55 Ways You Cause Damage to Your Home and Don't Even Know It

Home experts say these seemingly minor mistakes could leave you with a major repair bill.

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It's easy to continuously think of doomsday scenarios when it comes to your home. What if you forgot to turn off the oven before you left for the day? What if your dishwasher overflows and floods your floor? But, in most cases, it's not accidents like these that cause damage to your house—it's little mistakes you're making every day that can lead to major repairs in the long run. With the help of architects, builders, exterminators, and other top home experts, we've rounded up the ways you're causing damage to your house every day without even realizing it.

1
Pouring grease down your drain

white hand scrubbing pan with steel wool
Shutterstock/rodimov

You're better off letting that dirty pan cool down on the stove rather than trying to pour cooking grease down your drain. "Oil, fats, and grease will solidify and form blockages in your pipes, which not only has a negative impact on the environment, but also creates issues for your septic system," according to Chris Diesso, owner of Rescue Cesspool & Drain. What kind of issues exactly? It could be as bad as an overflow of your plumbing.

2
Using chemical cleaners on painted cabinets

white woman scrubbing cabinet
Shutterstock/New Africa

Want to get your cabinetry gleaming? If those surfaces are painted, avoid the ammonia- and bleach-based cleaners you use in other parts of your home. "Harsh chemicals wear down the existing finish, resulting in a dull look," explains Chloe Brittain, an associate at kitchen refinishing company Not Just Paint. Similarly, using wax-based products can leave surfaces dull, sticky, and in need of a professional cleaning.

3
Using vinegar on granite counters

older man cleaning granite counter
Shutterstock/Berna Namoglu

It's time to step away from the vinegar-based cleaners if you want those gorgeous granite counters to look great for years to come. Any type of acidic cleaner like vinegar "removes the sealant and gradually reduces the sheen of these countertops over time," explains Melanie Hartmann, house buyer at Creo Home Buyers in Baltimore, Maryland. These cleaners can even erode the stone underneath, leaving you to foot the bill for a pricey replacement.

4
Or using lemon juice on marble

modern kitchen with white marble counters
Shutterstock/Jodie Johnson

Consider lemon-based products and your marble counters mortal enemies if you want to keep the latter in tip-top shape. "Lemons contain a high amount of citric acid, so when lemon juice touches marble countertops, it quickly starts to eat away at the surface," explains Leanne Stapf, COO of The Cleaning Authority. She recommends using a mixture of dish soap and warm water to clean them instead.

5
Using bleach on hardwood floors

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Bleach may be good for your whites, but it's not an all-purpose cleaning solution. If you're using bleach to remove a stain from your hardwood floors, "it will leave an even bigger stain or damage your wood," says Abe Navas, general manager of Emily's Maids in Dallas. Instead, use a wood-specific cleaning product, or have the flooring resurfaced if that stain just won't budge.

6
Using too much shampoo on your carpets

woman vacuuming up powder from carpet, easy home tips
Shutterstock/Andrey_Popov

Of course you want to rid your carpets of dirt, but overdoing it with the carpet shampooer could do more harm than good. If you don't remove a sufficient amount of product from your carpets, "you might unintentionally cause a mold problem to start growing," explains healthy home consultant Kimberly Button of Get Well Be Well.

To keep this from happening, she suggests removing as much moisture as possible with the carpet vacuum and opening windows to help your carpets dry out if they still feel damp after a cleaning.

7
Ignoring damp surfaces

mildew around bathtub, old school cleaning tips
Shutterstock/nadisja

Your carpets aren't the only part of your home that can become seriously damaged by dampness, however.

"If you see any kind of signs of water in your home that you are unclear of where it came from, investigate, preferably with the help of a professional," says real estate agent Jamie Safier with Douglas Elliman. (As a side note, Safier says that mold damage often isn't covered by homeowner's insurance policies.)

8
Nailing into the wall without finding a stud

woman hammering nail into white brick wall
Shutterstock/Syda Productions

Unless you want a pricey repair in your future, always use a stud finder before nailing or drilling into a wall. If you don't, the sheetrock or plaster below may not have sufficient support for the item, which can "damage the wall and break the item that is hanging," says Mike Morgan, owner of Morgan Inspection Services in central Texas.

9
Scrubbing walls with latex paint

white hand scrubbing white wall with red brush
Shutterstock/andy0man

Sure, you might not like the masterpiece your little ones drew on your walls, but scrubbing it off will only do greater damage over time. "Some of the color may come off because of the rubbing," cautions Harriet Jones, cleaning supervisor for Go Cleaners London. Scrub further and you could even cause moisture damage to the drywall beneath.

