Full excavation and rubberized membrane protection that addresses water at its point of entry, before it ever reaches your basement wall.
Exterior foundation waterproofing is the only method that directly interrupts the path water travels from saturated soil to basement interior, and that interruption is made permanent through a combination of membrane application, drainage board installation, and footing pipe placement. The excavation required to accomplish this is substantial, involving the removal of soil from the surface to the footing elevation along the affected foundation sections. For most New London homes, this means a trench four to eight feet deep depending on foundation type and depth, wide enough to allow membrane application and drainage board placement by the installation crew.
After full excavation, the foundation wall preparation phase determines how well the finished membrane performs over time. Our teams in New London remove all loose material, clean efflorescence with appropriate treatments, and fill structural cracks before membrane application. This prep phase is not optional; applying membrane to an inadequately prepared surface creates adhesion failure zones where water can migrate behind the waterproofing layer. The rubberized membrane we specify for New London applications is rated for continuous soil contact and maintains flexibility across the temperature range experienced in New London, WI climates.
The drainage board layer in an exterior waterproofing system does more than protect the membrane during backfill. It functions as a permanent drainage plane that redirects soil water downward to the footing pipe throughout the life of the structure. Without this layer, even a perfectly applied membrane is subject to hydraulic pressure from standing water in the adjacent soil during extended rain events. The dimple board eliminates that pressure by giving water a path away from the wall surface before it can accumulate to pressure-causing depth. In New London, where seasonal soil saturation can persist for extended periods, this drainage plane is a critical element of every exterior waterproofing specification.
Project timing in New London is an important consideration for exterior waterproofing work. The excavation and membrane application phases require periods of dry weather for proper curing, and frozen ground in winter months affects both excavation feasibility and membrane adhesion. We schedule exterior work in New London, WI during the windows of the year when conditions support proper material performance. However, in cases where active water intrusion is causing immediate damage, we assess whether emergency interim measures can stabilize the situation until exterior work can be performed under appropriate conditions. Homeowners who are concerned about a tight window of opportunity should schedule assessments well in advance of their preferred project timing.
Exterior waterproofing represents a significant investment compared to interior drainage solutions, and homeowners in New London reasonably ask whether the cost is justified for their specific situation. The honest answer depends on the source and severity of moisture entry, the foundation type, and the long-term goals for the space. In cases where water is entering through the wall itself due to hydrostatic pressure or deteriorated original waterproofing, exterior treatment addresses the cause rather than managing the symptom. Interior drainage systems are valuable tools in many situations, but they do not treat the wall surface or reduce hydrostatic pressure against the foundation. For homes in New London where the foundation is sound but the original exterior waterproofing has aged out, a re-application of exterior membrane can extend the foundation's protection for decades. We provide assessments that document the actual conditions and recommend the approach best suited to those conditions, not the most expensive option available.
Excavation expertise, proven materials, and a warranty that means something.
Our crews handle complete foundation excavation to footing depth, not just surface-level treatments. Every project in New London is fully exposed before any membrane is applied.
Material quality is the single most important variable in exterior waterproofing longevity. We specify membranes with documented performance in soil-contact applications, not basic coatings.
We stand behind the work we perform in New London with written documentation of what is covered, for how long, and how to make a claim if needed.
Complete exterior foundation protection from excavation through backfill.
Complete excavation, membrane application, drainage board installation, and footing pipe for the full foundation perimeter. The comprehensive solution for persistent moisture intrusion in New London homes.
Learn moreWe document which sections show evidence of active moisture entry and design targeted scopes that address the actual problem areas rather than defaulting to full perimeter work where it is not needed.
Get an assessmentOriginal factory-applied exterior waterproofing coatings on most New London homes from the 1970s through 1990s have reached the end of their effective service life. Re-application restores protection without the cost of a new foundation.
Schedule a reviewThe footing pipe and drainage board are the components that keep the membrane working as designed by eliminating hydrostatic pressure buildup at the wall base.
Learn about drainageBasement window wells in New London homes are a common point of exterior water entry. Proper well drainage, liner installation, and connection to the perimeter footing pipe prevents well overflow from reaching window openings.
Address window wellsProper grading at the completion of backfill is the last line of exterior defense. We verify slope direction and distance from the foundation before leaving every project site.
See full scopeA clear, documented process with no hidden steps.
