Burke, Fairfax County, VA — review of a crawl-space repair plan. The plan specifies a dimpled drainage layer beneath an encapsulation system. It does not document the homeowner’s initial complaint, completed installation, or a water test.
At a glance: The plan covers approximately 210 square feet of crawl space. It lists dimple board at the floor, a 20-mil vapor barrier, insulated wall liner, approximately 60 linear feet of rim-joist insulation, and a condensate pump. The document describes intended materials, not an independently verified outcome.
Why put dimple board beneath a crawl-space barrier?
A dimpled layer can create a space beneath the liner so incidental water can move instead of being pressed directly against the underside of the barrier. But a drainage plane is not, by itself, a complete water-management system. Performance depends on the floor slope, collection point and actual discharge route. The available plan says the layer is intended to aid drainage; it does not show a verified outlet or prove that liquid water was present at this home.
What is different about the vapor barrier and wall liner?
The floor barrier is intended to limit moisture vapor from exposed ground. The insulated wall liner addresses the perimeter walls, while rim-joist insulation addresses the framing band above them. Each component has a different purpose. The repair plan lists these layers, but finished-site photos would be needed to confirm seam sealing, wall terminations and penetrations.
Is a condensate pump the same as a sump pump?
No. A condensate pump moves water produced by equipment such as a dehumidifier. A sump pump is part of a system designed to collect and discharge water from a pit. The Burke plan lists a condensate pump; it does not establish that a groundwater sump or perimeter drain was included.
What cannot be concluded from this plan?
We cannot confirm a standing-water diagnosis, the exact water source, a two-day completed installation, or long-term performance from a repair plan alone. The previously displayed photo was not independently matched to this address and has been removed rather than presented as proof of the project.
Before choosing an encapsulation approach, ask where water would go if it reached the floor and how the installer will document the completed layers. Our crawl-space repair guide explains when a barrier, drainage, insulation or dehumidification may be needed.