Why Do Older Homes Have More Pipe Burst Problems?

The plumbing in older homes is simply older. Materials like galvanized steel, which was common in mid-20th century construction, corrode from the inside out over 40 to 60 years. This corrosion, called scaling, narrows the pipe's interior. The restricted flow increases pressure on the weakened walls, making a rupture far more likely than in a modern home with copper or PEX piping.

Cast iron drain lines are also prone to failure from rust, especially at joints and bends. This type of deterioration happens slowly, so you might not notice a problem until a major leak or burst occurs. Regular inspections of visible plumbing in basements or crawl spaces can help you spot advanced corrosion before it causes a catastrophic failure.

Freeze-thaw cycles are a major culprit for pipe bursts, and older homes are more vulnerable. Their plumbing is frequently located in poorly insulated areas that modern codes would protect. Each time water inside a pipe freezes, it expands, putting immense pressure on the pipe walls. When it thaws, the pressure drops, but the metal has been stressed.

After decades of these cycles, the metal becomes fatigued. Microscopic cracks form and grow, especially at solder joints in copper or threaded connections in steel. A pipe that has survived many mild winters can suddenly fail during an unusually cold snap. This is why preventative insulation of pipes in attics and crawl spaces is so important for older structures.

• Pipes in older homes are often in uninsulated spaces like crawl spaces or exterior walls.
• Repeated freezing and thawing causes metal pipes to expand and contract, fatiguing the material.
• This cyclical stress worsens existing corrosion and can cause joints to pull apart.
• A single deep freeze can be the final event that causes a weakened pipe to burst.
• Cold winters in many regions make this a relevant seasonal risk for older properties.
• Knowing your main water shutoff valve location is critical for any homeowner.

If a pipe bursts, your first step is to stop the water flow. Locate your main shutoff valve and turn it clockwise until it stops. This valve is often found where the main water line enters your home, such as in the basement or a utility closet. Keep your shutoff valve location written down in an easy-to-find place.

After stopping the water, you need to address the flooding quickly to prevent secondary damage like mold and structural rot. While you can start removing standing water, a professional drying process is usually required. Local water damage pros have industrial equipment for thorough water extraction, structural drying, and dehumidification to properly dry walls and floors.

• Immediately shut off the main water supply to your home.
• Turn off electricity to the affected area if it's safe to do so.
• Contact local water damage pros for emergency water extraction.
• Move valuable items and furniture away from the water if possible.
• Document the damage with photos for your insurance company.
• Begin drying the area with fans and dehumidifiers while waiting for help.