Wood Rot & Dry Rot Repair Janesville, WI 53545

Carpentry in Janesville, WI (53545) · Local Professionals

Madison Carpentry · Fast response in Janesville and the Madison area · Free estimate 24h

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Janesville's Victorian and early-1900s homes along the Rock River sit on old stone basements that weep in spring, with wood sill plates and rim joists right at the damp line where freeze-thaw and moisture do their damage year after year. When a floor goes soft, or you spot rot creeping into fascia and deck framing, you need a carpenter who understands what water and Wisconsin winters do to wood in this part of the state.

Madison Carpentry serves Janesville and the surrounding Madison area with structural and finish carpentry work that starts with a straight diagnosis. We repair what can be repaired honestly, replace what needs replacing, and explain the work in plain terms. Our team handles the jobs that come up most often in older Janesville homes: sagging floors over soft joists, rotted sill plates and rim joists, damaged deck ledgers and porch posts, and fascia or soffit work after ice dams back water into wall cavities.

Carpentry in Janesville (53545)

Janesville's housing stock tells the story of water management in cold country. Your home may be a Victorian or Queen Anne with a stone foundation that's been weeping since the 1880s, or a post-war Cape Cod or ranch on a poured basement. Either way, the real enemy is not termites or heat. It is freeze-thaw cycle, heavy snow load on low-slope porch roofs, ice dams that back meltwater into fascia and wall cavities, and the humid lake-country springs when snowmelt soaks porch posts, deck ledgers, and stair stringers. Carpenter ants follow that moisture into soft sills and window frames. Wood rot and dry rot advance quietly in the dark, and by the time you notice a bouncy floor or soft spot in exterior trim, the damage is usually well underway.

We have spent years working in Madison and Janesville homes. We know what these buildings are made of, where water goes, and what happens when it stays there too long. We also know the difference between a repair that will hold and a patch that will fail. When a floor joist is soft but the wood is still sound enough to sister, we sister it. When a sill plate has rotted through and the rim joist is compromised, we replace both. We do not dramatize. We explain what we find, what it will cost to fix it right, and how long it will last.

Our services in Janesville

Wood Rot & Dry Rot Repair in Janesville · Madison's ice dams, spring snowmelt and humid lake-country summers keep…
Termite Damage Repair in Janesville · Subterranean termites are uncommon this far north…
Floor Joist & Subfloor Repair in Janesville · Sagging, bouncy or soft floors in Madison's older homes usually trace to joists…
Beam Replacement & Load-Bearing Wall Removal in Janesville · Open-concept conversions and failing beams call for real structural carpentry.
Framing & Structural Carpentry in Janesville · Remodel framing done right: new interior walls, basement and attic build-outs…
Finish & Trim Carpentry in Janesville · The details that separate a real finish carpenter from a handyman…
Crown Molding & Baseboard Installation in Janesville · Crown molding, baseboards, chair rail and window trim installed with the coped…
Custom Built-Ins & Shelving in Janesville · Built-in bookshelves, window seats, media walls…
Interior Door Installation & Repair in Janesville · Doors that stick, swing open on their own, or never latched right…
Exterior & Entry Door Installation in Janesville · Entry, back and French doors installed weather-tight against Wisconsin winters…
Cabinet & Vanity Installation in Janesville · Precise installation of kitchen cabinets…
Stair & Railing Repair in Janesville · Squeaky treads, loose banisters, worn stringers…
Deck & Porch Repair in Janesville · Snow load, freeze-thaw and spring meltwater are hard on Madison decks and the…
Fascia, Soffit & Exterior Trim Repair in Janesville · Peeling paint and soft fascia boards are the first sign of ice-dam meltwater or…

How a Job Works in Janesville

We start with a free on-site assessment. You describe what you have noticed, and we look at the wood, the moisture, the access, and the scope. We take photos if it helps, and we ask questions about when the problem started and whether you have had any pest inspections or water intrusion issues. We give you a clear estimate, answer your questions, and explain what the work will involve.

Once you approve, our team does the work. We show up on time, work clean, and keep your home secure. Structural work like floor joist repair, beam replacement, or load-bearing wall alterations will likely require a permit from the City of Janesville, and we coordinate with your local building department to make sure everything is done to code. Finish work like door installation, trim, or built-ins moves faster, but we take the same care. We protect your floors and furniture, haul debris as we go, and leave the site clean.

At the end, we walk through with you, show you the work, and make sure you are satisfied. We can help you document the damage and repair for an insurance claim if you need that. Then we are done, and your home is sound again.

