The 11 Signs at a Glance
- Cracked, split, or warped panels
- Fading or chalking across entire walls
- Loose panels or visible gapping
- Peeling paint on wood siding (or on painted vinyl)
- Soft or rotting sheathing behind the siding
- Water stains inside on exterior walls
- Rising heating or cooling bills
- Carpenter bee damage on gables
- Mildew or mold that keeps coming back
- Visible daylight at panel seams
- Multiple failed repairs in the last 5 years
If you have 1-2 of these, a repair is probably fine. If you have 4+, you are looking at a reside and I will tell you that honestly.
Cracked, Split, or Warped Panels
What it looks like
Vinyl panels with visible cracks running across the face (usually from impact or cold). Aluminum panels with dents and splits. Cedar shakes with cracks that extend through the thickness. Hardie planks with cracks (rare, usually from impact).
Why it happens
Vinyl: Impact damage, cold-weather brittleness, installation that was too tight, or UV degradation at the 20+ year mark.
Aluminum: Physical impact, age-related fatigue.
Cedar: Natural splitting from weathering, especially at knots or grain defects.
Repair vs reside
Repair if the cracked panels are isolated to one wall section or one area. We carry 20 common vinyl colors on the truck and can do single-panel replacement.
Reside if cracking is widespread across multiple walls. Widespread cracking usually means the material has reached end-of-life and more panels will crack soon.
Uniform Fading or Chalking
What it looks like
A wall that used to be a rich color is now a washed-out version of itself. Run a finger along the surface and chalky residue comes off on your hand. Compare a shaded area to a sun-exposed area and the contrast is dramatic.
Why it happens
UV degradation breaks down the pigments in vinyl over time. Premium vinyl takes 25-40 years to reach significant fade. Cheap vinyl fades in 10-15 years. Salt air accelerates both.
Repair vs reside
Neither repair nor reside for fading alone, if the panels are structurally sound. You can power-wash chalking off with a mild detergent and the wall will look better temporarily. You cannot bring back the original color.
Reside if the fading is uniform across the whole house and you are bothered by the appearance. A reside is the only real fix.
Loose Panels or Gapping
What it looks like
Panels that are no longer fully seated in the J-channel. Gaps between courses that were not there originally. Panels that move when you push them. Daylight visible through a seam.
Why it happens
Fasteners have loosened from wind loading (nor'easters) or freeze-thaw cycling. Sometimes the original install was wrong (fastener depth too tight or too loose). Sometimes the underlying sheathing has softened and the fasteners no longer hold.
Repair vs reside
Repair if it is a small area (one wall section, a few courses). We re-fasten and re-seat panels all the time.
Reside if gapping is widespread. Widespread gapping usually means the install is reaching end of life or the sheathing is failing.
Peeling Paint on Wood Siding (or Painted Vinyl)
What it looks like
Paint flaking off in large strips. Bubbling or blistering. Paint that comes off in your hand when you rub it. Wood underneath visible through the paint.
Why it happens
Wood siding needs to be repainted every 7-10 years in LI climate. If it has been more than 10-12 years since the last paint job, the paint is usually failing.
Painted vinyl is almost always a sign that someone tried to fix faded vinyl with paint, which rarely works long-term because vinyl expands and contracts and the paint cracks.
Repair vs reside
Repair if the wood siding is still structurally sound and you are willing to scrape, prime, and repaint. This is a 2-weekend job on a typical house or $4,500-$8,000 professionally.
Reside if the wood is showing soft spots, rot, or extensive damage, or if you have painted vinyl that is peeling (the vinyl needs to come off).
Soft or Rotting Sheathing Behind the Siding
What it looks like
You usually cannot see this from the outside without removing a panel or two. Signs that hint at it: siding that bulges or waves in certain areas, nails that will not hold, a "soft" feel when you push on a panel, or water staining around windows and doors.
Why it happens
Water has gotten behind the siding (failed seams, bad flashing, ice dam infiltration) and has rotted the OSB or plywood sheathing underneath. Once sheathing starts rotting, it does not stop without intervention.
Repair vs reside
This is usually a reside conversation. Rotted sheathing cannot be fixed without removing the siding over it, replacing the bad sheathing, re-wrapping the wall, and re-siding. At that point, if more than 30% of any wall has rotted sheathing, we are talking about replacing the whole wall's siding anyway.
If sheathing damage is isolated to one small area (one bay under a window, for example), we can do a targeted repair. But this is rare. Water usually travels farther than you think.
Water Stains on Interior Walls
What it looks like
Discolored patches on interior drywall along an exterior wall. Paint that bubbles or peels in one spot. A musty smell in the basement or crawlspace along an exterior wall.
Why it happens
Water is getting through the siding, through the sheathing, through the wall wrap, and into the wall cavity. By the time you see it inside, you have a significant water infiltration problem that has been going on for months or years.