10
Having cables drilled in through your home's exterior

cable installation
Shutterstock/Nagy-Bagoly Arpad

While you may need cables drilled into your home to provide access to TV or internet, DIYing it—or having a less-than-experienced installer do the job—can create major problems. "Improperly sealed wall penetration will slowly and invisibly rot wood and potentially attract damp wood termites," explains architect Colin Haentjens.

11
Putting mulch up against the side of your house

Man Putting Mulch in Yard home problems
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While using some mulch in your garden can help protect your plants and cover up patchy areas, putting it too close to your home can cause serious damage over time. "Mulch retains moisture, causing rot and allowing termites easy access to the home," explains Morgan.

12
Not trimming your trees

overgrown trees near house
Shutterstock/yuda chen

Looking for an easy way to protect your house in a hurry? Start by trimming your trees. When tree branches grow too close to your home, this can "cause significant damage to the roof or siding … and cause significant rot" from the branches' moisture, according to Morgan.

13
Letting vines grow on your home

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Shutterstock/csy302

Vines may make your home look stately, but they can cause serious damage to your structure before you know it. "These trap water, vermin, insects, [and] are not a friend to your home," says real estate concierge Shannon Hall of Dwellings by Rudy & Hall.

14
Letting your landscaping slope toward your house

landscaping sloping toward house
Shutterstock/Bespaliy

Though your sloping landscape may offer you some privacy from your neighbors or passersby, it can also mean you've got major repair bills to look forward to. "Never let the grading around your home slope toward your home," cautions Hall, who says that this is a recipe for moisture damage.

15
Not cleaning your gutters frequently enough

closeup of hand in orange glove removing leaves and debris from gutter
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Think that gutter cleaning can wait until next year? Think again. "Debris builds up and blocks or impedes the gutter's water flow," leading to water damage inside your home, according to Mark Scott, president of Mark IV Builders, Inc. That build-up can even cause your gutters to fall or exterior wood trim to rot over time due to prolonged exposure to moisture, so Scott recommends cleaning them at least three times a year.

16
Removing your downspout extensions

man installing downspout extension, property damage
Shutterstock/Kuchina

While downspout extensions—the long piece of gutter that runs along the ground—may not be aesthetically pleasing, removing them can lead to much bigger problems down the line. Downspout extensions keep water away from your home's foundation, and by removing them, "you risk allowing water to pool directly at your foundation, increasing risk of water penetration into your basement," says Kate Ziegler, a realtor with Arborview Realty in Boston.

Not only can this compromise the integrity of your foundation, but it may even dampen the wood framing of your house, causing structural issues or attracting pests.

17
Not draining your water heater

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If you're not draining your water heater at least once a year, you could be setting your home up for major damage over time. The mineral deposits in your water heater "form a thick, crusty coating that will begin to chip off and clog faucets, drains, and the water heater valve," explains house flipper Shawn Breyer, owner of Atlanta House Buyers. This can cause the inner lining of your water heater to crack, requiring an eventual replacement.

18
Not using an exhaust fan in the bathroom

bathroom vent fan
Shutterstock

That exhaust fan in your bathroom isn't optional. If you don't run it for a bit when you get out of the shower, you could be causing serious damage to your space without even realizing it.

"[If] someone only turns the fan on for the duration of their shower … the average exhaust fan for a bathroom won't remove enough of the moist air," says Breyer. "Moist air combined with complete darkness causes mold to start forming."

19
Not drying off fully before you leave the shower or bath

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It's reasonable to assume that drying off on a bath mat is the most effective way to rid your body of excess moisture after a shower. But doing so could actually be harming your house. "The damp shower rug will allow moisture to seep into the linoleum flooring, causing the flooring to stain and begin warping," says Breyer.

20
Leaving wet towels on the floor

towels on floor home damage
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Leaving wet towels on your floor is more than just a housekeeping mistake. Much like standing water after a bath or shower, a wet towel can trap moisture, causing the flooring beneath it to stain, buckle, or rot.

21
Using toilet bowl cleaners on grout

Woman cleaning the grout on the tile walls
Shutterstock

That toilet bowl cleaner isn't the all-purpose bathroom product you might hope it would be. "Toilet bowl cleaners contain acids. Those acids will break down the grout, causing it to become more porous," explains cleaning expert Mary Cherry, owner of Evie's Cleaning Company.

