Cracked siding isn’t just about curb appeal, your siding is a layer of protection between your home's structure and the elements. Seemingly minor damage can lead to big problems, from being less energy efficient to water damage, potentially impacting your home’s structure and energy costs.

Cracks in siding material may appear insignificant, but their effects can be far-reaching. “[It's] more than just a cosmetic issue; it can let moisture seep in, potentially leading to mold, mildew, or even structural damage over time,” explains Mike Cimino, President of Monroe Roofing & Siding in Rochester, NY. “Siding can crack due to several factors, including physical impacts, weather-related stresses like extreme temperatures or natural aging. For instance, vinyl siding may become brittle in very cold weather, making it more prone to cracks if hit. Addressing these cracks quickly can help maintain the integrity and insulation of your home.” Homeowners who overlook these vulnerabilities risk a cascade of costly repairs or even possibly structural issues.

Common Causes of Cracked Siding

From physical impacts to climate challenges, siding damage happens for a wide variety of reasons, each with its own risks.

  • Weather extremes: Freezing weather conditions can make vinyl siding brittle, while harsh weather like scorching heat can warp materials, leading to cracking.
  • Aging materials: Over time, even high-quality siding products lose elasticity and durability, making it prone to splits and breaks.
  • Hail and debris impacts: Severe weather and storms often hurl debris or hailstones that can dent or crack siding, particularly in exposed areas.
  • Improper installation: Siding that isn’t installed with room for expansion and contraction is more likely to crack under temperature changes.
  • The lawnmower... or the kids: The lawnmower could fling rocks or other debris into the side of the house or an errant baseball during a game of catch could cause additional damage.
A Cape Cod house with shutters on the first floor windows.
As a house gets older, it's important to check the condition of the siding. Credit: oversnap / Getty Images

Risks Associated with Cracked Siding

Even minor cracks in siding create a target for moisture, pests, and drafts. These vulnerabilities can escalate quickly:

  • Water damage and mold: Moisture infiltration leads to wood rot, mold growth, and compromised indoor air quality.
  • Energy loss: Damaged siding can reduce insulation efficiency, leading to higher heating and cooling costs.
  • Structural risks: Persistent water exposure can weaken wooden frameworks, causing long-term structural damage.
  • Pest infestations: Openings in siding provide a path for insects and rodents to invade your home.

Signs It’s Time to Act on Siding Cracks

Knowing the telltale signs and when to address cracked siding is crucial. Look for these warning signs to decide whether it’s time to repair or replace:

  • Peeling exterior paint or discoloration near the cracks.
  • Noticeable drafts or uneven indoor temperatures.
  • Increased energy bills without a clear reason.
  • Signs of water damage or bubbling on interior walls.

How to Protect Your Home Against the Risks of Cracked Siding

Proactive measures can save homeowners time, stress, and expense.

  • Inspect your siding regularly. Walk around your home seasonally to look for signs of damage, like cracks, warping, loose siding, or poor installation.
  • Address cracks promptly. Even small cracks can worsen quickly, so repair or replace damaged siding as soon as possible.
  • Choose durable siding. When replacing siding, opt for weather-resistant materials suitable for your climate.
  • Hire experienced professionals. Proper installation ensures siding can withstand temperature fluctuations and other stresses.

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FAQ

How can I tell if cracked siding is causing water damage?

Water damage from cracked siding may manifest as peeling paint, soft spots on walls, or visible mold growth. Check for signs of water intrusion both inside and outside your home, especially after heavy rains. If unsure, consult a professional for an assessment.

Should I repair or replace cracked siding?

The answer depends on the types of damage and the type of siding. Is it cosmetic damage or major damage? Do you have wood siding or composite siding? A hole in asbestos siding or a dent in metal siding may be more costly than a vinyl siding repair. Do you have siding replacements lying around, like a piece of vinyl siding stored up in your garage rafters or do you have to buy replacement siding?

Small cracks can often be patched or sealed and generally are not expensive repairs, but widespread or deep cracks may indicate it’s time for a complete replacement. A professional contractor can help determine repair costs and help you decide the best course of action.