Signs You Need New Siding

You likely need new siding when panels are warped, cracked or pulling loose, when the wall behind feels soft or shows rot, when water stains show up inside, or when repairs would cost about half of a full re-side. One cracked panel after a storm usually means a repair, not a new house.

Start with the bottom three courses

This Old House says to inspect the bottom three courses of siding, about 2 feet up from the ground, plus the joints and the trim around every window and door, and to do it once a year. That is where water sits longest. In Des Moines, the National Weather Service's normal snowfall is 36.5 inches a season, and plowed or shoveled snow piles right against those low courses. Walk the house on a dry day, press on the lower boards and look behind shrubs and downspouts, where damage hides.

Warped, cracked or loose panels

Angi puts warped, cracked or loose siding at the top of its list of signs, because a panel that pulls away from the wall lets wind-driven rain behind it. On vinyl, look for cracked corners, holes and panels that have unlocked from the course below. Angi notes vinyl can become brittle and break in extreme cold, which is why a puck, a ball or hail does more damage in January than in July. On wood and engineered wood, look for cupped boards and open butt joints. One or two damaged pieces can usually be replaced. See our guide to hail damage to siding and gutters if a storm caused it.

Soft spots, rot and water stains

This Old House lists soft or spongy spots, often with mold or mildew, warping or buckling, peeling paint and, in bad cases, water stains on interior walls as signs of water damage. Angi adds bubbling or blistering on the face of the siding and peeling interior paint or wallpaper on outside walls. These signs matter more than looks, because the sheathing and framing behind the siding may already be wet. Mold alone does not always mean replacement, but the water source has to be found and fixed. Rot around window trim is a common place to start digging.

Fading and rising energy bills

Angi lists fading and discoloration as a sign, since vinyl fades with sun exposure and painted wood discolors when the finish fails. Faded vinyl alone is a looks issue, and it is often the reason people re-side before they sell. Angi also lists higher utility bills without a change in use, because siding is part of the wall's protection against air leaks. If your bills climb and the walls feel cold, have the siding, wrap and window trim checked together.

Gutters are often the real cause

This Old House names overflowing gutters and poor drainage as moisture sources for siding. A clogged or sagging gutter dumps roof water down the same few feet of wall every storm, and that is where the rot shows up first. Siding should also sit at least 6 inches above the ground and at least 2 inches above roofing, according to This Old House, because tight gaps let wood wick up moisture. Before you replace siding below a gutter, fix the gutter. Our gutter repair service handles sagging runs, leaky seams and bad pitch.

Age and discontinued profiles

Angi gives vinyl, wood and engineered wood a typical life of about 20 to 40 years, and fiber cement and aluminum about 30 to 50 years. Age alone is not a reason to tear siding off, but older siding brings a practical problem: Angi notes older profiles and colors are more likely to be discontinued, so a patch may not match. If your siding is near the end of its life and needs repairs on more than one wall, a full re-side is often the cleaner fix.

Repair or replace: the 30 and 50 percent rule

Angi's October 2026 data puts the average siding repair at $928. Its rule of thumb is to repair when the fix costs less than 30 percent of a full replacement and the siding has more than 10 years left, and to replace when repairs reach 50 percent or more, or when there is leaking, mold, rot or water damage. Frequent repairs are a sign in their own right. Our siding replacement cost guide covers the full-job numbers. Your actual price comes from a free estimate.

Common Questions

What to Do Next

If you see any of these signs, let us take a look before it spreads. Call or text Luke at (515) 901-3646 or request a free estimate for a siding and gutter check.

See our siding service or call or text (515) 901-3646.