Below Floor Drainage System in Progress
Compact Sump Liner
Here we have located a compact 12” square PVC box liner that is 24” deep. The installation is compact enabling a solid 12” cover (not shown) to be fitted flush with the floor. In this case, we were able to remove and reinstall the bookshelves over the pump location and the homeowner did not lose an inch of floor space as a result. Neatly plumbing the discharge behind the paneling hides everything from plain sight yet the pump is accessible for testing or maintenance simply by folding a small flap of carpet back revealing the cover. An elegant solution. Also shown is a 4” channel grate which catches any water that possibly pushes in around the basement door eliminating the need to remove and replace the exterior door.
Basement Waterproofing Nationwide has identified and employed thousands of effective, permanent solutions utilizing a “bubbler pot” product. This hearty, solid PVC basin is set flush with the ground. Water is hard-piped from the downspout to the pot and water ‘bubbles up’ flowing passively onto the grass at the termination point. Each drain is custom designed for the elevation, pitch and landscape details of your yard. Multiple downspouts can be routed to one pot including the discharge of your basement.
This cement block home in Newark, DE was waterproofed using a Below Floor Drainage System including a sump pump as well as a high performance, vinyl wall board to control moisture and seepage through the walls. The combination of these two effective waterproofing systems by Basement Waterproofing Nationwide are guaranteed for the life of the structure regardless of ownership. (See warranty for details.)
Below Floor Drainage System with Vinyl Wall Board
Improving a Finished Basement with Vinyl Wall Board
Stairway Drains and Channel Grate Drains
Basement Waterproofing Nationwide uses high capacity box drains in these applications to yield permanent results. In this case size definitely matters and a 12” box drain is the right size for nearly any stairway drain problem. The grated cover is anti-clog providing enough surface area to catch even the largest volume of water Mother Nature can throw at it. The drain is hard-plumbed into the sump pit for removal outside. Very often it is appropriate to install a channel drain on the interior of the door both as a backup system as well as to avoid replacing the basement door should there be a sealing problem around the door and it is not convenient to replace the door at this time.
Window Well Drain
- There are footing drains present
- That these supposed drains are in working order
- That the excavation to these drains will not compromise them down the road.
We find that approach to be fraught with difficulties. BWN prefers to positively control the flow of water plumbing it directly into the sump pit by means of these custom drains. A cement floor can be poured at the base of the well making clogging less likely and facilitating easy cleaning of leaves and debris. An atrium drain allows for the water to continue to drain even in the presence of moderate leaves or debris.
- The cost of construction is less. Less excavation, less foundation materials, less finish (typically no cement floor.)
- Often in a multi-level home or where the designer wishes to employ a recessed or sunken living room, for example, that portion of the foundation will necessarily be recessed into even a full basement creating a crawlspace.
- High water table
- Preponderance of rock or ledge
- Other stability concerns
In any event, most crawlspace foundations are substantially different in environments posing unique challenges.
- Less use leads to less conditioning of the air
- Lack of proper cement floor can lead to increased humidity
- Lack of appropriate finishes on the foundation wall interior also leads to greater moisture content
Often Crawlspace encapsulation is a good solution. Here we encapsulate the floors and wall of the crawlspace with a durable and permanent barrier preventing moisture and other contaminants easy access into the crawlspace itself. Once encapsulation is performed correctly we can add a dehumidifier to this space thereby lowering the moisture level and effectively limiting the growth of microorganisms.
Other benefits of Crawlspace Encapsulation include:
- Water control
- Barrier to insects
- Creates a clean and attractive space where you can store items safely
- Brightens the crawlspace
Complex Dewatering Systems
- Standing or ‘ponding’ water on a property
- Run-off water (surface) causing erosion and other nuisance issues
- Actual penetration of water to an at or above-grade structure due to either of the above.
When there is a source of surface water runoff that threatens the viability of a building’s use or is simply a nuisance, De-watering systems of various complexities can be employed. The purpose of these systems is to attract, direct and remove the water in question to a more suitable location. Often a Complex De-watering system is used in conjunction with a waterproofing membrane to achieve a measurable result because of the layering of multiple waterproofing approaches.
- Settling – Here a foundation moves downward as a result of unstable soils, erosion or premature loading of a foundation.
- Lateral pressure – Here the ground on the outside of a foundation exerts pressure on the wall beyond the wall’s ability to withstand causing fractures. Often this type of failure can be the result of improper materials (8” block as opposed to 12” block for example). Additionally backfilling too early (before the concrete reaches its tensile strength) can lead to these cracks. At times excessive sudden or gradual mechanical compaction of the ground (think big truck close to the wall or large bush growing into a larger tree) on the outside can be the source of this pressure.
Repairs to a crack in a foundation vary based on
- Type of foundation
- Size and direction of the crack
- Whether the crack is leaking or not
- Displacement of the foundation
Crack Repair Solutions
BWN has several proven methods for repairing your cracked foundation.
- Epoxy injection
- Carbon-fiber staples and wall straps
- Urethane injections as a waterstop
- Structural piers within an existing cement block wall
- Steel I-Beams
- Cosmetic surface seal
A detailed inspection will reveal the appropriate solution for you.