22
Using high-gloss polish on wood floors

young black woman polishing floor
Shutterstock/michaeljung

That polish may make your floors gleam initially, but it will only ruin them in the long run. "Adding polish to your floor will produce build-up and cause your flooring to become dull, and possibly tacky, causing dirt to stick to it," says Cherry, who recommends a pH-neutral cleaning solution instead.

23
Keeping your blinds open all day

woman opening window curtains, property damage
Shutterstock/Africa Studio

Keeping your blinds open may make your home look bright and cheery, but doing so can also cause serious damage to your flooring if you're not careful. "Harsh UV rays can cause premature fading and discoloration to floors, especially hardwood flooring," says flooring expert Paul Carter, executive vice president and chief purchasing officer at Empire Today.

That doesn't mean you have to live in the dark, though—Carter simply recommends making sure you've closed your blinds when you head out for the day.

24
Letting rooms with hardwood floors stay humid

window with condensation on it, property damage
Shutterstock/Alexandra Lande

Want to keep your hardwood or laminate floors looking brand new? The answer isn't some expensive cleaning product—it's a dehumidifier. "If humidity hits above 55 percent, you might be opening up a chance for moisture to seep into the wood," says Carter, noting that this can cause your flooring to swell and warp over time.

25
Sweeping instead of vacuuming

broom and dust - property damage
Shutterstock

What's wrong with breaking out the broom to clean up dirt on your hardwood floors? It can actually shorten their lifespan. "If you're going to mop or sweep, make sure you vacuum first to prevent moving those itty-bitty particles and abrasives—like sand—along the floor's surface, which can scratch or damage floors," says Carter.

26
Using too much water to clean your floors

woman mopping on hardwood floor
iStock

Water may be effective at getting your floors clean, but use too much and you might find yourself in need of some replacement flooring before you know it. Excessive amounts of water on your hardwood or laminate floors can cause them to warp or stain. "If you want to clean your wood floors, use the minimum amount [of water] possible," suggests Alberto Navarrete, general manager of Frisco Maids.

27
Forgetting to use furniture pads on hardwood floors

close-up of legs of chairs on the wooden floor
iStock

Those little furniture pads that cover the bottom of table and chair legs are a must if you have hardwood floors in your home. If you're not using them, every time you scoot back in a chair or move a piece of furniture an inch to the left, you're potentially scratching your floors in a way that only refinishing them can cover up.

28
Using hydrogen peroxide and vinegar together

white hand cleaning with peroxide
Shutterstock/Serenethos

Hydrogen peroxide and vinegar clean effectively on their own, but mixing the two can cause serious damage to your home—and to your health.

According to Lily Cameron, domestic cleaning expert and supervisor for Fantastic Cleaners, "the mixture will create toxic peracetic acid" that can change the color and texture of your soft surfaces or even leave them with visible chemical burns. Worse yet, the acid "can cause you respiratory problems or skin irritation."

29
Cleaning your dishwasher with vinegar

Dish washer with clean dishes
iStock

Vinegar may be effective at cleaning some surfaces, but it's a major no-no for your dishwasher. "Vinegar's acidity can be hard on some rubber parts of your dishwasher," as well as seals made of polyacrylate, fluorosilicone, and Buna-N, eventually causing your appliance to fail, says Cameron.

30
Not cleaning your dishwasher trap

cleaning dishwasher
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Though many people see their dishwasher as a self-cleaning machine, even it could use a little help from time to time. At least once a month, you should be cleaning your dishwasher trap, which is generally located on the lower part of your dishwasher near its sprayer. The rubber gasket and soap holder also need a good wipe down, or else you could be shortening the lifespan of your machine.

31
Hiding your outdoor AC unit

outdoor AC unit surrounded by shrubs
Shutterstock/SantaGig

Your AC system may not be the most attractive element of your backyard, but camouflaging it with hedges can cause major problems. "AC units need plenty of room for proper air flow to run efficiently," says Jeff Trucksa, co-founder of K & J Heating & Cooling, Inc.

32
Adding additional filters to your HVAC system

central air conditioning vent, property damage
Shutterstock

If having one filter on your HVAC system is good, having more than one must be better, right? Well, not exactly. While your HVAC system should have a filter in the air handler, adding an additional one on the AC's vent actually means more stress on the system, says Chris Forbus, owner of HVAC company Choice Air Care. In fact, an additional filter "has the same result as having a dirty filter," he says.

