once the pro is on site and the weather cooperates. Larger jobs, like a multi-slope storm repair or a partial re-roof, can run one to three days. A full replacement on an average home is typically one to three days depending on size, pitch, and material. Weather is the wildcard: roofers will not lay shingles in rain or high wind, so an active-leak emergency is often tarped first to stop the damage, then permanently repaired once conditions allow.

Most standard policies cover sudden, accidental damage — hail, wind, a fallen limb — but not wear, age, or poor maintenance. Whether to file depends on the cost versus your deductible: a small repair under your deductible is not worth a claim, while storm damage running into the thousands usually is. Many insurers have shifted to depreciated (actual-cash-value) settlements on older roofs, so read your policy. If you do file, documentation drives the outcome — photos of the damage, a written contractor scope, and ideally your roofer meeting the adjuster on site so the damage is assessed accurately rather than minimized.

Usually not for the exterior work itself — roofing happens on the outside of the house, and a reputable pro can complete most repairs and replacements without access to the interior. That said, it helps to be reachable by phone in case the crew finds hidden damage, such as rotted decking, that changes the scope and needs your sign-off before they proceed. If the leak has caused interior damage they need to inspect, or if equipment staging requires moving things in the yard or garage, you will want to coordinate that in advance. Confirm the plan and a contact number with your matched pro before the day of the work.

Ask whether they will physically get on the roof to diagnose the problem rather than estimate from the ground, and have them name the root cause, not just where the water appears. Ask the quote to specify the affected area, the exact materials, whether decking replacement is included if rot is found, and how they price that contingency. Confirm they carry liability and workers' compensation insurance, ask about the workmanship warranty, and be cautious of anyone demanding most of the payment up front. A pro confident in their diagnosis will welcome these questions and put the answers in writing rather than push you to decide on the spot.

Because they are often not quoting the same job. One pro may be pricing a surface patch while the other includes new underlayment, flashing, decking replacement, and proper ventilation — work that costs more now but prevents a repeat repair. Differences also come from material grade, whether permits and debris haul-off are included, warranty length, and the contractor's crew size and overhead. The fix is to compare line items, not bottom lines: ask both pros to itemize scope, materials, the decking contingency, and the warranty. Once the quotes describe the same work, a large remaining gap usually reflects quality and reliability you can weigh, not just price.

More urgent than it looks. A slow leak keeps the decking, insulation, and framing around it wet, and that constant moisture rots wood and grows mold quietly for weeks before it becomes obvious. By the time a ceiling stain spreads or you smell something musty, a cheap shingle-and-flashing fix can become a remediation project involving drywall and structural wood. The economics strongly favor acting early — a modest repair now routinely prevents a far larger water-damage job later. If you see a stain, a damp spot in the attic, or daylight through the roof boards, get it diagnosed promptly rather than waiting for the next storm.

Requirements vary by state and municipality, but at minimum a roofer should carry general liability insurance and, if they have employees, workers' compensation — ask to see proof of both, since uninsured roof work means an on-site injury or property-damage claim can land on you. Many states and cities also require a contractor's license or registration for roofing work above a certain value; check your local building department. A legitimate pro will readily provide their insurance certificate and license number, pull permits when the job requires them, and explain any local code upgrades — like drip edge or ice-and-water shield — that a replacement has to include.