Repair vs reside
Reside in almost every case. Interior water staining means the exterior envelope has failed somewhere and you need to get behind the siding to find it, fix it, and prevent recurrence. Band-aid repairs rarely work for this because the water path is usually not where you think it is.
Rising Energy Bills
What it looks like
Your heating bill this winter is 15-30% higher than 3 years ago, even after accounting for fuel price changes. Your AC works harder than it used to. One room is noticeably colder in winter or hotter in summer.
Why it happens
Failing siding can let cold air infiltrate the wall cavity. Missing or compressed wall insulation (common on pre-1980 LI homes) compounds the problem. Improper air sealing around windows and doors lets heated air escape.
Repair vs reside
Reside with insulation upgrade is often the best answer for pre-1980 LI homes with rising energy bills. A CertainTeed CedarBoards insulated vinyl install adds R-3 to R-4 to your wall and measurably reduces heating bills. Hardie with a rigid foam layer behind it does the same.
This is one of the cases where a reside pays for itself slowly over years in energy savings, especially if your walls are poorly insulated.
Carpenter Bee Holes in Cedar Gables
What it looks like
Perfectly round half-inch holes drilled into the face of cedar shakes or cedar clapboard. Usually concentrated on the south-facing gable. Sawdust piles on the ground below. Sometimes you see the bees themselves (big black and yellow, look like bumblebees on steroids).
Why it happens
Carpenter bees love soft cedar. Long Island has a big population. Untreated gables can look like swiss cheese after 10-15 years.
Repair vs reside
Repair if bee damage is limited to a few holes in a small area. We can replace individual shakes and fill existing holes.
Reside (with Maibec instead of real cedar) if bee damage is widespread or if this is the second or third round of bee damage in the same area. The permanent fix is to replace real cedar with Maibec (engineered cedar that bees do not like) or Maxitile (fiber cement). See our real cedar vs Maibec guide.
Mildew or Mold That Returns
What it looks like
Green, gray, or black staining on the siding, usually on north-facing walls or walls shaded by mature trees. You clean it off with a hose and soft brush. It comes back within 6-12 months.
Why it happens
Shaded walls stay damp. Damp walls grow mildew. This is not a siding failure per se, it is a climate issue.
Repair vs reside
Neither, usually. Mildew is a cleaning issue, not a siding failure. Annual spring cleaning with a garden hose and a soft brush keeps it in check.
Reside only if the mildew has stained the material so deeply that it cannot be cleaned off, which is rare on premium vinyl and almost never on Hardie. If your cheap 1990s vinyl has permanent mildew staining, you are probably due for a reside anyway for other reasons.
Visible Daylight at Panel Seams
What it looks like
Stand inside a closet that backs to an exterior wall on a sunny day with the closet light off. Look at the corner where the wall meets the floor or ceiling. If you see tiny pinpricks of daylight, air is getting through your siding into your wall cavity.
Why it happens
Failed sealing at seams, missing or compressed wall wrap, or gaps at trim junctions.
Repair vs reside
Reside in most cases. Visible daylight means the exterior envelope has multiple failure points, not just one. We need to get behind the siding to properly air-seal and re-wrap the walls.
Multiple Failed Repairs in the Last 5 Years
What it looks like
You have had a contractor out to repair panels 3 or 4 times in the last few years. The fixes do not last. New problems appear a few months after each repair.
Why it happens
The siding is reaching end of life. Individual repairs stop holding because the surrounding material is also failing. You are playing whack-a-mole.
Repair vs reside
Reside. If you have had multiple repairs in 5 years, you will save money long-term by residing now instead of paying for ongoing repairs that do not solve the underlying problem.
This is the conversation I have most often with customers who have been putting off a reside for years. The money they spent on repairs would have covered a significant chunk of a proper reside if they had done it upfront.
The Honest Decision Framework
Count how many of the 11 signs apply to your house:
- 0-2 signs: Repair or maintenance. Call us for a single-day repair visit.
- 3-4 signs: Borderline. Get a walk-through from a contractor you trust. Sometimes repairs still make sense, sometimes it is time for a reside.
- 5-7 signs: Reside. You are past the point where repairs are a good investment.
- 8+ signs: Reside immediately. You are probably losing money monthly on energy bills, ongoing repairs, or deferred damage that will get worse.
If you are not sure, call us. Walk-throughs are free, they take 30-45 minutes, and I will tell you honestly whether you need a reside or just a repair. If the answer is "just a repair," we can usually do it the same week.
Schedule a walk-through → Free estimate Or call Mike direct → (516) 555-0100
Still have questions?
This guide was written by Mike Reilly. If your situation has a wrinkle we did not cover, call us direct. Most questions we answer by phone take five minutes.