Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →ThatPainter is reader-supported. When you buy through links on our site, we may earn an affiliate commission. Learn More

While there’s no denying that damp walls can be a real pain, there are many preventative steps that you can take to help lower the chances of any dampness from forming.
As an Amazon Associate I earn from qualifying purchases.
Generally speaking, damp walls are most often caused by an excess of moisture in the air, which then reacts with the cold surface of the wall. After this process occurs, condensation forms from the moisture’s warmth against the wall’s coldness, creating damp patches.
Free tools Windows power users keep installed
One-click scans. No signup required.
Whether you’re planning on sprucing up your home and changing the decor in your rooms, or you want to paint over any remnants of dampness and start anew, choosing to paint your walls is one of the easiest ways to make a room look more uniform and welcoming.
#1 Best Overall
- Waterproofing Protection with Nanotechnology: Engineered with advanced nanotechnology to create a powerful water barrier—KILZ waterproofing paint blocks up to 12 PSI of water pressure to help stop water infiltration on concrete and masonry surfaces.
- Interior & Exterior Versatility: Ideal for both indoor and outdoor use—protects basement walls, masonry walls, stucco, brick, concrete blocks, and retaining walls. For below below-grade application, fill all holes/cracks with hydraulic cement prior to painting. Not for use on floors or on walls with active water leaks.
- Resistant & Alkali Resistant Finish: Formulated for high moisture areas, the resistant paint finish also resists alkali buildup, ensuring a long-lasting, decorative, and durable finish that stands up to tough basement and outdoor conditions.
- Low Odor & Easy to Apply: This low-odor formula is easy to apply, dries to the touch in 1 hour, and ready for recoat in just 4 hours. Fully cures in 7–14 days for washable, durable protection.
- Trusted KILZ Quality: Backed by over 50 years of expertise in surface coatings, KILZ products create long-lasting results you can be proud of for many years to come.
Just because you might have walls prone to dampness doesn’t mean you need to forgo painting them.
In fact, besides taking the standard route of ensuring that your home has proper ventilation and you regularly clean the wall prone to dampness, there is paint on the market that can help to prevent dampness and mold from forming!
Therefore, if you are planning on sprucing up your interior walls, I recommend using damp-proof paint, as this type of paint has been specifically designed to help treat walls prone to dampness while ensuring a beautiful, vibrant, and professional-looking paint job.
What are the Three Most Common Types of Wall Damp?
Dampness can be caused by multiple factors that occur outside and inside your home.
Three common types of dampness can occur within walls, and these are the following: penetrating dampness, condensation, and rising dampness.
Rank #2
- 1) Water Based coating for sealing vertical interior and exterior concrete walls. Great for basement walls, foundations and retaining walls.
- Fast Drying waterproof paint for interior/exterior basement walls, cinder blocks, stucco and brick, and masonry.
- High alkali resistance – up to pH-13.
- Waterproofing paint keeps basement walls dry
- Paint only when surface and air temperatures are between 50 ° (10 °C) and 90 °F (32.2 °C).
Condensation is the most common type of dampness that can occur within walls and is the most common of the three types of dampness for stimulating mold growth. Usually, condensation dampness can be caused by exterior-facing walls, which tend to be cold due to the placement.
The easiest way to check if your walls have this type of dampness is by feeling the walls that you think are affected and checking to see if they feel wet. If they do, then this is a strong sign that your walls have condensation dampness.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rising dampness is the next most common type of dampness that can occur within walls.
Rising dampness usually affects walls on the ground floor of a building, as it is primarily caused by water that collects directly around the base/bottom of the foundations.
If your walls are currently being affected by this type of dampness, you will likely notice that there are tide marks located across both the inside and outside of the walls due to the rising dampness.
Rank #3
- ELASTICITY & EXTENSIBILITY: Waterproof coating sealant can smoothly cover small gaps and cracks, effectively resisting deformation of the substrate. Rubber sealant Initial film formation occurs in 2-4 hours, forming a flexible rubber coating that provides lasting waterproof protection
- LONG-LASTING WEATHER RESISTANCE: Professional rubber sealant waterproof membrane remains stable in high and low temperatures (-40 °C to 80 °C/-40 °F to 176 °F). Waterproof coating has good adhesion on multiple surfaces, not easy to crack and effectively resists aging
- ROOF SEALANT WATERPROOF LEAK REPAIR: Waterproof sealant is suitable for metal roofs, sheds, concrete basements, walls, gutters, wooden skylights, flower pots, low-pressure small swimming pools, bird baths, and fountains. Not suitable for walking surfaces due to tackiness when cured
- MAXIMUM COVERAGE AREA AND PERFORMANCE: Concrete foundation vertical surfaces: 0.6 mm thickness covers 2 m² (21.4 ft²), flat/low-slope roofs and standing water surfaces: 1 mm thickness covers 1 m² (10.7 ft²), use polyester fabric at joints and obvious cracks to enhance waterproofing performance
- FLEXIBLE WATERPROOF SEALANT: Foundation sealant waterproof has self-leveling properties and can be applied with a brush, roller, scraper, or poured. It cures quickly to form a dense rubber waterproof membrane, effectively sealing water, gases, and moisture indoors and outdoors to prevent leaks
Usually, walls suffering from rising dampness will usually have stains across the base, as well as the addition of wet patches to the touch.
