Roofing: repair, reroof, or tear off, and how to decide

Most roofing calls get made in a panic, after a stain appears on a ceiling or a storm peels back a corner. That is the worst moment to decide, because the pressure pushes you toward whoever can show up fastest rather than whoever scopes the job right. The better move is to understand the decision tree before you need it: repair, overlay, or full tear-off, and which materials make sense for your house and your timeline.

The roof is also where the age and shape of the housing stock matter more than almost anywhere else. An older, taller house is not just a bigger version of a new ranch. It has different framing, different ventilation logic, sometimes a material tradition worth preserving, and a working height that changes both the price and the safety math. Scope follows the house, not the brochure.

01Old roofs, tall roofs: what the housing stock actually looks like

Public records put 6.4% of the state's single-family homes as built before 1900. That is the slate and cedar era, tens of thousands of houses whose original roof material was chosen to last a century and often has. On these houses the default assumption should be repair and preservation first, because the roof is part of what the house is worth, and the craftsmen who can work it are worth seeking out.

Height matters just as much as age: 40% have two or more stories. A two-story roof is not 40% more roof, but it is meaningfully more staging, more fall protection, more time moving material, and a narrower field of contractors who staff for it. When two quotes for the same house diverge wildly, working height and access are often the honest explanation, not padding.

02Reroof, overlay, or tear off

An overlay, new shingles installed over the old layer, is cheaper up front and tempting for that reason. But it hides the deck, so nobody inspects the plywood or plank sheathing underneath, and it adds weight and heat that shorten the new layer's life. Most codes allow only two layers, so an overlay also guarantees the next roof is a more expensive tear-off. A tear-off costs more today and buys you an inspected deck, proper underlayment, and modern ice protection at the eaves.

The contrarian truth: if you plan to own the house more than five years, the overlay is rarely the bargain it looks like. If you are selling within a year or two and the deck is known to be sound, an overlay can be a defensible bridge. Just be candid with yourself about which situation you are in.

03Asphalt, metal, or slate repair

Architectural asphalt shingles remain the default for good reason: broad installer availability, predictable cost, respectable 25 to 30 year service life. Standing-seam metal costs substantially more but sheds snow, resists ice damming, and can outlast two asphalt roofs, which changes the math for a long-hold owner.

If your house still carries original slate or cedar, pause before replacing it. Slate roofs are frequently repairable for decades at a fraction of replacement cost, and swapping slate for asphalt can hurt the value of a period house. The scarce resource is not slate, it is roofers who work in it, so vet that skill specifically.

04Ice dams in a snow climate

Ice dams form when heat escaping the house melts snow on the upper roof and the water refreezes at the cold eave, backing water up under the shingles. The fix people buy is heat cables. The fix that works is air sealing and insulation at the attic floor plus ventilation, so the roof deck stays cold and the snow melts evenly.

When you do reroof, insist on self-adhering membrane at the eaves and valleys. It is cheap insurance during the one week the roof is open, and impossible to add afterward without redoing the work.

05Flashing: the leaks that are not the shingles

A striking share of roof leaks have nothing to do with the shingle field. Chimneys, sidewalls, skylights, plumbing vents, and valleys are where water actually gets in, and all of them depend on flashing, the metalwork that bridges roof to everything else. A quote that itemizes new step flashing, counterflashing at the chimney, and new boots at every penetration is a quote from someone who understands where roofs fail. A quote that only counts squares of shingles is not.

06Repair or replace: the actual threshold

A localized problem on a roof under 15 years old is a repair. Widespread granule loss, curling tabs, or repeated leaks in different places on a roof past 20 years mean you are paying repair prices for replacement problems. One useful test: if this is the second leak in two years in a new location, stop patching and start pricing the reroof, because every patch from here is money you will not get back.

07What to weigh before you sign

A roof decision is really three decisions stacked together: scope, material, and timing. Get those right and the contractor choice gets much easier, because you can compare quotes on identical scope instead of guessing why they differ.

Roofing is one of the least DIY-friendly trades in the house, and not mainly because of skill. Falls are the issue, and steep or multi-story roofs multiply the risk. Homeowners can reasonably clear gutters, rake snow from the ground with a roof rake, and inspect with binoculars or a drone. Everything on the roof surface belongs with an insured roofing contractor, and work involving structural framing or a chimney tie-in may pull in a licensed builder or mason. Ask for proof of workers compensation coverage specifically; if a worker is hurt on your property and the contractor lacks it, the exposure can land on you.

08What it typically costs

National numbers swing on roof size, pitch, number of stories, tear-off layers, deck condition, and material grade, and regional labor markets add their own spread. Steep and tall roofs cost more per square foot because staging and safety take real time. Treat every figure here as a planning band, not a promise, and get scoped quotes on your actual roof.

Broad national planning ranges as of 2026, not quotes or offers. Local prices vary widely; get multiple written estimates for your own home.

09The short version

A roof rewards deciding early and scoping precisely, and punishes both panic and procrastination about equally. The right answer depends less on the shingle aisle than on your house's age, height, and how long you intend to keep it. A project is not good or bad on its own, it fits your plans or it does not. Know your hold period, know your deck, and the rest of the decision mostly makes itself.