How to Inspect Your Siding

Siding does more than make your house look good. It’s the primary barrier between your home’s structure and everything the weather can throw at it—rain, wind, sun, and temperature extremes. When siding fails, water gets behind it. That’s when the real damage starts, hidden from view until it becomes expensive.

Why This Matters

Siding protects the vulnerable structure underneath:

• Water infiltration – Gets behind siding and into walls
• Rot and decay – Moisture destroys wood framing
• Mold growth – Thrives in damp wall cavities
• Insect damage – Damp wood attracts termites and carpenter ants
• Insulation damage – Wet insulation fails and grows mold
• Structural problems – Continuous moisture weakens framing

Catching siding problems early means quick repairs. Ignoring them means expensive remediation.

Inspection by Siding Type

Vinyl Siding

The most common type. Durable but not invincible:

What to Look For:

• Cracks: Running through panels, especially near fasteners
• Holes: From impacts, hail, or pests
• Warping or buckling: Panels should lie flat
• Loose sections: Should be securely attached
• Gaps at seams: Where panels overlap
• Fading: Normal, but indicates aging
• Chalky residue: Surface oxidation

Check Closely:

• Bottom edges near the ground
• Areas near gutters and downspouts
• Around windows and doors
• At corners and transitions

Wood Siding

Beautiful but requires more maintenance:

What to Look For:

• Rot: Probe suspicious areas with screwdriver
• Peeling paint: Exposes wood to moisture
• Splitting and cracking: Along grain lines
• Cupping or warping: Boards should be flat
• Insect damage: Small holes, sawdust, mud tubes
• Discoloration: Can indicate moisture problems

Probe Test: Press screwdriver into wood. Solid wood resists. Soft wood indicates rot.

Fiber Cement Siding

Durable but can still have issues:

What to Look For:

• Cracks: Especially near fasteners or edges
• Chips and impact damage
• Paint failure: Peeling, bubbling, or fading
• Caulk failure: At joints and corners
• Loose panels: Should be securely fastened

Aluminum Siding

Less common today, but still present:

What to Look For:

• Dents: From impacts or hail
• Chalking: Oxidation on surface
• Fading: Color changes from UV exposure
• Loose sections: Fasteners backing out
• Corrosion: Especially near salt air

Stucco

Common in some regions:

What to Look For:

• Cracks: Can allow water intrusion
• Staining: Indicates water problems
• Bulging: May indicate delamination
• Soft spots: Probe to check integrity
• Efflorescence: White mineral deposits from moisture

Common Problem Areas

Some areas fail first. Give them extra attention:

Near Gutters and Downspouts

• Splash-back damages siding
• Overflow runs down walls
• Check for discoloration and rot

Bottom Edges

• Closest to ground moisture
• Splash-back from rain
• Vegetation contact
• Check at least 6 inches above grade

Around Windows and Doors

• Trim boards rot
• Caulk fails
• Water channels behind siding
• Check all four sides of each opening

Corners and Transitions

• Where siding meets other materials
• Corner boards collect moisture
• Flashing may be inadequate

Behind Shrubs and Bushes

• Can’t see damage
• Holds moisture against siding
• Provides pest pathways
• Trim back and inspect

Utility Penetrations

• Where pipes, wires, and vents exit
• Caulk and flashing often fail
• Small gaps let in lots of water

Step-by-Step Inspection

Step 1: Walk the Perimeter

1. Start at one corner
2. Walk slowly around the entire house
3. Look at each section of siding
4. Note anything that looks wrong

Step 2: Get Closer

1. Approach areas that looked suspicious
2. Look for details you missed from a distance
3. Probe suspicious spots with your screwdriver
4. Feel for softness or give

Step 3: Check High Areas

1. Use binoculars to see upper floors
2. Check eaves and gables
3. Look near the roofline

Step 4: Inspect Details

1. Check all window and door trim
2. Examine corner boards
3. Look at utility penetrations
4. Check where siding meets foundation

Step 5: Document Problems

1. Take photos of damaged areas
2. Note locations for later repair
3. Estimate extent of problems

When to Repair vs. Replace

Minor Damage (Repair)

• A few cracked or loose pieces
• Small areas of rot
• Isolated paint failure
• Failed caulk at seams

Major Damage (Assess for Replacement)

• Widespread rot or decay
• Extensive cracking
• Large sections loose or missing
• Systemic failure of paint or finish
• Evidence of water intrusion behind siding

DIY vs. Call a Pro

DIY: Inspection, minor repairs (replacing individual pieces), caulk and paint maintenance.

Call a pro: Extensive damage, full siding replacement, or if you suspect hidden water damage. Siding contractors can assess the full scope and recommend repair or replacement. Find a contractor →

How Often to Inspect

• Full inspection: Once a year
• After major storms: Check for damage
• Before painting: Assess condition
• When you see changes: Investigate immediately

The Bottom Line

Siding protects everything inside your walls from everything outside them. Spend thirty minutes once a year walking around your house with a critical eye. Look for cracks, rot, loose pieces, and gaps. Fix small problems before they become big ones. Your siding is doing important work—make sure it can keep doing it.