- +1 (603) 235-9598
- joe.m@nh-dry.com
- Barrington, NH 03825
- Mon - Sun 7:00 am - 7:00 pm
We handle basement waterproofing, drainage systems, and sump pump installation so you get a dry, usable space without worry, typically completed within one week.
Trusted by Local Families
The water pooling on your floor. The damp smell that never goes away. The sump pump running constantly but doing nothing to keep things dry. You can see the stains spreading, feel the humidity in the air, and worry about mold taking hold.
The longer water sits, the worse it gets. Foundations crack. Concrete flakes. Repair costs climb. And every storm brings the same problem back, stealing your peace of mind and threatening everything you store below.
NH Dry Basement LLC handles basement waterproofing, crawl space drainage, and vapor barrier installation for Portsmouth homeowners who expect honest work and long-term results. Since day one, we’ve been a family-owned outfit focused on keeping foundations dry, not on upselling.
Our team specializes in sump pumps, battery backups, dehumidification, and full encapsulation. Whether it’s perimeter drainage, crawl space ventilation, or concrete slab prep after removal, we bring the tools and the experience to fix moisture problems the right way.
We show up on time, explain every step, and stand behind the work. When you need a dry basement and a crew that treats it like their own, you’ve found the right team for Portsmouth.
Homeowners dealing with foundation leaks get perimeter drainage, sump pumps, and vapor barriers that stop water intrusion for good.
No puddles, no dampness, just a basement or crawl space ready for storage or finishing.
Less humidity and moisture means fewer mold spores circulating through your home's ventilation system.
Water damage stops before it weakens your foundation walls, floor joists, or structural supports.
Our basement stayed dry through the last two major storms, something we haven’t been able to say in years. The crew walked us through every step, answered all our questions, and cleaned up after themselves every single day. The new drainage system and sump pump have given us real peace of mind.
They fixed a crawl space drainage problem three other contractors said was too complicated. The difference in our air quality upstairs is noticeable.
We have 100+ 5-star reviews on
So you can stop worrying about the next storm and start using your basement the way you planned.
We inspect your foundation, measure moisture patterns, identify leaks, and explain what is causing water intrusion in plain language.
You receive a detailed scope showing drainage routing, sump placement, materials, timeline, and total price before any work begins.
Our crew installs the system, tests all pumps and drains, cleans up debris, and walks you through operation and maintenance.
Every job starts with a detailed plan before tools arrive.
Vague estimates and unclear project scope.
Same experienced crew handles your project from start to finish inspection.
Different workers showing up each visit.
Proper materials and clean installations you can inspect yourself.
Shortcuts taken where you can't see.
Jobs completed on schedule without excuses or delays.
Timelines that stretch week after week.
Written guarantees that protect your investment for the long term.
Warranties that quietly vanish over time.
Complete inspection before we touch a shovel or lay pipe
With Us
Surface fixes without testing moisture source
With Them
Drainage channels placed at footers with graded aggregate and sealed liners
With Us
Quick patches that fail within two seasons
With Them
Written coverage on sump pumps and vapor barriers you can transfer
With Us
Verbal promises that vanish after payment clears
With Them
Itemized quotes showing pump specs, liner thickness, and labor hours
With Us
Vague estimates with hidden upgrade fees later
With Them
Battery backup testing and dehumidifier calibration before we pack up
With Us
Crew leaves before checking if systems actually run
With Them
We slope surfaces and install drainage to move water away from your foundation before it causes problems.
Vapor barriers are installed with overlapped seams and secure fastening so moisture stays out of crawl spaces permanently.
We size sump pumps correctly and add battery backups so your basement stays dry even during power outages.
Every waterproofing system is installed with attention to detail, leaving your property tidy and the work built to last.
We install dehumidifiers and ventilation systems that control humidity levels and prevent mold growth in basements and crawl spaces.
Concrete, polyethylene liners, and drainage pipes are selected for long service life in wet conditions without frequent repairs.
From waterproofing to drainage systems, we handle moisture control across the region. Every job uses materials chosen for New England’s freeze-thaw cycles and heavy spring runoff.
Most projects start within one to two weeks once permits clear and materials arrive. Scheduling depends on weather and the size of the job.
Yes. We pull all required permits and handle inspections so the work meets code. You stay informed but you don’t chase paperwork.
Our systems include a written warranty. If water shows up again we return to diagnose and fix the issue at no charge during the warranty period.
Often yes. Interior drainage channels and sump pump installation can protect the space without gutting walls. We assess the layout first and recommend the least invasive approach.
A standard interior perimeter drain and sump pump usually takes two to three days. Larger jobs with vapor barriers or exterior excavation may run four to five days depending on access and soil conditions.
Reach out to NH Dry Basement LLC for expert basement waterproofing that protects Portsmouth foundations, keeps crawl spaces dry, and delivers real long-term peace of mind.
