Crawl space waterproofing starts with where the water comes from.
Crawl space waterproofing means stopping liquid water from getting into the space and the foundation around it. That is different from managing humidity. Water arrives through the ground, through walls and footings, and along the surface after heavy rain, and each path needs its own fix.
The Crawlspace Guy works out the source first, then chooses the interior or exterior approach that fits your home. Homes in the Roanoke Valley sit on everything from flat lots to steep hillsides, so no two waterproofing plans look exactly alike.
Four common ways water gets under a home.
Roof and lot drainage
Downspouts that empty beside the foundation and soil that slopes toward the house send a lot of water exactly where you do not want it.
A high or rising water table
After long rain the ground around the footing can stay saturated, pushing water up through the floor and joints.
Cracks and porous masonry
Water finds cracks, gaps around pipes and seams in block or stone walls, and shows up as staining, damp patches or drips.
Two ways to waterproof, and when each fits.
Interior waterproofing
Works from inside the crawl space. Water is collected with interior drainage, directed to a sump pump and sent out, while the walls and floor are sealed. It is often the cleaner option when the outside of the house is hard to reach or landscaped. See French drain installation and sump pump work.
Exterior waterproofing
Works on the outside of the foundation: grading, gutters and downspout extensions, and drainage at the footing. It stops water before it reaches the wall, and it is a good fit when runoff is the main cause.
Many homes need a mix. After the water is under control, most homeowners add crawl space encapsulation to finish sealing the space.
Read before you compare quotes.
Waterproofing quotes can look far apart when they cover different work. Our guide to crawl space waterproofing cost explains what moves the number, and why the right waterproofing contractor matters covers what to ask before you hire.
We serve Salem, Roanoke and nearby, and you can start with a call to The Crawlspace Guy.
Diagnosis first
We look for the cause before recommending anything, so you are not paying for a fix aimed at the wrong problem.
Scope explained
John explains what is included in plain language, so estimates can be compared fairly.
Common questions about this service
What is the difference between waterproofing and encapsulation?
How do I know if my crawl space has a water problem or a humidity problem?
Can gutters and grading really cause a wet crawl space?
Do I need a sump pump in the crawl space?
Need crawl space waterproofing?
Describe what you see under the house. We will find the source and give you a free on-site estimate for the right fix.