Our Services
Complete waterproofing and masonry solutions for Long Island homes and businesses.
Interior Waterproofing
Protecting your basement from the inside out
Interior Waterproofing Systems
Professional interior waterproofing systems that capture water before it floods your basement. Designed specifically for Long Island's high water table and unpredictable storm patterns. Our interior systems redirect water safely away from your home's foundation, keeping your basement dry year-round.
Get Free EstimateBasement Waterproofing
Comprehensive basement waterproofing keeps your basement safe and dry while preventing costly water intrusion damage. We serve all of Suffolk County and Nassau County, delivering lasting solutions tailored to Long Island's specific soil and water table conditions.
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Redirects water away from your home and foundation using gravel-filled trenches. Solves hydrostatic pressure problems by preventing water from penetrating your basement floor. Professionally installed throughout Nassau and Suffolk County — a proven, long-term drainage solution.
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Removes accumulated water from the sump basin — an essential component of any basement waterproofing system. We install high-quality sump pumps that prevent flooding and water damage throughout Suffolk and Nassau County. Battery backup systems also available for storm protection.
Get Free EstimateFoundation Crack Repair
Fixes cracks in your building's foundation caused by settling, shifting soil, or water damage. Properly repaired cracks maintain structural integrity and prevent further damage. Don't let a small crack become a major problem — we diagnose and fix foundation issues right the first time.
Get Free EstimateGrated Channel Drain Services
Collects and redirects surface water to prevent pooling on driveways, patios, and walkways. Reduces flooding risk around your home and protects your foundation. Our channel drains handle Long Island's heavy storm runoff efficiently and durably.
Get Free EstimateExterior Waterproofing
Stop water before it reaches your foundation
Exterior Membrane Installation
A waterproof membrane applied directly to your foundation walls keeps your basement dry and your foundation strong. This exterior approach stops water at the source — before it ever contacts your foundation. Ideal for new construction and major renovations across Long Island.
Get Free EstimateFoundation Grading
Proper landscape grading redirects water away from your foundation naturally. If your yard slopes toward your home, water is constantly being directed into your basement. We regrade the soil around your home to solve improper drainage and keep your basement dry without expensive interior systems.
Get Free EstimateWindow Well Drainage
Basement window wells that collect water are a common source of basement leaks on Long Island. We install proper drainage systems that redirect water away from window wells, preventing water collection and leaking into your basement — protecting your investment and your home's interior.
Get Free EstimateMasonry Services
Built to last through Long Island's toughest winters
Paver Services
Custom driveways, walkways, and backyard patios — designed to your specifications and built to last. From classic brick patterns to modern designs, Diamond brings your outdoor vision to life with quality materials that stand up to Long Island's freeze-thaw cycles year after year.
Get Free EstimateStoops
Custom stoops that are safe, beautiful, and durable — whether replacing an old stoop or building brand new. We guarantee a perfect fit for your home's style and scale. Our stoops are built with the precision and craftsmanship that only 25 years of Long Island masonry experience delivers.
Get Free EstimateConcrete Work
New walkways, driveways, and foundations poured with precision and finished with care. Our concrete work holds up to harsh New York winters and heavy use. From simple walkways to complex foundation work, we deliver quality concrete that lasts decades without cracking or settling.
Get Free EstimateRetaining Walls
Holds back soil and shapes your outdoor spaces beautifully. Solves sloped lawn and soil erosion problems. Creates raised garden beds and defined outdoor areas. Built to last with proper drainage and structural integrity — retaining walls that look great and actually hold for decades.
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More ways Diamond protects your home
Dry Wells
Prevents water buildup around your home by capturing and slowly releasing runoff into the surrounding soil. Keeps water moving away from your foundation and reduces flooding risk around your property — particularly valuable on Long Island where high water tables make drainage critical.
Get Free EstimateSill Plate Services
The sill plate connects your home's structure to its foundation, transferring weight and providing stability. We inspect, repair, and replace sill plates to prevent moisture damage and termite intrusion — maintaining the structural integrity that keeps your entire home standing strong.
Get Free EstimateBasement Window Replacement
Hundreds of replacements completed across Long Island. Basement windows are often overlooked, but old or damaged windows are a significant source of water intrusion and energy loss. Professional installation guaranteed — properly sealed and fitted to keep water out and efficiency in.
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Emergency exit windows are required by code in many basement conversions and renovations. Beyond code compliance, egress windows enhance natural light and ventilation in your basement. We handle the full installation process — excavation, framing, window installation, and waterproofing.
Get Free EstimateBASEMENT FLOODING RIGHT NOW?
Don't wait — call us immediately. 24/7 emergency service available.
📞 CALL NOW: 516-920-2543Not Sure Which Service You Need?
Call us or fill out the form. Christopher will assess your situation and recommend the right solution — no pressure, no obligation.
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