Total Basement Finishing 
in Portsmouth, NH

Click to see why people hire us

Your local basement finishing and remodeling company in Portsmouth, NH is Total Basement Finishing, A Blackdog Affiliate

Contact Us For
A Free Estimate!

Waterproof & Mold Resistant Products 
for Remodeling Your Basement

You want a beautiful, finished basement; BUT you also want it to last. New Hampshire experiences an average of 17 floods each year, which result in basement water damage in homes throughout the state. Most companies use traditional building materials like wood, fiberglass or drywall that are vulnerable to water damage and mold growth.

Don’t spend thousands of dollars on your basement project only to have to redo it after water damage! Choose from our beautiful, waterproof materials for a perfect basement that will last.

How We Solve the Problem

  • Waterproof, Washable Basement Walls
  • A Wide Variety of Thermal Basement Flooring
  • No-Sag, mold resistant Basement Ceiling
  • Basement Staircases & Full Basement Bathrooms
  • Energy-Efficient, Double-paned, Basement Windows
  • Glass French doors, bi-fold doors, louver doors, and      six-paneled steel doors
  • Energy-Efficient Basement Lighting
  • Written Warranties on Products | Financing Available

Mold Damage in Portsmouth, NH

Mold & Water Damage

Water finds it way into your home’s foundation, whether this be in a flash flood or moisture seeping through the concrete over time. The real problem occurs when the water or moisture comes in contact with organic materials like wood, plywood, carpet, tiles, fiberglass, and even products like “mold-resistant” drywall. Water in the basement means mold and rot will begin to grow and the drywall may need to be restored and repaired, but more likely, your beautiful Portsmouth basement will need to be completely gutted.

Advantages of our Basement Materials

Beatiful Basement Flooring in Portsmouth, NH

To prevent water damage to your basement, we install a water drainage system and then finish your basement using materials that are waterproof and truly mold resistant. Our materials look just like wood and tile but are not organic and not susceptible to mold. Our materials are also easily washable. You don’t need to search for studs in order to hang items on the wall, as our panels support up to 300 lbs! Each of the panels is built with an unbroken sheet of insulation inside and the floor panels have raised pegs keeping them off the concrete. This completely insulates your basement.

Waterproof Basement Walls in Portsmouth, NH

Our Company serving Portsmouth

For years, Total Basement Finishing has been recognized as an industry leader in basement finishing and remodeling. This recognition comes from our dedication to quality, responsibility, and integrity – to doing the right thing at all times. We do the work we do because we not only want it to look great but to last as long as the house.

Unlike other companies in Portsmouth, NH that just install basement wall panels or flooring – we do it all. From removing old walls, to installing drainage systems, to finished flooring – we are your one-stop source for all your basement finishing needs. To see the whole process of what we can do, watch this video. We help you transform the entire basement into the perfect living space. Let us be your partners in your basement remodeling project.


Service Area Zip Codes:


Recent job requests for basement finishing in Portsmouth, NH:

Project Location: Portsmouth, NH 03801

Comment: Our house has a basement from 1850 and the basement reflects that. I don't even know what we can do to refinish the basement, but hoping to get ideas and an estimate.

Project Location: Portsmouth, NH 03801

Comment: Needed to finish the basement

Project Location: Portsmouth, NH 03801

Comment: Hello, We have a mixed type foundation: field stone, brick and cement. There are cracks that allow small animals and water to get in. Looking to improve the quality of the basement and if possible make it a usable space. Evenings and weekends work better for me but I can support days with enough notice. Looking forward to hearing from you. Thanks, John

Project Location: Portsmouth, NH 03801

Comment: My basement is just over 6 feet high, but I want to fix it up as much as possible as a laundry room, play room, bathroom. Do you work on basements with low ceilings?

Project Location: Portsmouth, NH 03801

Comment: Finish an unfinished damp basement

Project Location: Portsmouth, NH 03801

Comment: Need a fairly basic basement finish.

Project Location: Portsmouth, NH 03801

Comment: We have a 10' x 26' room that we'd like to re-finish. The ceiling height is low (less than 7').

Project Location: Portsmouth, NH 03801

Comment: Very interested in speaking with someone regarding a quote for a basement refinish. -Thank you

Project Location: Portsmouth, NH 03801

Comment: Install/Replace/Remodel, Flooring/Carpeting

Project Location: Portsmouth, NH 03801

Comment: I have rented a "garden level" retail space that currently has a painted concrete floor. I'd like to have some flooring put over the concrete, however, it looks like the unit has had moisture issues in the past. Please advise.

Project Location: Portsmouth, NH 03801

Comment: We are looking to refinish our basement, creating a 20 x 22 room. Our basement has been professionally waterproofed already.

Our Products
Finishing Ideas
Learning Center
Become a Dealer
Free Estimate