Rotted door frames and thresholds in Clearwater: why they rot at the bottom, and repair or replace

If paint is peeling at the bottom of your front door frame, or the wood feels soft when you press it, you're looking at one of the most common rot spots on a Florida house. The St. Pete–Clearwater airport averages 53.62 inches of rain a year, and 27.42 inches of it falls from June through August (NOAA's 1991–2020 climate normals). Much of that water lands near the bottom of the door, and in a city where the median home was built in 1978 (U.S. Census Bureau, ACS 2024), a lot of door frames have had decades of it.

This post is about the doorway: the jambs, the trim, the threshold and the framing beside it. For rot elsewhere on the house, see our guide to wood rot in Florida homes.

Why door frames rot at the bottom

Wood doesn't rot just because Florida is humid. The U.S. Forest Service's Wood Handbook says "serious decay occurs only when the moisture content of the wood is above the fiber saturation point (average 30%)," which takes liquid water like rain, condensation or wet ground. "By itself, the water vapor in humid air will not wet wood sufficiently to support significant decay."

At a door, the liquid water has plenty of ways in:

• Wind-driven rain. FEMA's Hurricane Ian advisory on doors and windows says water around openings "can cause dry rot and fastener corrosion that weaken the window or door frame or the wall itself."
• The threshold. The Florida Division of Emergency Management's Hurricane Retrofit Guide puts it plainly: a 3-foot door with a threshold crack 1/16 inch tall "is the same as a square hole 1 and 1/8" on a side."
• Missing or failed flashing. The Florida Building Code requires doors to be "installed and flashed in accordance with the fenestration manufacturer's written instructions" (FBC-Residential R609.1). R703.4 lists the accepted ways to flash door openings; under one of them, where no flashing instructions or details are provided, "pan flashing shall be installed at the sill."
• Splash and wet ground. Sprinklers aimed at the wall, A/C drain lines and gutters that dump at the door all keep the bottom of the frame wet. UF/IFAS says to direct irrigation heads and A/C drain lines away from your house.

The state's retrofit guide says the wood studs at the sides of doors "are commonly found to be somewhat rotted at their bottoms." That's why a little rot you can see on the trim can mean more behind it.

How to check your door frame

The state's guide tells homeowners to "look for peeling paint at the bottom of the door jamb and the door casing as well as peeling paint on the baseboard," and for blistered drywall near the door. If wood gives when you push on it, the guide suggests probing it with an ice pick in a couple of places, since the first spot "may just happen to hit hard grain." Our DIY guide walks through it: how to check an exterior door for rot and leaks.

Don't judge by looks alone. The Wood Handbook says strength losses "can be considerable" before decay is visible, and that "wood with visually discernible decay has been greatly reduced in all strength values."

Rot or termites?

Door frames are a favorite for both. UF/IFAS says "door frames are common access points" for termites because "doors often sit on expansion joints that allow subterranean termites to find their way in." Its signs:

• Subterranean termites: mud tubes, and damage that runs with the grain, sometimes "only leaving a thin veneer of undamaged wood at the surface."
• Drywood termites: no mud; smooth galleries across the grain and six-sided pellets pushed out of holes "about the size of a pen tip."
• Rot: brown rot leaves wood browner, cracked across the grain and crumbly, according to the Wood Handbook.

If you see tubes or pellets, UF/IFAS says to contact a licensed pest control company. Get the termites treated before the wood is repaired.

Photograph it before you touch anything

Before any repair, take photos of the bottom of both jambs, the threshold, the trim outside and the baseboard and floor inside. Get close-ups of soft or cracked wood, plus a wider shot that shows which door it is. If water comes in when it rains, take a short video while it's happening, and write down the date. Pictures help whoever repairs it see how far the damage went before it was opened up.

Repair or replace?

That depends on how far the rot goes and why it started. The Wood Handbook's rule for decay repairs is to fix the water first: "every effort should be made to correct the moisture condition that led to the damage." If the moisture can't be fully stopped, it says to replace infected parts with preservative-treated wood or naturally decay-resistant heartwood.

From there, the choices usually look like this:

• Trim or brickmold only. If the rot stops at the trim and the jamb and framing are sound, the trim can often be replaced and the joint resealed.
• The bottom of the jamb. A sound door with a rotted jamb bottom can sometimes be repaired in place. But Florida's code has a rule for substituting door components: they must comply with ANSI/WMA 100 or be evaluated by an approved evaluation entity, testing lab or engineer as providing "equal or greater structural performance" (FBC-R R609.10). Ask the manufacturer or the building department before changing parts of an exterior door.
• The framing beside the door, or a door that won't seal. When the studs are rotted or the frame has loosened, replacing the door unit and repairing the framing is usually the fix. Exterior doors are a product category that needs state or local product approval in Florida (ss. 553.842(4)–(5) and 553.8425, Florida Statutes), and new doors must be installed and flashed to the manufacturer's instructions.

Florida's existing-building code defines repairs as patching, restoring or replacing damaged materials to maintain them "in good or sound condition," and says the work "shall not make the building less conforming than it was before the repair was undertaken" (FBC-Existing Building 401.1, 401.3). Our door installation and repair service handles frames, jambs and door replacement, with our wood rot repair service for the framing.

