Interior Basement Waterproofing Solutions
Stop leaks & protect your home with patented, lifetime-guaranteed systems
Schedule Your Free InspectionWhy Choose Our Interior Systems?
Our expert team installs proven interior waterproofing solutions, spray-applied membranes, peel-and-stick barriers, drainage channels, carbon fiber straps, & more, all designed to keep your basement dry even under the highest hydrostatic pressure.
- Patent-Protected Membranes
- Non-Intrusive Install
- Works Without Power
- Life-Of-The-House Guarantee
- Rapid 2–3 Day Installation
- Mold & Mildew Protection
Our Proven Interior Waterproofing Methods
Spray-Applied Membrane
Seamless, flexible barrier that adheres to walls & floors for total leak protection.
Peel-and-Stick Membrane
Quick-apply panels that form an instant moisture-proof seal on any surface.
Interior Drainage Channel
Hidden perimeter system diverts water into your sump pump before it can pool.
Vapor Barrier & Encapsulation
Complete crawl-space encapsulation to control humidity & prevent mold.
Frequently Asked Questions
How long does installation take?
Most interior systems can be installed in just 2–3 days, with minimal disruption to your home.
Will it work if the power fails?
Yes—our membranes and drainage channels are purely mechanical. Sump pumps can be paired with battery backup for 24/7 protection.
What warranty do you offer?
Every interior waterproofing installation is backed by our Life-of-the-House Guarantee for as long as you own your home.
Ready to Keep Your Basement Dry Forever?
Schedule Your Free InspectionPosted on Linda Matticola Steve came to my house for an estimate to waterproof my house. He was very professional, and was forthright and honest in advising me of the different options I had and how cost effective it would be for me to complete this project or not. He was highly recommended by an independent home inspector who was also very helpful to me as well.Posted on Stephen Hess Very good workers who did a good job. The only problem I have with them is their lack of warranty information and after care procedures having gotten no written information. I have had sump pumps for years and know that there will be failures, at some future date and what do I do in case of emergency??Posted on Neel Trivedi Steve came by to look at some of the issues with my basement. Although he couldn't help due to the way my house was constructed, he gave me some great honest advice and options. He explained things thoroughly and answered all my questions. I highly recommend A1.Posted on Greg Gunther Everyone that my wife and I interacted with from the company were great. I’m horrible at remembering names but I recall Steve, Mike, Tyler, and Raphael. Everyone on the crew worked hard and followed through with what was promised. Recommend to anyone who has moisture issues in their basement.Posted on Olga Dedova Greg and Peter fixed multiple cracks in our basement. They did a great job and were professional, efficient, courteous and very knowledgeable - highly recommended!Posted on Lillie Bryen Mike, Rufino and the crew exceeded expectations. They were efficient and did a great job installing two french drains in our crawlspace. They kept everything clean each day and did a final clean up when they finished. Everything looks great. Greg was our initial contact, he kept us informed of the progress and we had full trust in him and the team. Highly recommend!Posted on Teresa Solano Travis and Mike installed an EZ Breathe vent system in our basement in less than 2 hours. Great service, felt very comfortable having them in our home and appreciated their hard work to remedy our damp basement.Posted on Joel Lieberum Greg came out to diagnose a water issue in my basement. He quickly determined that I didn't need a french drain and gave me some advise on masonry work to fix the problem. Another company had tried to sell me a french drain that I didn't need so I'm grateful that A-1 is an honest company.Posted on george jones A-1 Basement was very professional, knowledgeable, and courteous. They cleaned up every day like they weren’t even there. They remediated my mold in the basement and installed the French drain with two new sump pumps. I couldn’t be more happier how everything turned out! A big thanks to the two crews who preformed the job at my house!! Second to none!!Posted on Victor Patton Mike and Tyler were great. Arrived on time and cleaned up well when they were done. They even took care of some secondary cracks that were not originally scoped in the work. I would go back to A1 and them for future work.Google rating score: 4.9 of 5, based on 319 reviews