Homeowner guide · North Texas
Common siding problems — and how urgent they are.
Match what you see on your walls to a likely cause, and know whether it needs attention this week or can wait for the next repaint.
Common problems
What that spot on your siding means.
What you see, what usually causes it and how urgent it is — sorted from “act this week” to “keep an eye on it”.
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Urgent
Loose or missing panels
- What you see
- Panels hanging open, slipped out of place or blown off — often at corners, gable ends and upper walls after high winds.
- Likely cause
- Wind lifting panels that were not fully locked or fastened, or brittle older vinyl.
- What to do
- Photograph it and note the storm date, keep people away from loose pieces, and get it closed up quickly — the open wall behind lets the next rain straight in.
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Urgent
Rot around windows or where a roof meets a wall
- What you see
- Soft or stained siding and trim below window corners, or a dark streak running down the wall below a roof line.
- Likely cause
- Missing or failed flashing — often no kick-out flashing where a roof edge dies into a sided wall — sending water behind the siding.
- What to do
- Have it opened up and inspected soon. Replacing the boards without fixing the flashing only hides the leak.
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Fix soon
Cracks, holes or chips after hail
- What you see
- Cracked or punctured vinyl, chipped fiber cement edges, dented wood, plus dents in gutters, vents and window wraps.
- Likely cause
- Hail impact. Vinyl is most likely to crack, especially older panels and in cold weather.
- What to do
- Photograph every wall before anything is cleaned, check your policy and file promptly, then get a line-item scope for your adjuster.
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Fix soon
Soft, rotted boards at the bottom of the wall
- What you see
- The lowest boards feel soft when pressed, look swollen or have peeling paint that keeps coming back.
- Likely cause
- Sprinkler spray, rain splashing off the ground, downspouts dumping next to the wall and no clearance above soil or mulch.
- What to do
- Redirect sprinklers and downspouts now. Damaged boards need replacing — together with the clearance problem, or they will rot again.
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Fix soon
Swollen, flaking hardboard edges
- What you see
- The bottom edge of lap boards is puffy, rough or crumbling, sometimes with a waffle-like texture where the surface has broken.
- Likely cause
- Hardboard (common on 1980s–90s homes) soaking up water through edges and nail holes once the paint film fails.
- What to do
- Paint cannot save swollen boards. Replace them — with fiber cement or engineered wood if the problem is on several walls.
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Fix soon
Delaminating plywood panels (T1-11)
- What you see
- Grooved panel siding with separating layers at the bottom edge and seams, often on gables, chimney chases or garage fronts.
- Likely cause
- Water entering the panel edges after the paint failed; poor flashing where panels meet trim or the roof.
- What to do
- Delaminated panels need replacing. Because they often double as wall sheathing, check what is behind them at the same time.
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Fix soon
Paint peeling or blistering in the same spots
- What you see
- Bubbles or peeling paint that returns in the same places after a repaint — often under windows or at the bottom of walls.
- Likely cause
- Moisture getting behind the paint from a leak, missing flashing or wet sheathing, not just old paint.
- What to do
- Find and fix the moisture source before repainting, or the new paint will fail the same way.
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Fix soon
Gaps and cracked caulk at trim and windows
- What you see
- Open joints, cracked or shrunken sealant around windows, doors, corner boards and butt joints.
- Likely cause
- Sealant ageing in Texas sun and heat, and normal movement of the house.
- What to do
- Cheap to fix and expensive to ignore: remove failed caulk and reseal with a quality exterior sealant, especially on south and west walls.
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Fix soon
Siding touching soil, mulch or pavement
- What you see
- Bottom boards buried in mulch or sitting on the patio, driveway or soil with no gap.
- Likely cause
- Landscaping built up over the years, or siding installed without the clearance the manufacturer requires.
- What to do
- Pull mulch and soil back from the wall. The gap stops water wicking into the boards and makes termite entry easier to spot.
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Fix soon
Distorted vinyl near a neighbor’s windows
- What you see
- A patch of vinyl that looks melted or sagging on one wall, often facing a neighbor’s house.
- Likely cause
- Sunlight concentrated by reflective windows on a nearby building heating one spot past what vinyl can take.
- What to do
- Replace the damaged panels. Screens or shade on the reflecting side, or a heat-tolerant siding on that wall, prevent a repeat.
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Keep an eye on it
Warped, rippled or buckled vinyl
- What you see
- Wavy panels or bulges on long, sunny walls, sometimes worse in the afternoon.
- Likely cause
- Panels nailed too tight or without expansion gaps, so they cannot move as they heat up.
- What to do
- Usually fixable by re-hanging the affected panels correctly. Check again after a hot spell — if gaps open up, get it looked at.
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Keep an eye on it
Mildew, algae or dark streaks
- What you see
- Green, black or grey film, usually on shaded north walls or below roof edges and gutters.
- Likely cause
- Shade and moisture that let the surface stay damp; overflowing gutters.
- What to do
- Wash gently with a mild cleaner, a soft brush and a garden hose — not a pressure washer up close, which drives water behind siding. If it keeps coming back in one spot, look for a leak.
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Keep an eye on it
Faded or chalky siding
- What you see
- Color noticeably lighter on sunny walls, or a powdery residue on your hand when you rub the surface.
- Likely cause
- UV breaking down paint or vinyl pigments — normal ageing, fastest on south and west walls.
- What to do
- Cosmetic on its own. Painted siding is due for a repaint; very faded vinyl is a reason to plan replacement, not an emergency.
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Keep an eye on it
Round holes in wood trim
- What you see
- Clean, round holes about half an inch wide in wood trim, fascia or siding, sometimes with sawdust below.
- Likely cause
- Carpenter bees, common in Texas, boring into bare or weathered wood.
- What to do
- Fill the holes and keep the wood painted — they prefer bare wood. Replace trim that is badly damaged.
FAQ
Siding problem questions.
When is a siding problem an emergency?
When water can get into the wall: panels missing or hanging open, holes punched through by hail, or rot and staining around windows and roof lines. Close the opening as soon as you safely can.
Can I fix siding problems myself?
Some, yes: washing off mildew, resealing small caulk gaps, pulling mulch back from the wall and redirecting sprinklers. Anything involving rot, flashing, loose panels up high or damage behind the siding is worth a professional look.
Why does the same problem keep coming back after a repair?
Usually because the cause was not fixed — a missing flashing, a sprinkler hitting the wall, no ground clearance. The damaged board is the symptom; the water source is the problem.
Plano, TX
See something on your walls?
Send a few photos with the estimate request — the estimate is free.