Do you need a permit in Clearwater?

Clearwater's list of "Work That Requires a Permit" includes "Replacement of windows, doors, garage doors or skylights in existing or altered wall openings" and "Any building framing work." So replacing an exterior door, or repairing the studs beside it, needs a permit. Licensed contractors must submit door permits online, and the city's window and door requirements ask for "NOA's or Florida product approval numbers."

Doors aren't on Clearwater's under-$7,500 exemption request form, which lists only stucco, fence, drywall, driveway, patio, turf, non-impact shutters and temporary storm protection. State law leaves structural work out of that exemption too (s. 553.79(1)(g)). Our Clearwater building permits guide covers the rest.

What about replacing just the trim or a threshold, and keeping the door? Clearwater's pages don't mention trim or thresholds specifically (its no-permit list covers painting, flooring, cabinets and fixtures), so call the building department at (727) 562-4567 before you start.

Older homes and lead paint

Door frames are a lead paint hot spot. The EPA says old paint "especially on surfaces subject to constant friction like doors or window sills" can make hazardous chips and dust. Its rules name "modification of painted doors" and "planing thresholds to install weather-stripping" as renovation work (40 CFR 745.83). Generally, a firm paid to do that work in a home built before 1978 must be EPA-certified, with limited exceptions (40 CFR 745.82–745.83), and EPA says the firm that contracts the job needs certification even if it subcontracts the work.

We're not an EPA lead-safe certified firm. In a pre-1978 home, we refer work that disturbs painted surfaces to an EPA-certified firm, unless a certified inspector or renovator has found the paint isn't lead-based (40 CFR 745.82(a)). If you're doing it yourself, the EPA's lead-safe renovations for DIYers page says to assume lead paint if you can't confirm your home's age.

What door frame repairs cost

How much does it cost to repair a rotted door frame?

In Tampa Bay, Angi puts repair of an existing jamb or frame at $60 to $500, and a new frame and jamb at $200 to $650. If the door itself has to be replaced, Angi's Tampa average for door installation is $1,357. The price goes up when rot has reached the studs beside the door, when the door is a product-approved impact unit, and when the job needs a permit. See the full price guide for wood rot repair costs, including sills, siding and fascia.

Frequently asked questions

Why is my door frame rotting at the bottom?

Water collects there. The Wood Handbook says decay needs liquid water, not just humid air, and Florida's state retrofit guide says the studs beside doors are "commonly found to be somewhat rotted at their bottoms." Rain at the threshold, failed caulk or flashing, and sprinklers or gutters soaking the doorway are common sources.

Can you repair a rotted door frame, or does it need replacing?

If the rot is limited to trim or the bottom of the jamb and the framing is sound, it can often be repaired. If the studs beside the door are rotted or the door no longer seals, the door unit usually needs replacing, and in Clearwater that needs a permit.

Do I need a permit to replace an exterior door in Clearwater?

Yes. Clearwater's permit list includes "Replacement of windows, doors, garage doors or skylights in existing or altered wall openings." Clearwater's pages don't mention trim-only or threshold-only repairs specifically, so call (727) 562-4567.

Is it rot or termites?

Mud tubes or damage that follows the grain point to subterranean termites, and six-sided pellets point to drywood termites, according to UF/IFAS. Rot shows as soft, cracked or crumbly wood. If you see termite signs, call a licensed pest control company first.

Sources

• USDA Forest Service, Forest Products Laboratory: Wood Handbook, Chapter 14, Biodeterioration of Wood
• UF/IFAS Extension: Termite Prevention and Control (ENY-2044)
• NOAA NCEI: 1991–2020 climate normals, St. Petersburg–Clearwater International Airport
• FEMA: Hurricane Ian Recovery Advisory 3, Reducing Water Intrusion Through Windows and Doors (PDF)
• Florida Division of Emergency Management: Hurricane Retrofit Guide, Openings (hinged exterior doors)
• Florida Building Code, Residential, 8th Ed. (2023), Chapter 6, Wall Construction (R609)
• Florida Building Code, Residential, 8th Ed. (2023), Chapter 7, Wall Covering (R703.4)
• Florida Building Code, Existing Building, 8th Ed. (2023), Chapter 4, Repairs
• Florida Statutes s. 553.842, Product evaluation and approval (2026)
• Florida Statutes s. 553.8425, Local product approval (2026)
• Florida Statutes s. 553.79, Permits (2026)
• City of Clearwater: Get a building permit
• City of Clearwater: Building permit applications and forms
• City of Clearwater: Exempt building permit request portal
• City of Clearwater: Estimate your permit fees
• U.S. EPA: Renovation, Repair and Painting Program
• U.S. EPA: Frequent questions about firm certification under the RRP Rule
• U.S. EPA: Lead-safe renovations for DIYers
• eCFR: 40 CFR 745.82, Applicability
• eCFR: 40 CFR 745.83, Definitions
• U.S. Census Bureau: ACS 2024 5-year, median year structure built, Clearwater city (B25035)
• Angi: How much does door installation cost in Tampa? (Aug. 4, 2026)
• Angi: Carpentry framing repair cost