Winter's coming, and fast. Is your home prepared to handle the snow, ice, and freezing temperatures it brings along with it?
Homes are particularly susceptible to water infiltration in the winter. This can happen during warmer months because of heavy rain, but in winter, it occurs because of the freeze-thaw cycle and hydrostatic pressure instead.
You might be wondering about the specifics of how winter moisture creeps into basement walls, the damage it can cause once inside, and how to prevent it. Let's explore.
How Moisture Enters Basement Walls
Moisture's journey into your basement during winter is a bit different than in other seasons. As mentioned, the main culprits are the freeze-thaw cycle and hydrostatic pressure, which work together to create problems for your foundation.
The Freeze-Thaw Cycle
When water gets into the soil around your foundation, it expands as it freezes. This expansion puts immense pressure on your basement walls. As temperatures rise above freezing, the ice melts, and the pressure eases.
This constant cycle of expansion and contraction can create new cracks in your foundation or widen existing ones. These cracks become entry points for water. When the snow on the ground melts or rain falls, that water can seep directly through these openings into your basement.
Hydrostatic Pressure
Hydrostatic pressure is the force exerted by water that’s accumulated in the soil. During winter, heavy snowfall followed by a thaw can saturate the ground around your home. Your basement acts like a boat in a pool of water, with pressure pushing against the walls from all sides.
This consistent pressure can force water through even the tiniest pores and cracks in the concrete. The pressure is most intense at the base of your foundation walls, which makes the joint where the wall meets the floor a very common spot for leaks.
Moisture Damage Issues
Once moisture gets inside your basement, it can lead to a host of problems that are more than just inconvenient. The damage can affect your home's structure, your health, and your wallet.
Structural Damage
Water that seeps into concrete walls and then freezes can cause the concrete to spall, which is when the surface flakes or peels away. Over time, this weakens the wall's integrity. Water can also corrode the rebar within your concrete walls, which further compromises the foundation's strength.
Mold and Mildew Growth
Basements are often dark and have limited airflow, which creates a favorable environment for mold and mildew. These fungi thrive in damp conditions and can grow on walls, floors, and any organic material stored in the basement, like cardboard boxes or wooden furniture.
Mold releases spores into the air, which can spread throughout your home and lower your indoor air quality. For people with compromised immune systems or conditions like asthma or allergies, mold exposure can also trigger severe respiratory issues, and in rare cases, it can lead to fungal infections like aspergillosis.
Damaged Belongings
If you use your basement for storage, any items you keep there are at risk. Water can ruin furniture, electronics, documents, and sentimental items. The cost to replace these belongings can add up quickly, and some things are irreplaceable.
Unpleasant Odors
A damp basement often develops a musty, earthy smell. This odor is a byproduct of mold and mildew growth, which can irritate your respiratory system, and the unpleasant smell can permeate your entire house. Musty odors are a clear indicator your home has moisture problems that you need to promptly address.
How To Prevent Basement Moisture
You can take action to keep your basement dry and protect your home from water damage during the winter months. The following methods focus on managing water outside your home before it has a chance to get in.
Improve Drainage
Proper drainage is your first line of defense against moisture. Your gutters should be clean and free of debris so they can effectively channel water away from your house. Gutter downspouts should extend at least five feet from your foundation to direct rainwater and snowmelt to a spot where it can drain without pooling near your home.
You should also check the grading of the soil around your foundation. The ground should slope away from your house, not toward it. If the grading is incorrect, you may need to add soil to create a positive slope, which helps water flow away naturally.
Repair Cracks
A thorough inspection of your basement walls and floor for any visible cracks is a very direct way to stop water. You can seal small cracks with a polyurethane or epoxy injection. This creates a flexible, waterproof barrier that keeps water out. Address these cracks before winter begins—if you wait, you risk freezing temperatures expanding minor fissures into major problems, and applying sealants becomes far more challenging and less effective in the cold.
For larger cracks or more serious foundation issues, you may need to consult a professional. They can assess the extent of the damage and recommend a more robust repair solution.
Install a Sump Pump
A sump pump is a device installed in a pit in your basement floor. It collects groundwater that would otherwise seep into your basement. When the water level in the pit rises, the pump automatically turns on and discharges the water away from your home. A sump pump offers reliable protection against flooding and high water tables.
Waterproof Your Basement
For maximum protection, you can waterproof your basement walls. The most common waterproofing method involves applying sealants to either the interior or exterior walls to block moisture. You can also use a waterproof membrane to create a barrier that prevents water from seeping through the walls.
Keep Your Basement Dry This Winter
Winter moisture can creep into your basement walls and cause all sorts of issues that can be time-consuming and costly for you to have repaired.
If you want to keep moisture out of your basement to begin with, Advanced Basement Solutions sells waterproofing membranes for walls that provide a durable shield against water intrusion. These flexible sheets firmly attach to interior or exterior basement walls and physically block all liquid water molecules and vapor from entering your home. Give your basement a protective barrier against moisture this winter by shopping our membranes today.