Rotten Door Frame & Sill Repair

Ninety percent of door rot
lives in the bottom foot.

Walk any street in Chatham or Livingston after a rainstorm and watch what happens at the front doors: water sheets off the door face, splashes off the stoop, and lands exactly where the vertical jamb meets the sill. That intersection — the bottom twelve inches of the frame — absorbs more water per year than any other wood on the house, and it shows in our job log: the overwhelming majority of rotted door frame calls involve decay in that one zone, with the upper frame perfectly sound. Which raises the obvious question nobody selling you a $10,000 door replacement wants asked out loud: why replace an entire door system when the damage occupies one foot of one jamb?

What a rotting frame does before it looks bad

Door frame rot announces itself functionally before it does visually. The deadbolt starts needing a hip-check to throw, because the softening jamb is letting the frame shift out of square. A draft appears at the bottom corner that weatherstripping can't seem to fix, because the wood the weatherstripping presses against is collapsing. Paint at the jamb base bubbles and flakes off in sheets. The interior trim shows a faint gray water line. Ants appear — carpenter ants don't eat wood, but they excavate wet, rotted wood to nest in, and their presence at a door frame is nearly diagnostic. Then one day the casing at the base crumbles under a vacuum-cleaner bump, and you're searching "rotted door frame" at 10 PM. Every stage of that story is repairable; the earlier ones are just cheaper.

The security cost of soft wood

Here's the part that moves door frame rot repair from a maintenance list to a this-month list. Your locks are only anchored to wood. A deadbolt in a rotted jamb is a steel bolt held by screws in oatmeal — forced-entry attempts target exactly this, because a kick that a healthy frame shrugs off will burst a decayed one at the strike plate. Drafts are the same failure in slow motion: the compromised base lets the frame rack, the door stops meeting its stops evenly, and your heating dollars leak out the gap all winter. Rebuilding the base with spliced hardwood-grade repairs restores what the lock actually depends on — screw-holding density — and squares the frame so the door seals again. We finish with extended strike screws into the stud behind the jamb, which is cheap insurance no rotted frame should go without.

Entry, French, and patio doors each rot their own way

• Entry doors rot at the jamb bases and threshold ends, fed by stoop splash-back and missing drip caps — the classic bottom-twelve-inches pattern.
• French doors double the exposure: two leaves, a vulnerable center meeting point, and four jamb-to-sill joints instead of two. The inactive leaf's base, rarely opened and never inspected, is where we find the worst surprises.
• Patio doors collect water in the sill track itself — leaves clog the weep holes, water stands against the frame, and the rot starts from inside the track where nobody sees it until the wood at the corners goes dark.

All three share the same repairable anatomy, and all three are candidates for the same math: entry door replacements run $10,000 and up, French and patio door projects more, while rebuilding the rotted sections runs about 80% less. Backed by our 5-year workmanship warranty, performed by a fully insured crew, and rated 5.0 on Google by homeowners from Summit to West Caldwell who kept their original doors.

Rotten door frame repair across Chatham, Livingston, Summit, West Caldwell & Essex County · Mon–Fri 8:00 AM – 6:00 PM · (973) 564-0958

Door frame repair is its own discipline because the frame is load-bearing hardware territory: hinges torque it, deadbolts slam into it, weatherstripping compresses against it a dozen times a day. Our standard repair cuts the rotted jamb base back to sound wood with an angled scarf that sheds water, then splices in a dutchman of matching species — glued, pinned, planed flush — so hinge and strike screws bite into real grain again. Where decay is shallow, epoxy consolidation rebuilds the jamb face to full hardness without disturbing the door's fit at all.

Below all of it sits the part most contractors skip: the sill and threshold. A punky threshold gets replaced in rot-resistant stock over a flashed sill pan, sloped to drain, sealed at the jamb joints where end grain drinks water. Then we correct whatever delivered the water — failed caulk lines, a missing drip cap, splash-back off a settled stoop. Element replication covers the ornate casings on older entries. The result: a door that swings true, locks solid, and seals tight, on a frame that's ready for another few decades of weather.