How to hire the right exterior trade, from roof to foundation

01Think of the outside as one envelope, not a wish list.

The roof, walls, windows and foundation do one job together: keep weather out. Water that slips past any one of them goes looking for the others. So the outside is a system, and the smart order of work follows the water, not your mood board.

This is where the habit of calling a house good or bad misleads people. A new roof is not good in the abstract. It is worth it only if it fits how long you plan to stay, what you can spend, and how much risk you want to carry. The same roof is one decision on a house you sell next spring and a very different one on a house you will hold for twenty years.

A roof is not good or bad. It either fits how long you will stay, or it does not.

02Water comes from the top, so start at the roof.

Everything up top is there to move water off the house and away from it. The roofer keeps the surface sound. The gutter service catches what runs off and carries it clear of the walls and base. The chimney sweep and the skylight installer look after the two things that punch holes in the roof, because every hole is a place water tries to get back in.

Order matters here. A sound roof and working gutters come before anything cosmetic. A clogged gutter that dumps water at the foundation quietly runs up basement and structural bills far larger than a cleaning, so clear them, or fit guards, before you repaint or reside.

Watch for: storm-chasers. After a big storm, out-of-town crews knock on doors selling full roof replacements and insurance claims, then move on before any warranty matters. Ask a local roofer to inspect first. A repair often beats a replacement.

03The walls are the house's skin, so treat them like it.

The walls take sun, wind and rain all day. Siding is the skin over wood-framed walls, and a siding contractor replaces it when it cracks, warps or starts letting water behind it. A mason does the same job in brick, block and stone, and repairs the mortar that holds it together. An exterior painter is not only cosmetic: paint is the coat that keeps wood from rotting, so fresh paint on sound wood buys years.

Pressure washing is the cheap first move. It lifts grime, mildew and loose paint before you paint or sell, and often before you can even see what you are dealing with. On a short list of big jobs, it is usually the smallest bill and one of the best returns.

Watch for: work that hides problems instead of fixing them. Paint over soft, rotten wood just reseals the rot, and a pressure washer aimed wrong drives water up under the siding and into the wall. Fix the wood first, then wash with care.

04Windows, doors and the garage are where comfort leaks out.

These are the moving, sealed openings, and how well they are installed matters as much as what you buy. A window and door installer sets and seals each unit so air, water and heat stay on the right side; a good product fitted badly still leaks. A garage door service handles the largest moving part of most houses, the door, its springs and the opener, which is also a genuine safety item under that much spring tension.

Worth-it test: drafts, fogged glass and a door that will not latch are worth fixing for how you live day to day, not for resale math. Comfort is the payoff here, and that is a fine reason on its own.

Watch for: whole-house window replacement sold as an investment. New windows rarely pay back their full cost, and sometimes the fix is a failed seal or fresh weatherstripping, not the entire unit. Replace what is broken, keep what still works.

05At ground level, the foundation is serious and the yard is optional.

Where the house meets the ground, two very different jobs happen. Foundation and waterproofing is the serious one. It repairs cracks, settling and leaks, and keeps water out of the basement, and it is quietly the most important work in this whole guide, because water and movement down here threaten the structure itself.

A fence and deck builder does the opposite kind of work: fences, decks, railings and gates that shape the yard and its edges. This is lifestyle and curb appeal, worth doing for how you use the outside, not for protection.

Watch for: a foundation crew selling expensive crack injection or an interior drainage system when the real problem is water aimed at the house. Often the first fix is cheap: extend the downspouts and slope the soil away. Get a second opinion before any big below-grade contract. And for a deck, confirm a permit and proper footings, because a deck is structural and a failed one is dangerous.

06How to hire an exterior trade without regret.

The same short checklist works for every trade above. Ask for the state registration and current proof of insurance, and confirm the names on both match who actually shows up. Get more than one itemized quote so you are comparing scope, not just a bottom line. Put the scope, materials, timeline and cleanup in writing before anyone starts.

• Tie payments to milestones. A modest deposit is normal; a large upfront payment, or cash only, is a red flag.
• Ask who pulls the permit. For roofing, structural and many exterior jobs someone should, and it should be the contractor, not you.
• Get the warranty in writing, and remember it is only as good as the company still being here in five years.
• Ask for recent local references, then actually call one.

In Massachusetts, most home improvement contractors must be registered with the state, and structural work needs a licensed supervisor; who pulls the permit and what it costs is set locally, town by town. Other states draw these lines differently, so check the rules where you live.

Before you commit to a big exterior job, weigh it against what the home is actually worth, using numbers that carry a date instead of a guess.