Exterior Foundation Waterproofing in Apex, NC
Stopping water before it ever reaches the footing. Priced for Wake County homes on Creedmoor & White Store Triassic Clay.
How much does exterior foundation waterproofing cost in Apex, NC?
Exterior Foundation Waterproofing in Apex, NC costs $4,200 to $9,500 for a typical home. Exterior foundation waterproofing in the Raleigh area costs $4,000 to $15,000. Crews excavate to the footing, apply a membrane coating, install French drains and footing drain tile, and regrade the lot so runoff moves away from the crawl space.
Apex soil and why crawl spaces fail here
Western Apex crosses into the Durham Triassic Basin, where Creedmoor and White Store clays carry roughly 15% shrink-swell plasticity. These soils expand dramatically when saturated and contract into deep fissures during August drought, cycling lateral pressure against block foundation walls twice a year.
That seasonal cycling produces classic stair-step cracking in brick veneer and inward bowing of crawl space walls. Once the mortar joints open, storm water tracks straight through the wall onto the dirt floor and stays there under an unvented, unsealed crawl space.
Apex's rapid buildout means many neighborhoods are 15 to 25 years old, right at the age where builder-grade 6-mil poly has torn apart and the first structural symptoms surface.
Scope included in Apex
- Excavation to footing depth with membrane or elastomeric coating
- Footing drain tile bedded in washed stone with filter fabric
- Downspout extensions and yard drains routed to daylight
- Positive grading of six inches over the first ten feet
Signs you need this
- Water entering through the block wall, not the floor
- Downspouts dumping beside the foundation
- Negative grade sloping toward the house
Neighborhoods we cover in Apex
Other services in Apex
Exterior Waterproofing in nearby Triangle towns
See the full Apex crawl space guide or the Triangle-wide exterior waterproofing overview.
Exterior Waterproofing in Apex: common questions
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