5 Potential Problem Areas in Your New Old Home

by James Fitzgerald
Old damaged roof of asbestos shingles requiring repair. Dirty beams and torn waterproofing of roofing material.

Older houses have a certain charm and character not often shared by their modern counterparts, and they’re usually a lot more affordable to boot. However, everything deteriorates over time. Some of the old and outdated features found in older homes can be incredibly expensive to repair or replace.

Read More Home Improvement Articles

So before you sign the dotted line on the home you’re considering, make sure that you and your home inspector look for these common — some of the most expensive — old-home problems.

Look For These Problems When Buying an Older Home

Foundation and Structural Issues

Foundations can settle and crack for a variety of reasons, including excessive soil moisture, tree roots, seismic activity, freeze-thaw cycles and natural settlement over time. When this happens, serious structural damage and compromised structural integrity of the home often results.

Signs of a settling foundation include:

  • Cracks in interior and exterior walls
  • Uneven and off-level floors
  • Visible cracks in the slab
  • Windows and doors that are hard to open or won’t latch

If you identify any of these signs, you should hire a structural engineer to assess the extent of the damage and determine the necessary repairs. The cost of repairing a foundation can vary greatly based on the repair, from a few hundred dollars to repair a minor foundation crack, to over $20,000 to replace the entire foundation. Those costs don’t include the secondary structural damage caused by the underlying foundation issue, which can also vary considerably.

Man Collecting Water In Bucket From Ceiling. Ceiling panels damaged huge hole in roof from rainwater leakage.Water damaged ceiling .

Roof Leaks

The most common roofing material is asphalt shingles, which can last anywhere from 15 to 50 years depending on the environmental factors they’re exposed to, the quality of the installation, and how well they were maintained.

Shingles that are past their prime are prone to leaking, which can damage the structural integrity of the roof and can cause interior water damage or mold development.

Indications of a possible roof leak include:

  • Water stains on the walls or ceilings
  • Water stains or damage in the attic, especially on the insulation, roof sheathing (plywood sheets below the shingles), ceiling joists and roof rafters.
  • Damaged or missing shingles
  • Damaged or missing flashing, which is the flat and thin metal sheets around the roof’s perimeter, joints and seams used to prevent moisture penetration into those areas.

If you identify any of these signs, it’s important to consult a roofing contractor to assess the extent of the damage and determine the necessary repairs. The costs of roof repairs can vary wildly. Replacing some shingles or flashing is a relatively cheap project, compared to the tens of thousands of dollars it costs to replace an entire roof.

Old damaged roof of asbestos shingles requiring repair. Dirty beams and torn waterproofing of roofing material.

Toxic Materials

Homes built before 1980 often used materials that were eventually banned after being found to be toxic, like lead and asbestos.

Lead acts as a neurotoxin if it’s inhaled or ingested, and it’s especially harmful to young children. Before it was banned in 1978, it was widely used in paint and plumbing fixtures. Unfortunately, lead paint is difficult to identify with an untrained eye, but a lead paint test kit can be used to determine if the paint contains lead. However, you can check for a lead pipe by scraping it with a screwdriver. If the scraped part is silver and shiny, it’s a lead pipe. While lead paint usually isn’t harmful unless it becomes airborne in the process of sanding or scraping it, lead pipes can contaminate the home’s drinking water.

Lead paint can be dealt with by painting over it to seal it in, or by having the paint completely removed. If you want to remove the lead paint, you should hire a professional that specializes in lead removal. Doing so can cost between $8 and $17 per square foot.

The best way to handle lead pipes is to have them completely removed and replaced with new ones, which can cost upwards of $5,000. A more affordable (but less effective) alternative is to either install a whole-home water filtration system or have individual filters installed on sink faucets, shower heads and hose bibbs.

Asbestos was a common insulation and fireproofing material that was banned in 1989 when it was found to cause lung cancer. Asbestos should only be removed by a licensed remediation specialist, which can cost $1,000 to $30,000 or more, depending on the extent of the removal.

