Business Details
Your Trusted Partner for Basement Waterproofing Solutions
ACM Basement Waterproofing has been a trusted family-owned and operated business serving Long Island for over two decades. Specializing in basement waterproofing, foundation repair, and crawl space solutions, we combine industry expertise with personalized service to address unique homeowner needs. As certified members of the Basement Health Association and recipients of the BHA Star Award, we uphold rigorous standards of excellence.Our team delivers customized, minimally invasive solutions using proven methods like French drains, sump pumps, and carbon fiber reinforcement. With an A+ Better Business Bureau rating and no consumer complaints in Nassau and Suffolk Counties, we prioritize transparency, reliability, and customer satisfaction. Every project includes free inspections, warranties, and a commitment to leaving properties cleaner than we found them.
Services
Basement Waterproofing
Foundation Repair
Crawl Space Waterproofing
French Drains
Sump Pumps
Egress Windows
Carbon Fiber Reinforcement
Window Well Drains
Battery Backup Systems
Mold Remediation
Highlights and features
- Over 20 years of specialized experience in Long Island waterproofing
- Certified by Basement Health Association with Star Award recognition
- Customized solutions for unique foundation and soil conditions
- A+ Better Business Bureau rating with no consumer complaints
- Battery backup systems for uninterrupted protection during power outages
Associations and certifications
- Basement Health Association
- Certified Waterproofing Specialist
What people say
Completely dry basement
Professional crew
Knowledgeable staff
Timely completion
Spotless cleanup
Services
Basement Waterproofing
Our basement waterproofing systems use interior French drains, sump pumps, and vapor barriers to permanently eliminate water intrusion. We address Long Island's unique challenges like high water tables and coastal storms. The process includes inspection, trenching, pump installation, and concrete restoration, ensuring dry basements for decades.
Foundation Repair
We specialize in fixing foundation cracks and bowing walls using carbon fiber straps and wall anchors. Our minimally invasive techniques reinforce concrete and block walls against hydrostatic pressure. The process includes structural assessment, crack injection, and installation of support systems to restore foundation integrity.
French Drains
Our interior French drain systems channel groundwater away from foundations using perforated pipes and gravel trenches. Installed beneath basement floors, they connect to sump pumps for automatic water removal. The system includes weep holes for pressure relief and high-strength concrete covering for seamless integration.
Crawl Space Repair
We address crawl space moisture issues through encapsulation, drainage mats, and vapor barriers. Our process includes structural reinforcement for sagging floors, mold remediation, and ventilation control. The goal is to create dry, energy-efficient crawl spaces that protect indoor air quality and home value.
Sump Pump Installation
We install primary and battery backup sump pumps in basements and crawl spaces. Our systems include submersible pumps, check valves, and discharge lines that direct water away from foundations. The installation process ensures proper pit placement, automatic operation, and integration with existing drainage systems.
People
Mark McAlpin
Owner
Mark McAlpin, owner of ACM Basement Waterproofing, brings decades of hands-on experience in waterproofing solutions. He personally oversees inspections and estimates, ensuring accurate diagnoses and tailored recommendations. Mark's commitment to quality and customer satisfaction has earned ACM multiple industry awards and a 2000+ job track record with zero consumer complaints.
Questions
How long does basement waterproofing installation take?
Most projects complete in 1-3 days depending on complexity and size.
Can you waterproof finished basements?
Yes, we install systems in finished basements without damaging existing finishes.
Do systems work during power outages?
Battery backup sump pumps maintain protection during electrical outages.
What warranties do you offer?
We provide strong warranties on all installed waterproofing products and workmanship.
How do you handle crawl space issues?
We combine structural reinforcement with targeted waterproofing solutions for crawl spaces.