Pricing depends on what the wood tells us. A small area of wood rot in fascia or trim might run 700 to 1200 dollars. A rotted sill plate and rim joist on a corner of the house, with sistering and replacement, often runs 1800 to 3500 dollars. A full floor joist and subfloor repair under a sagging room can range from 1800 to 5000 dollars or more, depending on the size of the area, how much wood is gone, and how we access it. Deck and porch repair starts around 900 dollars for a small section and can run several thousand for a full ledger replacement and joist work. Finish work like interior doors, trim, crown molding, and built-ins is priced by the piece or the linear foot, starting at 350 to 550 dollars for a single door or small trim job. The best way to know what your job will cost is to call us at (608) 471-7359 for a free estimate. We will come out, look at it, and give you a real number.

My floor is bouncy in one corner of the living room, and I can see the basement below has some moisture. Is this common in Janesville homes?

Very common. Janesville homes with stone or older basements often have moisture at the rim joist and sill plate line, especially in spring and after heavy snow melt. A bouncy floor usually means the floor joists have absorbed moisture and lost some strength, or the subfloor is soft. We come out and probe the wood to see how deep the damage goes. If it is just surface softening and the wood is still solid underneath, we can often repair it with sistering (adding a new joist alongside the old one) or selective replacement. If the damage is extensive, we replace the joists and subfloor. Either way, it is fixable, and the sooner you address it, the less the damage will spread.

I found wood rot in my fascia after an ice dam last winter. How urgent is this, and what does the repair involve?

Not an emergency, but worth addressing soon. Ice dams back water into the fascia, soffit, and wall cavities, and the wood absorbs moisture and begins to rot. The longer it sits, the more it spreads into the soffit, the wall framing, and sometimes the rim joist. We remove the rotted fascia and soffit, inspect the wall framing and rim joist behind it, and replace what is damaged. If the framing is sound, we install new fascia and soffit. If the rim joist or wall studs are compromised, we repair or replace those too. Call us at (608) 471-7359 and we will come look at it. Most fascia and soffit jobs run 700 to 1500 dollars depending on how much wood is gone and how much of your house is affected.

What does a floor joist and subfloor repair typically cost in Janesville?

A small repair, maybe 100 to 200 square feet of subfloor and one or two joists, often runs 1800 to 2500 dollars. A larger repair affecting half a room or more, or where multiple joists need sistering or replacement, can run 3000 to 5000 dollars or higher. The cost depends on how much wood is damaged, how we access it (tight basement or easy access makes a difference), whether we need to remove flooring and underlayment, and whether the work requires a permit. We give you a firm estimate after we look at it.

Do I need a permit for floor joist repair or other structural work in Janesville?

Structural work like floor joist and subfloor repair, beam replacement, or removing or altering a load-bearing wall commonly requires a permit from your local building department. Permit rules and thresholds vary by jurisdiction. You should contact the City of Janesville website at https://www.janesvillewi.gov/ or call your local building inspector to confirm what applies to your project. We coordinate with the building department once you have approved our estimate, and we make sure the work meets code. Finish work like door installation, trim, and built-ins rarely requires a permit, but we will tell you if yours does.

My deck is pulling away from the house, and I can see rot where the ledger board attaches. Is this something I should worry about?

Yes, and it should be fixed. A rotted or loose ledger board can eventually allow the deck to separate from the house, which is a safety hazard. More commonly, a rotted ledger means water is getting into the rim joist and wall framing, and the damage spreads from there. We remove the deck ledger, inspect the rim joist and wall framing behind it, replace any rotted wood, and reinstall the ledger with proper flashing to keep water out. Depending on the size of the deck and how much framing is damaged, this work often runs 900 to 2500 dollars. A permit is usually required. Call us at (608) 471-7359 to have it looked at.

Are you fully insured for work at my Janesville home?

Yes. We carry full general liability and workers' compensation insurance. Our team is protected, and your property is protected. We can help you document the damage and repair for an insurance claim if you need that, though we cannot promise that a claim will be approved or that the work will be covered by your policy. Your insurance company makes those decisions. We are here to do the work right and help you with the paperwork.

What should I do to prevent wood rot and water damage in my Janesville home over the winter and spring?

Keep gutters clean and flowing so water does not back up into fascia and soffits. Check your basement or crawl space in early spring for standing water or dampness at the sill plate and rim joist, and make sure your downspouts discharge well away from the foundation. Look at porch posts, deck ledgers, and exterior trim in late fall and early spring for soft spots or paint failure, which are early signs of moisture. If you see carpenter ants, get a pest inspection to rule out termites or advanced damage. Address small rot problems quickly before they spread. And if you have had ice dams or water intrusion in the past, have those areas inspected by a carpenter who knows what to look for. A small repair now is much cheaper than a large one later.