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Clear Lake pontoon repair
Pontoon Boat Repair in League City, TX: Mobile Welding for Clear Lake and Galveston Bay Boats
Pontoons around League City live a harder life than lake boats. Brackish water in Clear Lake, salt in Galveston Bay, tides, barnacles and humid air all work on the aluminum every day. Sooner or later that shows up as pitting, a pinhole leak or a bracket that cracked where corrosion thinned the metal. Alpha Mobile Welding TX sends partner welders to canal homes, marinas and storage lots around Clear Lake to repair pontoon tubes and frames on site. Text photos to start.
Close-up photos of corrosion or cracks help us quote faster. Visits depend on partner availability.
Clear Lake area repairs
What Pontoon Repair Looks Like Around Clear Lake
League City sits on the Clear Creek and Clear Lake side of Galveston Bay, with South Shore Harbour, Kemah, Seabrook and Nassau Bay all close by. The water here is brackish to salty depending on rain, tide and wind, and pontoons that sit in it, or on lifts over it, corrode much faster than boats on an inland lake. Corrosion thins the tube skin, opens pinholes and weakens the metal around brackets and fasteners.
Repairing a saltwater pontoon takes more prep than a lake boat. Partner welders pressure-test the tubes to find every leak, then grind pitted areas back to solid aluminum before any welding. Small pits get welded with 5356 filler using TIG or a spool gun, and thinned areas get rounded doubler plates. Fasteners and contact points get checked for galvanic corrosion, and the chamber is retested before the boat goes back over the water.
The main pontoon boat repair page lists every service. For docks, rails, gates and trailers, see our League City mobile welding page.
- Clear Lake, Clear Creek and the bay
- Saltwater corrosion and pitting
- Pinhole and seam leaks
- Bracket and cross member repair
- Canal home lifts and marinas
Common damage
Pontoon Problems Common in Clear Lake and the Bay
Salt, tides and marine growth add a layer of problems inland boats never see.
Pitting and pinhole leaks
Salt left on the tubes eats small pits into the aluminum, often under brackets and along the waterline. Some of them go all the way through.
Galvanic corrosion
Stainless bolts, steel lift parts, copper-based bottom paint and dock wiring all speed up corrosion on aluminum in salt water.
Bracket cracks in thinned metal
Corrosion weakens the metal around bracket welds. Add wave chop from the bay and those brackets crack sooner than on a lake boat.
Marine growth damage
Barnacles and growth on tubes left in the water hold moisture and salt against the metal, and scraping them off can gouge the skin.
Oyster reef and shell strikes
Shallow reefs and shell bottoms around the bay and bayous slice keels and nose cones on boats that run outside the channel.
Storm damage
Tropical storms and hurricanes push boats into docks, lifts and each other. Torn brackets and dented, cracked cones follow.
What we repair
Mobile Pontoon Welding Services in League City
Saltwater repairs start with finding the extent of the corrosion, not just the leak.
Corrosion and pitting repair
Grinding pitted areas to solid aluminum, welding small pits and adding rounded doubler plates where the wall has thinned.
Tube leak repair
Low-pressure air and soap testing, draining, grinding to sound metal and 5356 welds, then a second test.
Bracket and cross member repair
Rewelding cracked brackets, reinforcing with gussets and replacing corroded cross members under the deck.
Nose cone and keel repair
Patching and rewelding cones and keels damaged by reefs, shell bottoms or docks, plus new keel guards.
Galvanic isolation
Replacing or isolating stainless fasteners where they touch aluminum, and flagging dock wiring issues for an electrician.
Trailer welding
Rusted crossmembers, bunk brackets and tongues on trailers that get dunked in salt water at every launch.
Why Alpha Welding
Why Clear Lake Boaters Call Alpha Welding
Saltwater pontoons need repairs that account for the salt.
Repairs at your lift
Canal homes and marina lifts usually allow repairs on site, with the tubes raised and dry.
Corrosion-aware repairs
Partners grind back to sound metal before welding, because welding over pitted aluminum doesn’t hold.
Aluminum focus
AC TIG and spool-gun setups made for thin marine aluminum, not heavy steel rigs.
Honest scope
If corrosion has gone too far for a patch, you’ll hear that before paying for one.
How it works
How a League City Pontoon Repair Works
Clear steps from photos to retest.
Send photos
Call or text 979-250-7486 with close-ups of the damage and the boat’s location.
Estimate
We review the corrosion or damage and explain the price, prep and any marina approvals.
On-site repair
The partner tests, grinds, welds and adds doublers where needed.
Retest
Low-pressure air and soap confirm the chamber is sealed before the lift goes down.
Local guide
Saltwater Pontoon Repair Guide for Clear Lake Owners
Notes for pontoon owners in League City, Kemah, Seabrook and the rest of the Clear Lake area, from what partner welders see on salt and brackish water boats.
Why salt is so hard on pontoon tubes
Marine aluminum like 5052 resists corrosion well, but salt water and salt air still work on it. Salt crystals hold moisture against the metal, especially under brackets, along the waterline and in any crevice where dirt collects. Over time that leaves pits. Some stay shallow, and some go right through the tube wall and become pinhole leaks. Boats kept in the water or on a lift over the water corrode faster than boats stored dry and rinsed after every trip.
Galvanic corrosion and what causes it
When two different metals touch in salt water, the less noble one corrodes faster. On a pontoon, aluminum is usually the one that loses. Stainless steel bolts, steel trailer bunks, steel lift parts and copper-based antifouling paint all create problems where they contact the tubes. Stray electrical current from dock wiring can make it much worse. Partners look for pitting around fasteners and contact points and isolate or replace parts where possible. If stray current is suspected, have a marine electrician check the dock before you spend money on tube repairs.
