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 Savannah 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.
Once the foundation wall is exposed, any existing deteriorated coatings, efflorescence, or cracked parging are removed to create a clean, stable substrate. Cracks in the foundation wall itself are filled and surface-prepped before any waterproofing material is applied. The primary waterproofing layer for most Savannah applications is a rubberized asphalt membrane applied by roller or spray to the cleaned wall surface. This material bonds directly to masonry or poured concrete, bridging hairline cracks and micro-fissures that would otherwise serve as water entry pathways. The membrane is applied in multiple passes to achieve a specified minimum thickness, and the material's flexibility accommodates the minor seasonal movement that occurs in Savannah, NY soil conditions without cracking or delaminating.
Drainage board, sometimes called dimple board or dimple mat, is installed over the cured membrane to create a capillary break between the waterproofed wall surface and the surrounding soil. This profiled plastic sheet holds the soil away from the membrane surface and channels any water that migrates through the soil downward to the footing drain rather than allowing it to accumulate against the wall. The dimple profile creates a continuous air gap that eliminates the direct hydraulic contact between saturated soil and the foundation surface. At the base of the excavation, a perforated footing drain pipe is laid in a gravel bed alongside the footing, collects the water directed downward by the drainage board, and conveys it to daylight or to a sump pit inside the structure.
Seasonal timing for exterior waterproofing in Savannah is often a question homeowners raise during the assessment. While spring and fall are typically optimal in Savannah, NY climates for this type of work, late summer installations are also common and effective when the excavation conditions and membrane cure windows align. We monitor extended forecasts when scheduling exterior projects and build adequate cure time into the project timeline before backfill begins. Winter work is evaluated on a case-by-case basis depending on frost depth, ground conditions, and the urgency of the moisture problem. We are transparent about seasonal limitations and advise homeowners accurately rather than scheduling work that conditions do not support.
Exterior waterproofing represents a significant investment compared to interior drainage solutions, and homeowners in Savannah 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 Savannah 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 Savannah 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.
Our exterior waterproofing work is backed by a written workmanship warranty covering membrane adhesion, drainage board installation, and footing pipe placement.
Every service performed to current waterproofing industry standards.
Our full perimeter packages address every section of exposed foundation wall, ensuring no untreated zones remain that could later become moisture entry points.
Learn moreFor Savannah homes where moisture intrusion is isolated to specific wall sections, targeted exterior treatment of affected areas provides effective protection at lower cost than full perimeter work.
Get an assessmentSurface preparation, crack repair, and re-application of current-generation rubberized membrane over aged original coatings restores exterior protection at a fraction of total foundation replacement costs.
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 Savannah 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 wellsBackfill compaction, surface grade correction to direct water away from the foundation, and landscape restoration are included in our Savannah exterior waterproofing projects.
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 Savannah home.
Excavation depth and width are documented before work begins so the scope is clearly defined.
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.
Real results from real homeowners who chose the permanent solution.
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.
Fair pricing for the scope of work involved. The assessment was detailed and the proposal broke down every line item. No surprises during the project and the crew left the site cleaner than they found it.
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.}
Winter exterior waterproofing in Savannah, NY is constrained by frost depth, ground freeze conditions, and membrane cure temperature requirements. Most rubberized membrane products have a minimum application temperature specification, typically around 40 degrees Fahrenheit, and require the substrate to be above that temperature during application and cure. In mid-winter conditions, achieving this without specialized temporary enclosure equipment is not reliable, and we do not schedule exterior membrane application when conditions do not support proper cure. In early winter before frost depth becomes prohibitive, or in late winter during extended mild stretches, work may be feasible depending on specific site conditions.
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.
We do not quote specific ROI percentages because every home and every market is different. What we do is document the specific risks of continued moisture intrusion in your Savannah home and provide a clear picture of what exterior waterproofing addresses versus what it does not. Homeowners who understand both the protection provided and its limitations are consistently more satisfied with their investment than those who received oversimplified answers.
A site assessment costs you nothing and answers the question definitively. Call JCB Waterproofing and Construction to schedule.
Call +1-866-476-1348 for Assessment