33
Or not cleaning them frequently enough

cleaning air conditioner filter, easy home tips
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While adding extra filters to your HVAC system can cause serious problems, not replacing your existing ones enough can be just as much of an issue. "A dirty or clogged filter will impact efficiency and could even cause damage to your system," says Mark Dawson, COO of One Hour Heating & Air Conditioning, Mister Sparky, and Benjamin Franklin Plumbing. He recommends changing filters every one to three months.

34
Using the wrong kind of extension cord outside

outdoor extension cord on spool, property damage
Shutterstock/Lyudmyla Nikolenko

All extension cords are not created equal. "If an extension cord is not rated for outdoor use, it's at risk of overheating and potentially causing a fire," explains Dawson. So, how can you tell if your extension cord is safe for the great outdoors? The letter W printed on the cord jacket will let you know that it's OK to use outside.

35
Using adaptors on two-prong outlets

overloaded outlet, property damage
Shutterstock/Jeff Liou

Simply adding an adaptor to an older two-prong outlet puts your home at risk every time you use one of these so-called "cheater plugs." "The ground wire is there for safety and simply bypassing it creates a potentially serious hazard," cautions Dawson, meaning it could spark an electrical fire or power surge. Instead, have an electrician replace the offending outlet if you need to use a three-pronged device.

36
Not updating older bathroom outlets

older two-prong outlet
Shutterstock/Adurable Creations

Unfortunately, those antique outlets that came with your house aren't actually safe to keep in your bathroom. "All outlets in the bathroom should be equipped with ground fault circuit interrupters, which can sense when an electric current is improperly grounding and automatically shut down the power," says Dawson. In doing so, this can potentially save you from a serious shock, burn, or electrocution.

37
Putting appliances near your thermostat

middle aged black man using thermostat
Shutterstock/santypan

The placement of your appliances matters more than you might think. Since virtually all appliances emit some heat, if you place them to close to your thermostat, it "can register the rise in temperature and respond accordingly, leading to higher bills in the summer and a colder home in the winter," cautions Dawson.

38
Ignoring flickering lights

young asian man fixing light bulb
Shutterstock/NARONGRIT LOKOOLPRAKIT

Those flickering lights aren't always just a quirk of your older home or the result of a faulty bulb—and letting them go unchecked can mean you're putting yourself at risk for serious danger. "A flickering light could also be an early warning sign of dangerous wiring problems," says Dawson. He recommends first checking that your bulb is screwed in correctly, and replacing it if the problem persists. If that doesn't seem to fix things, it's time to call an electrician.

39
Installing dimmers

white hand turning down dimmer switch
Shutterstock/Vladeep

Creating mood lighting by installing dimmers throughout your house could land you with costly repairs if you're attempting to DIY the job.

"Dimmers typically have different color wires coming off of it and they are not all consistent," explains Garry Hall, a partner at Sunrise Electric. "When wired incorrectly, this will typically result in a short circuit."

40
Not using your stove's exhaust hood

range hood, property damage
Shutterstock/WorldWide

If you're not using your stove's vent hood, you could be compromising the quality of the air in your home. "Be sure to use a vented exhaust fan to remove cooking fumes and avoid moisture build-up," says Richard Ciresi, franchise owner of Aire Serv in Louisville, Kentucky.

He also recommends opening your windows while you cook to allow for cross-ventilation, reducing moisture, smoke, and improving your indoor air quality.

41
Continuing to use malfunctioning appliances

Red toaster, property damage
Shutterstock

That toaster that's always on the fritz and that microwave that cuts power halfway through heating your food aren't as innocuous as they might seem. In fact, ignoring them may mean you're inadvertently damaging your whole home's electrical system. "The resulting damage can range from a tiny bit of wear and tear on other appliances to a destructive electrical fire," says Dawson.

42
Not having your chimney and fireplace routinely cleaned

weird laws
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If you don't have your chimney cleaned with some frequency, creosote can build up inside it, putting you at risk for a chimney fire, as well as resulting in suboptimal indoor air quality. "The routine annual cleaning and inspection of your fireplace and venting system is essential," explains Ciresi. "Dirty, blocked, cracked, and leaking chimney flues and venting can result in the release of fireplace pollution in your home, as can improperly installed or incorrectly maintained components."

43
Power washing your roof

man power washing roof
Shutterstock/Marina Lohrbach

Just because power washing is good for your siding doesn't mean the same holds true for your roof. "If the granule on your shingle roof is blasted off with pressure washing, it'll leave your roof exposed to the elements and weaken your roof," explains James Otis, owner of Hometown Roofing ATX. Over time, this can even puncture your roof and create leaks inside your home.