Never use copper bottom paint on aluminum
Many antifouling bottom paints contain copper, and copper in contact with aluminum in salt water causes fast galvanic corrosion. If someone painted your pontoon tubes with a copper-based paint, the aluminum underneath may be pitted. Use only antifouling coatings labeled safe for aluminum, and if you’re unsure what’s on the boat now, mention it when you send photos.
Grinding back to sound metal
Welding over corroded aluminum doesn’t work. The weld won’t fuse properly to oxide and contamination, and porosity forms right away. Every pitted area gets ground until clean, bright, solid aluminum shows on all sides. Small pits are filled with 5356 filler. Where grinding leaves the wall too thin, a doubler plate with rounded corners is welded over the area so the load spreads out. Wide areas of deep pitting may mean a tube section or a full log should be replaced instead.
Finding every leak
Saltwater boats rarely have only one leak. The chamber is sealed, given a very small amount of air pressure, usually a couple of psi, and every seam, bracket and pitted area is brushed with soapy water. Each bubble gets marked. Too much pressure can split thin, corroded metal, so this is done with a regulator. Fixing every leak on the first visit is the only way to stop water from coming back.
Repairs on canal lifts and in marinas
Many League City and Clear Lake Shores homes have canal lifts, and that’s often the easiest place to repair a pontoon. The tubes need to be raised clear of the water, rinsed and completely dry. Marinas around Kemah, Seabrook and South Shore Harbour have their own hot work rules, so get approval before the visit. Some marinas prefer the boat be hauled to a work area or their yard, and partners can work there too with permission.
Rinsing and care between repairs
A freshwater rinse after every trip is the cheapest corrosion protection there is. Rinse the tubes, the brackets and the underside of the deck, not just the top. Flush the motor. If the boat lives on a lift, rinse it while it’s up. Check the tube drain plugs every month or so during the season. Catching a pinhole early means a quick weld instead of a doubler plate.
After a storm
Storms and surge, like Hurricane Ike in 2008, can wreck docks and lifts across the Clear Lake area. After a storm, check every tube for dents, split seams and torn brackets, and check the lift for bent parts before raising the boat. Photograph the damage for insurance before any repair work starts.
Oyster reefs, shell bottoms and keels
Galveston Bay, Dickinson Bayou and the shallow edges of Clear Lake have shell bottoms and oyster reefs that are easy to miss at mid tide. Running over them slices keel guards, scrapes the bottom of the tubes and can open a seam on a nose cone. Worn or cut keel strips get replaced, and gouges in the tube skin are ground smooth and checked for leaks before the boat goes back out.
Before the welder arrives
- Raise the boat on the lift or put it on the trailer
- Rinse the tubes with fresh water and let them dry
- Pull the tube drain plugs
- Get marina approval for hot work
- Tell us about foam-filled tubes or a center-log fuel tank
Related welding services
White powder on your tubes?
That’s aluminum corrosion. Send close-ups and we’ll tell you whether it needs grinding and doublers or just cleaning.
Service area
Pontoon Repair Near Me Around Clear Lake
Partner welders cover canal homes, marinas and storage lots around League City and Clear Lake. Availability is confirmed for each address, and marina jobs need the marina’s approval for hot work.
Clear Lake
- League City
- Kemah
- Seabrook
- Nassau Bay
- Clear Lake Shores
Bay side
- Galveston
- Dickinson
- Texas City
- San Leon
Mainland
- Friendswood
- Pearland
- Webster
- Alvin
FAQs
League City Pontoon Repair Questions
What Clear Lake area pontoon owners ask us most.
Is there a mobile pontoon welder near me in League City?
Alpha Mobile Welding TX coordinates partner welders who cover League City, Kemah, Seabrook, Nassau Bay, Dickinson and the Clear Lake area. Call or text 979-250-7486 with photos and the boat’s location, and we’ll confirm availability and give you an estimate.
Can saltwater corrosion on pontoon tubes be repaired?
Usually. Pitted areas are ground back to solid aluminum, small pits are welded with 5356 filler, and thin spots get doubler plates. If deep pitting covers large sections of a tube, replacing that section or the log may make more sense. Close-up photos help us tell.
Can you repair my pontoon on a canal lift?
In most cases, yes. The tubes must be raised clear of the water, rinsed and completely dry, with room for the welder to reach underneath. If the damage is in a spot the lift can’t expose, the boat goes on a trailer or stands.
What causes pinholes in a saltwater pontoon?
Mostly salt sitting on the aluminum and galvanic corrosion where stainless fasteners, steel parts or copper paint touch the tubes. Stray current from dock wiring can make it worse. Regular freshwater rinsing and isolating mixed metals slow it down a lot.
How much does saltwater pontoon repair cost?
It depends on how much corrosion there is, how many leaks the test finds, whether doubler plates are needed and access to the boat. A few pinholes cost far less than wide pitting that needs several doublers. Photos let us give you a realistic estimate.
How long does it take?
A few pinholes or one crack can often be fixed in a few hours, including testing and retesting. Corrosion repairs with doublers or several brackets take longer. Timing depends on partner availability, and same-day visits are never guaranteed.
Request an estimate
Get Your Clear Lake Pontoon Repaired
Send close-up photos and tell us where the boat is. We’ll reply with an estimate and partner availability around League City.
- Free, no-obligation estimates
- Photos help us understand the job faster
- Same-day requests depend on partner availability