How to Fix Basement Moisture

  • Reduce Seepage Around Basement.
  • Fill Large Cracks in Foundation Walls.
  • Seal Outside of the Foundation Wall.
  • Apply a Masonry Waterproofer.
  • Install a Sump Pump.

How do I reduce moisture in my basement?

5 Tips to Reduce the Humidity Level in Your Basement

  1. Open the Windows. A great way to get air circulating in the room is to open up the windows whenever you’re down there. …
  2. Keep It Clean! Storing too many items in your basement will create clutter. …
  3. Seal Up Any Gaps. …
  4. Turn Up the Heat. …
  5. Get a Dehumidifier.




Why is there so much moisture in my basement?

Basement condensation occurs when warm, moist air comes in contact with your cool basement walls and floor. As the walls cool the warm air, moisture is created, just like condensation on a cold beer on a hot summer day.

How do I get moisture out of my basement without a dehumidifier?

How to Keep Basement Dry Without a Dehumidifier

  1. Set Houseplants Near Windows. …
  2. Hang Baking Soda In Plastic Bags.
  3. Use Fans in the Room. …
  4. Purchase Carpeting Mats. …
  5. Place Damp Rid in Your Basement. …
  6. Install a Vent Fan. …
  7. Add Extra Drainage and Waterproofing.

How do I stop my basement walls from sweating?





Add Insulation

You can also reduce condensation by making cold surfaces warmer. Air-sealing prevents cold air from getting in and keeps the basement interior warmer. Insulating basement foundation walls creates a thermal barrier between the cold wall and relatively warm interior air.

Should you run a dehumidifier in the basement all the time?

The level of humidity in a basement should perform just enough to keep humidity at a safe level. Basements are more exposed to a constant source of moisture from the external environment; therefore, your dehumidifier should run very frequently. Molds tend to become a problem at a relative humidity of 60% and above.

Is dehumidifier good for a basement?

Whether you’re dealing with a muggy basement, a humid laundry room, or another damp area in your home, a dehumidifier can help guard against mold and mildew. It can also make the space more comfortable.

Should I get a dehumidifier for my basement?



The Basement Health Association warns that relative humidity levels above 80 percent in basements causes mold and mildew to develop. Using a basement dehumidifier to keep humidity levels below 50 percent can prevent mold and mildew growth, protecting indoor air quality and preventing damage.

Why do basement floors sweat?

SSS happens from moisture that accumulates from the difference between the inside air temperature and the floor temperature. When the air vapor cools down and matches the floor temperature, condensation forms on the concrete, this is also known as concrete sweating. Safety is a top concern for all businesses.

Is it normal for basement walls to sweat?

It’s actually a fairly common issue. The exposed concrete in most unfinished basements can experience condensation, which people often mistake for water seeping through the walls. The water comes from introducing warm, moist air to the earth-cooled surface of the concrete.

Why are my basement walls sweating in winter?



Basement condensation can present itself in a number of ways, but it typically occurs as tiny water droplets covering the surface of your basement’s walls or floors. It occurs when warm, moist air hits the cool foundation walls.

Should you put a vapor barrier on basement walls?

Building codes usually require a vapor barrier (4 mil plastic sheeting) on exterior basement walls if the framing is attached to masonry or concrete surfaces, or if the wood framing butts up against the outer basement walls.

Can you use Tyvek on basement walls?

However, on your basement wall, there doesn’t appear to be anything that would allow trapped moisture to escape. Tyvek and other house wraps are different in that they block liquid water, but not water vapor in the air, from passing through. This allows the walls to breath and prevents trapped moisture.

Do basement walls need to breathe?

Nowadays, houses are sealed up tight as a drum. It’s great for energy efficiency and your heating bill. But it’s bad for any moisture hiding in your home that can’t find its way out. That is why your walls need to breathe.

Which product is best to create a moisture barrier in concrete or masonry basement walls?



The best moisture barrier, however, is rigid foam which is sealed with spray foam around the bottom and corner gaps of the walls. Other options include 6mm poly sheets and exterior wraps like Tyvek.

Is Tyvek a moisture barrier?

No, DuPont Tyvek® is not a vapor barrier. It is made with unique material science to keep air and bulk water out while allowing moisture vapor inside walls to escape.

Where should I put moisture barrier in basement?

Building experts recommend installing vapor barrier in a basement against the foundation walls before placing studs and insulation.

  1. Pull the barrier tightly across, and cover large surfaces as flatly as possible.
  2. Make sure not to tear or cut the material.