The third most common type of wall dampness is something that is known as penetrating dampness.
This type of dampness usually occurs when an accumulation of water has built up from the outside of your home, which then permeates its way into your walls.
More often than not, the culprit is usually a broken pipe or gutter, causing water to pool at the base of your home’s walls. On the other hand, penetrating dampness can also sometimes be caused by plumbing issues.
If your walls are currently affected by penetrating dampness, then some of the most common indications are plaster damage, stains, and damp patches.
Recommended Free Tools
Rank #4
- Latex‐Base Mould & Mildew‐Proof Waterproofing Paint
- Guaranteed to stop water‐ resists up to 20 lbs. of water pressure
- Very smooth, bright white, non‐gritty finish applies easily to dry walls with brush or roller
- Ultra low odor, easy soap and water clean‐up
- Backed by two guarantees: 15 year waterproof and 10 year mold & mildew‐proof paint film

How Do You Damp-Proof a Wall Before Painting?
Before you apply your paint, there are a few things that you’ll need to do to ensure that you properly prep your interior walls.
Prevention is often better than correction, so I recommend that you carry out a few precautions before applying the paint to ensure that you get the best results.
Consider the following:
Figure Out the Cause
To properly damp-proof your walls before you give them a new lick of paint, you should be sure to figure out what is causing the existing dampness so that you can properly treat them.
Sometimes, you might be able to determine what type of dampness you are dealing with and the cause. However, the best prevention cure is often to seek the assistance of a professional who can properly diagnose and help you ensure that it does not return.
As soon as you know what type of damp you are dealing with and why your walls have it, you will be able to treat it correctly.
Best Value
- BASEMENT WATERPROOFING COATING FOR MASONRY WALLS - YKF Masonry Pro is a smooth white concrete and masonry waterproofing coating made for basement walls, foundation walls, crawl spaces, and retaining walls. It helps create a protective barrier against moisture and water seepage while refreshing old or stained masonry surfaces.
- 15 PSI HYDROSTATIC PRESSURE RESISTANCE - Engineered for demanding basement and below-grade wall conditions, this coating resists hydrostatic pressure up to 15 PSI when applied as directed to properly prepared masonry surfaces. Use it to help protect porous concrete and masonry walls from moisture intrusion and seepage.
- WATER-BASED POLYURETHANE, HIGH-SOLIDS FORMULA - The advanced water-based polyurethane formula bonds to properly prepared dry or slightly damp concrete and masonry surfaces. Its high-solids decorative finish helps conceal minor surface imperfections and dries to a clean, smooth white appearance.
- BRUSH OR ROLLER APPLICATION FOR DIY PROJECTS - Apply a thick, even coat with a brush or nap roller on vertical masonry surfaces. Each 1-gallon pail covers approximately 100 sq ft, depending on surface porosity, texture, and application thickness, making it suitable for basement wall repair and refinishing projects.
- PREP FIRST FOR BEST WATERPROOFING RESULTS - For best performance, remove oil, dust, loose paint, dirt, and debris before coating. Repair active leaks, cracks, and holes before applying. Allow at least 2 hours before handling, and apply a second coat as needed for full wall coverage.
Treat the Walls
As soon as you have figured out what it is that’s causing the dampness, you can proceed to treat it.
The type of treatment required will greatly depend on your personal circumstances. However, one of the most common ways that dampness is treated is via waterproofing the walls and correcting the route of the problem, such as cleaning out blocked gutters.
In addition, another way that your wall dampness may need to be treated is by ensuring that your home has proper ventilation. As always, if you’re unsure how to treat your dampness, I recommend you go to a professional contractor who can properly guide you.
The Tool Desk
Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Deal with Existing Damage
After treating your walls from dampness, the last step you’ll need to take to ensure that it has been damp-proofed is to patch up any damage.
Damp can sometimes cause cracks and holes within the walls, so you must ensure that all of these things have been repaired before painting and sanding down to ensure the paint will apply smoothly.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallOutdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchJim Bettesworth well known for his can-do attitude and often takes jobs other companies were unwilling or unable to do. Experienced and educated in concrete construction and painting jobs. Read More.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors




