Commercial Gutter Repair in Hampstead, NH

A building's gutter leak rarely stays a gutter problem. It becomes a tenant complaint, a stained ceiling or a patch of ice at the door. This page covers the repair side of our commercial gutters work, and it is written for whoever gets that phone call.

Commercial gutter repair in Hampstead, NH starts at the seams

Seams are the first place we look, because a long gutter has to move. Aluminum grows and shrinks with temperature, and that movement works at corners, end caps and outlets. Over a long eave, the strain adds up.

Our record backs that up. After we cleaned a 30,000 square foot building in Plaistow, Jaimie B. asked us to do "some repair work on some of the seams". We came back a couple days later and finished the job. Jaimie B. went on to plan annual service with us.

Commercial gutter seam repair follows the same rule as any joint. The old sealant comes off, the metal gets cleaned, and the new seal goes on clean, dry metal.

What a commercial repair includes

A repair visit fixes what the water test shows, and nothing is assumed from the ground. We cover:

• Removing failed sealant and cleaning the joint to bare, dry metal
• Resealing seams, corners, end caps and outlets with a flexible, weather-rated sealant
• Replacing loose or missing fasteners and re-hanging sagging sections
• Replacing a crushed or detached downspout section
• A water test after the repair to confirm the joint holds

Sealant does not bond to wet, dirty or oxidized metal, and it needs time to cure before water runs through it. That is why we clean first and test at the end, not in the middle. Ask any contractor what sealant the quote uses and whether the joint is cured before it is tested.

Is it a plaza gutter leak or a roof leak?

Check when the water appears and where it comes in. A stain at the top of an outside wall that shows up in heavy rain often points to gutter overflow or water behind the fascia. A stain farther into the building usually points at the roof, which is a question for your roofer.

Three quick checks help before you call:

• Does the leak follow heavy rain, or any rain at all?
• Is the gutter above it dripping, spilling or dry?
• Did it start after a thaw, when ice may have forced a joint?

We will tell you if the problem is not a gutter problem. Steve K. wrote that Caio spotted things "beyond what we knew about", and that kind of plain report is what you should expect.

Signs and causes of commercial gutter leaks

Most leaks have one of four causes, and each one shows a different sign:

• Failed sealant: a steady drip at one joint, worst in heavy rain.
• Loose hangers: a sag between fasteners with water pooling in the dip.
• Ice force: a corner or end cap pushed apart after a hard freeze.
• Soft fascia: hangers that will not stay tight, because the wood behind them has been wet for a long time.

Soft fascia changes the repair. New hangers will not hold in rotted wood, so the board comes first, and the gutter goes back on afterward.

Building gutter repair: failures that reach tenants

Most building gutter repair falls into a few types.

Lower downspouts take most of the abuse on a commercial site, from plows, carts and delivery trucks. A commercial downspout repair is usually small, but a crushed section can back water up the whole run.

Winter adds its own load. Ice weighs about 57 to 60 pounds per cubic foot, so a gutter full of it pulls hard on its hangers, and Hampstead sees around 62 days of snow cover a year (Dwellics).

The commercial repair visit

1. You tell us where the problem shows up and who needs to know we are on site.
2. We look at the whole run, not only the wet spot.
3. We clean the section and run water to find the actual failure.
4. You get a written price for what we found, including any options.
5. We make the repair, fasten anything loose and test it with water.
6. We report what else we saw, so you can plan for it.

If water is coming in right now, say so when you call and we'll set the earliest visit we can.

What should go in your building file after a repair?

Keep a short record each time, because the person managing the building in five years will need it. Note the date, the location of the repair on the building, what failed and what was done. Keep our written price with it.

A record also shows patterns. If the same corner fails twice, the cause is probably a pitch or hanger problem, and it deserves a different fix. Jewell told Google that we came up with a way to "fix the entire problem" rather than patch it, and repair records are how you spot when that is needed.

Why Lanes Gutters for commercial repair

The documented repair is one building: seams on a 30,000 sq ft Plaistow property, done a couple of days after the cleaning. Reviewers also credit us with finding problems beyond what the customer knew about, and with explaining things clearly. Google shows 5.0 from 29 reviews as of November 2026. We scope anything beyond seam work on a walk-through before we quote it.

What moves the price of a commercial repair

We price repairs after seeing them. The cost usually depends on these factors:

• Number of joints or sections that need work
• Height and how we reach them
• Whether parts need replacing or only sealing
• Whether the run needs its pitch corrected
• Whether wet fascia or trim has been damaged behind the gutter
• When we can work around tenants

Replacement is the comparison, so ask for repair and section replacement priced side by side. A cheap patch that fails twice costs more than a sound section.

Annual visits help keep repairs small. Our guide to annual commercial gutter maintenance shows how to plan them. If repairs have stopped making sense, see commercial gutter installation, and if your building has gutters built into the roof edge, read about box gutters and call first.

Permits, insurance and town rules for commercial repairs

Fixing an existing gutter is usually routine maintenance. We could not confirm whether any New Hampshire town requires a permit for it, and permits are handled town by town, so ask your building office. No New Hampshire state license for gutter contractors turned up in our checks. If a repair means digging for a buried drain line, Dig Safe must be called first. Your lease or insurer may require a certificate of insurance from vendors, so ask any contractor for theirs and tell us early which paperwork you need.

We repair commercial gutters from Hampstead across towns including Plaistow, Salem and Atkinson.