We evaluate the exterior conditions, identify moisture entry points, and document wall condition to design the right scope for your New London home.
Full excavation to footing depth along affected wall sections exposes the foundation surface for prep and membrane work. All excavated material is staged for controlled backfill.
Each phase is inspected before the next begins to ensure material performance is not compromised by sequencing shortcuts.
Landscape restoration and grade verification complete the project before final documentation is provided to the homeowner.
Words from customers after their first full wet season with exterior waterproofing in place.
We had tried interior drainage twice over the years and always ended up with some seepage after heavy rain. The exterior excavation and membrane work addressed the actual wall surface and we went through the wettest spring in years without a drop of water in the basement. The crew was professional and cleaned up the yard completely.
The excavation was significant work but the team was organized and efficient. They staged the soil carefully, worked methodically around the foundation, and restored the grade correctly at the end. The detailed written scope before the project started meant I knew exactly what to expect at each stage.
The window well drainage connection they added during the project solved a secondary problem I had been ignoring for years. The well used to fill and drain slowly through the window frame during storms. Connecting it to the perimeter footing pipe eliminated that entirely.
No vague promises, just accurate information about what exterior waterproofing delivers.
Excavation disruption is real and should be factored into the project decision. Our assessment walks around the full perimeter to document every item in the excavation zone and note which plants, structures, or materials are at risk. Homeowners who want to preserve specific plantings can arrange for a landscaper to relocate them before excavation begins. We restore the grade and clean the site thoroughly, but landscape features within the trench footprint are unavoidably affected by the process.
Exterior waterproofing and interior drainage address moisture differently and are not always in direct competition. Exterior treatment prevents water from reaching the wall and basement interior by treating the source. Interior drainage collects water that has already entered the building envelope and removes it via a sump system. For wall seepage caused by hydrostatic pressure and deteriorated exterior waterproofing, the exterior approach is superior because it eliminates the pressure and seals the wall surface. Interior drainage alone leaves the wall wet, which accelerates efflorescence, spalling, and in extreme cases structural deterioration over time. For floor-level water entry due to ground pressure below the footing, interior drainage is the appropriate tool.
{Quality exterior waterproofing using modern rubberized membrane systems can protect a foundation for 20 to 30 or more years when properly installed on a well-prepared surface. The original factory-applied bituminous coatings used on homes built through the 1980s typically had a design life of 10 to 15 years under favorable soil conditions. Modern rubberized membrane materials are substantially more durable, maintain flexibility under soil movement and temperature cycling, and retain adhesion over extended periods. The key variable in longevity is surface preparation quality and membrane thickness applied; underprepared substrates and thin single-pass applications consistently underperform.|Longevity depends on the membrane product specified, surface prep quality, and subsequent drainage board and footing pipe function. When drainage board is properly installed and the footing pipe remains clear and functional, the membrane experiences minimal hydrostatic load because water is redirected before it can accumulate against the wall surface. Regular inspection of the exterior grade around the foundation and the footing drain outlet ensures the drainage system continues to function as designed over the years.}
For homeowners with active moisture problems in winter, we evaluate whether interim measures can stabilize the situation until conditions support exterior work. In some cases, temporary interior drainage can reduce immediate water damage risk while the exterior project is planned for spring. We are transparent about what winter conditions allow and advise accordingly rather than scheduling work that conditions do not support.
Landscaping impact is real but temporary for most items. Lawn areas typically recover within one to two growing seasons after backfill and reseeding. Established shrubs that are carefully relocated before excavation can be successfully replanted in the same beds after completion. Large mature trees within the excavation zone require a separate arborist evaluation to determine whether root disruption at excavation depth would pose a risk to the tree's health. We document these considerations clearly during the assessment.
The return on exterior waterproofing investment in New London comes from several directions: prevention of ongoing moisture damage to structural elements, framing, and finishes; reduction or elimination of mold risk that creates both health and remediation costs; increased usable floor area if the basement was previously unusable due to moisture; and improved marketability and buyer confidence at the time of sale. For older homes where the original factory waterproofing has failed, the cost of continued water damage over time typically exceeds the cost of exterior treatment within several years.
Our exterior waterproofing teams are experienced in New London, WI foundation conditions. Call today for an honest assessment of whether exterior treatment is right for your specific situation.
Call +1-866-476-1348 for Assessment