More Related Articles:

Critical case for a major plumbing and drainage repair


Plumbing pipes corrode over time, leading to poor drainage, lacking water pressure, leaks that can cause water damage or pipes that rupture completely and flood the home.

Plumbing pipes can be made from a number of different materials with varying lifespans. Lead and PVC pipes (plastic and white in color) can last at least 100 years. Copper and brass pipes can last up to 40 years, while galvanized steel pipes (metallic gray in color) may last as few as 20 years. Polybutylene pipes (usually gray and stamped with the code “PB2110”) have a lifespan between 10 and 15 years.

Galvanized steel pipes were regularly used until the 1970s, but they‘re still allowed by building codes despite their short lifespan, tendency to cause water discoloration and poor water pressure once they begin to corrode. Polybutylene pipes were common in homes built between 1970 and 1990. However, they’re now against building codes because they rapidly corrode and fail when exposed to chlorine. If your new-old home has either type, it’s likely that all the piping will need to be replaced.

The plumbing lines in an older house should be inspected for material, age and condition by a licensed plumber. The cost to replace plumbing pipes can range between a few hundred dollars for isolated sections of pipe, to tens of thousands for a whole-home replacement.

Hand in blue glove tears off wallpapers damaged by fungus

Mold and Mildew

Mold in attics, basements, crawlspaces and interior walls can occur in homes, both new and old. However, older homes often don’t have the underfloor or perimeter drainage that’s standard in newer homes, so moisture is more likely to accumulate, and mold is more likely to develop. Older homes are also more likely to have cracks in the foundation, which lets moisture seep in, along with leaking roofs and pipes.

Mold can deteriorate the material that it’s growing on (like wooden structural framing members), and the spores the mold releases can trigger asthma, allergies and respiratory irritation when inhaled. If you see visible signs of mold — especially black mold — or smell a musty odor, you should have the home inspected by a mold remediation specialist to find the mold and determine the extent of the damage. The cost for mold removal is typically between $10 and $25 per square foot.

Brian Blunier horizontal electrician technician repairing electronic man male adult white Caucasian 30 30s 40 40s thirties forties forty thirty job career occupation profession employment blue collar labor laborer work working electrical electricity engineer wire wiring tool equipment meter service servicing circuit volt voltage breaker power watt wattage amp amperage current measuring galvanometer tech repairman board safety hardhat hat lifestyle VStock

Old and Outdated Electrical Wiring

The lifespan of electrical wiring is determined by the condition of its insulation. Once the insulation deteriorates and the underlying wire is exposed, short circuits, electrical shocks and electrical fires can result. While modern wiring can last over 100 years, wiring installed before 1960 usually lasts around 70 years, which means it may be nearing the end of its suggested lifespan.

Signs of bad wiring include:

  • Dim or flickering lights
  • Warm electrical outlets or light switches
  • Isolated power outages in certain rooms

Homes built prior to 1960 may have knob-and-tube wiring. This is a two-wire system that doesn’t have the ground wire used in modern wiring. Along with only having two wires, the identifying characteristic of knob-and-tube is that the wires will run through porcelain cylinders, called “insulators.”

The absence of a ground wire increases the risk of electrical surges and shocks, which can damage electronics and cause electrocutions. Because of this added risk, many homeowners insurance companies won’t insure homes with knob-and-tube wiring, and its presence may hinder your ability to obtain a mortgage for the home.

Additionally, homes with knob-and-tube wiring use two-prong electrical outlets. These aren‘t compatible with modern, three-prong electronics. While there’s no legal requirement to replace knob-and-tube wiring, it’s often recommended.

It’s highly recommended to have the home inspected by a licensed electrician to assess the condition of the home’s electrical wiring. Repair costs vary depending on what needs to be fixed. To have isolated sections of wire replaced, it may only cost you a few hundred dollars. On the other hand, it may cost thousands of dollars to have the entire home rewired.


Fast, Easy and Commitment Free.

Skip the search and get the number for a pro near you texted to your phone.

Talk to a local pro. We connect you to pros who are local and available to work.

Please select a category.
By clicking "Text Me A Pro" you agree to our Terms & Conditions, Privacy Policy, and California Privacy Policy.