25+
YEARS EXPERIENCE
1,000+
PROJECTS COMPLETED
100+
CLIENTS SERVED
100%
LICENSED & INSURED
WHAT WE DO
Waterproofing & Building Envelope Services
We specialize in keeping structures dry and protected — commercial and residential. From single-family homes to high-rise developments, hospitals to parking structures — our team has the experience to handle any project type or scale. Here's what we do best;
Below Grade Waterproofing
Protecting foundations, basements, tunnels, and below-grade structures from water intrusion. We apply the right system for the soil conditions, water table, and structure type.
Air & Vapor Barriers
Controlling moisture movement and air infiltration through the building envelope. Proper installation of air and vapor barriers is critical to energy efficiency, indoor air quality, and long-term durability.
Joint Sealants
Sealing expansion joints, control joints, and construction joints in concrete, masonry, and curtainwall systems. We selelct and apply the right sealant for every movement and exposure condition.
Traffic Coatings
Durable, waterproof coatings for parking decks, pedestrian plazas, balconies, and mechanical rooms. Designed to withstand heavy traffic while protecting the structural slab below.
Water Repellents
Penetrating silane, siloxane, and siliconate treatments for concrete, masonry, and stone. invisible protection that stops water absorption without changing the look of the surface.
25+
YEARS IN BUSINESS
ABOUT US
25 Years of Keeping Buildings Dry
McNally Construction LLC was built on a simple premise: do the work right the first time. We specialize exclusively in waterproofing and building envelope systems — it's all we do, and we've done it for over 25 years.
With more than 1,000 completed projects and over 100 clients who trust us repeatedly, we've earned our reputation through performance. Whether it's a foundation system on a new high-rise or a traffic coating repair on a parking deck, we bring the same expertise and attention to every job.
Licensed, bonded, and insured
Commercial and residential expertise
Specialists in building envelope systems
Over 1,000 projects, 100+ repeat clients
Detailed scopes and competetive bids
OUR WORK
Project Gallery
WHY MCNALLY CONSTRUCTION?
What Sets Us Apart
We earn our clients' trust by doing what we say, saying what we mean, and never cutting corners.
Quality Craftsmanship
We take pride in every installation. Our work holds up — and holds up to inspection.
Knowledge & Experince
Over 25 years specializing in waterproofing and building envelope systems. We know these systems inside and out.
On-Time Delivery
We set realistic schedules and stick to them. No surprises at the end.
Clear Communication
Regular updates, direct access to leadership, and honest answers when things change.
Safety First
OSHA-compliant job sites. Every worker trained, every project protected.
Local & Trusted
Based in Gilbertsville, PA, serving the Mid-Atlantic region. Most of our work comes from referrals — that says everything.
WHAT WE DO
Have McNally Bid For You
Tell us about your project and we will get back to you to discuss further.
We're Always Hiring
McNally Construction LLC is always looking for motivated, hardworking people who take pride in their craft. If you want to build a career in specialty contracting, we want to hear from you!
Field Installers
Hands-on installation of waterproofing membranes, air barriers, traffic coatings, and joint sealants on commercial and residential job sites across PA, DE, NJ.
General Laborers
Support field crews with material handling, site prep, and cleanup. A great entry point into specialty contracting with opportunities to learn and advance.
Foremen
Lead small crews on active job sites. Strong communication, attention to detail, and experience in waterproofing or related trades preferred.
Estimators
Prepare detail scopes and bids for waterproofing and building envelope projects. Experience in specialty contracting or construction estimating a plus.