44
Letting mildew grow on your roof

man looking at moldy roof
Shutterstock/forestpath

While you may think the look of that mossy roof is charming, if there's mildew underneath, you could be setting your home up for some serious damage. "Mold and mildew cause discoloration on your roof and weaken it," says Otis, noting that roof mildew is frequently a sign that something's wrong with your HVAC system.

45
Putting your satellite dish in the wrong place

roofing home damage
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Think the placement of your satellite dish doesn't matter? Think again. Perched in the wrong spot, your satellite dish can easily rip the shingles from your roof or cause damage to your gutters or fascia if it comes loose. In fact, an improperly installed satellite dish may even void your roof's warranty.

46
Leaving pipes exposed in the winter

plumber fixing pipe, property damage
Shutterstock

Those exposed pipes in your freezing cold basement deserve some insulation—and if you don't cover them, you could be putting your home at risk for some serious damage. "Any plumbing that goes through unheated parts of your home or is exposed to outdoors is liable to freeze and possibly burst," says Dawson.

47
Joining the wrong piping materials

young black plumber
Shutterstock/Rawpixel.com

As tempting as it may be, you can't replace that leaky section of pipe with any old material. "Some types of plastic can't handle hot water and there are other materials you shouldn't match," Dawson says. For example, "copper connectors on galvanized metal pipes causes electrolysis," a common source of pipe corrosion and leaks.

48
Flushing trash down the toilet

closeup of woman's hands with yellow gloves using plunger on toilet
iStock

If you're tossing anything other than human waste and toilet paper into your toilet, don't be surprised when you've got a pricey repair on your hands. Doing so "can clog your pipes in a hurry and potentially cause the toilet to overflow in a nasty and hazardous mess," says Dawson.

49
Allowing the ground around your home to dry out

lawn sprinkler, property damage
Shutterstock

You know having too much water around your home's foundation can cause serious damage, but a Sahara-like environment isn't actually any better. "The ground is like a sponge and when it dries out, it shrinks, creating an unstable base for the entire foundation of the home," explains Betty Mooney, president of Brick Restoration, Inc., a Houston-based masonry repair and restoration company. Over time, this can lead to cracks in your home's foundation and may even allow water to seep inside. To keep this from happening, make sure to water the grass and dirt surrounding your home frequently—just not so often that water pools near your foundation.

50
Planting too close to your foundation

women gardening outside
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If you want to maintain the integrity of your home, make sure to leave some space between those pretty perennials and the house itself. Putting plants too close to your home can cause moisture damage to your foundation, or may even leave you dealing with root structures threatening to compromise it.

51
Allowing your garden to get overgrown

wheelbarrow in overgrown garden
Shutterstock/hddigital

An overgrown garden isn't just an eyesore; it's a danger, too. Those overgrown plants can start to advance on your home, increasing your risk of damage from mold and rot, as well as potentially growing onto wood surfaces and weakening them.

52
Placing your grill too close to your house

black family grilling outside, father's day gifts, empty nest
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Who doesn't love grilling in the warmer months? But if you're putting your grill right up against your house, you could be putting yourself at risk. According to the National Fire Protection Association, charcoal and gas grills are responsible for 9,800 home fires in the United States each year. Not only does putting a hot grill near your home increase your risk of a house fire, it can also melt and warp your siding.

53
Not maintaining old windows

Painted windowframe
Shutterstock

Old windows may be charming, but if you're not maintaining them properly with a fresh coat of paint and some new caulk from time to time, you could be causing damage to your home. In addition to being a major source of heat loss, old windows are a common source of lead paint, and opening and closing them can cause dust to spread through your house, putting your family's health at risk.

54
Leaving your attic uninsulated

Old Attic
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While your attic may only serve as storage space, if you're leaving it uninsulated, you're causing damage to your home and to your wallet. According to Energy Star, 25 percent of a home's heat can be lost through an uninsulated attic. So every year you fail to insulate, you're not only increasing your risk of burst pipes and other weather-related damage, but also increasing your electric bills.

55
Adding rooms to your home without getting permits

framing room home damage
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Though it may be tempting to DIY a larger job without securing permits, doing so could mean major trouble in the future. In addition to causing damage to your home, "if the city finds out that you're building without proper permits, they could fine you heavily, shut down construction, or even demand that project be torn down completely," says David Crompton, head of construction at Pro.com. A bad DIY job could also cause structural damage to your home, leading to foundation problems over time.

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