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Products & Services
Radon Mitigation
Radon Testing
Radon Detection
Radon Abatement
Radon Mitigation System

Basement Repair Services & Products
WaterGuard Interior System
DryTrak Drainage Channel
TrenchDrain Drain Grate
IceGuard Discharge Line
FlexiSpan Wall Crack Repair
Polyurethane Crack Sealing
WellDuct Window Drainage
BrightWall Waterproof Panels
ThermalDry Wall Barrier
Basement To Beautiful Pre-finishing Wall Insulation Panels
Drain Tile Installation
SuperSump Pump System
TripleSafe Pumping System
UltraSump Battery Back Up
Sanidry Dehumidifier

Foundation Repair Services & Products
Push Pier Underpinning For Settlement, Foundation Leveling, Sinking Foundation Repair
Geo-lock Wall Anchors
Geo-lock Helical Anchors
PowerBrace Bowed Wall Repair
CarbonArmor Fiber Wall Repair
SmartJack Crawl Space Support
Slab Pier Repair
PolyLevel Concrete Lifting
EZ Post Deck Repair
Shotcrete Wall Restoration

Before and After Pictures from Hollis
Radon and Sump Pump, Hollis, NH

Radon and Sump Pump, Hollis, NH

Before After
Radon and Sump Pump, Hollis, NH Radon and Sump Pump, Hollis, NH

This homeowner had concerns with high radon levels and a high water table. Our team installed a radon mitigation system, as well as a sump pump with battery backup.

Radon Mitigation System, Hollis, NH

Radon Mitigation System, Hollis, NH

Before After
Radon Mitigation System, Hollis, NH Radon Mitigation System, Hollis, NH

This homeowner in Hollis, New Hampshire was in need of a radon mitigation system after levels tested high in his home. An efficient system was designed and installation took half a day. 

SmartJacks Installation, Hollis, NH

SmartJacks Installation, Hollis, NH

Before After
SmartJacks Installation, Hollis, NH SmartJacks Installation, Hollis, NH

This homeowner in Hollis, New Hampshire recently purchased the home and noticed the floor was sagging a little. The homeowners wanted to look into the options they had to permanently fix the sag in the floors. Design Specialist Michael Bierdzycki came to the home and talked to the homeowners about the options they had. They settled on installing SmartJacks in their home. Josh Provost and his crew installed the SmartJacks into the home to permanently fix the sag on the floor. 

Company Awards
Angi Super Service Award
Angi Super Service Award - 2023... [Read more]
Large Business of the Year - Gr. Hudson Chamber of Commerce.
We're proud to be recognized by the Greater Hudson Chamber of Commerce as Large Business of the Year for 2021!... [Read more]
Best of HomeAdvisor - 2020
Best of HomeAdvisor - 2020... [Read more]
More Awards

Your Proven Hollis, NH Concrete Repair & Foundation Repair Company

Had Erickson's out to install a radon mitigation system and a sump pump. Everyone from beginning to end was extremely...
Happy Customers Surrounding Hollis, NH

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Reviews From Hollis
Testimonials From Hollis
PolyLEVEL was recommended by a friend, job came out great.
Testimonial by Carol R. from Hollis, NH
Very satisfied with the work completed.
Testimonial by Jake S. from Hollis, NH
The workers were polite. They explained the job and their approach. Very pleased, the work was done well.
Testimonial by Douglas T. from Hollis, NH

Erickson Foundation Solutions has been the trusted, local professionals to call in Hollis, NH, for foundation repairs, concrete repair, radon mitigation, basement crack repair and even crawl space repair. Our in-house team of expert engineers know how to properly determine and repair the structural issues you are going through. Whether you have water in your basement or your crawl space, or need concrete lifting, leveling or foundation structural repair, we have your back. We provide a 25-year written warranty for all of our foundation products. With the professionals at Erickson Foundation Solutions, you can feel safe knowing that your repairs are in good hands.

Foundation Repair Contractor Hollis, NH

No one wants to have to go through structural and foundation repairs, but there are times where you shouldn’t wait any longer and call the trusted local professionals Erickson Foundation Solutions, to get your job done the right way. Our products are designed and tested by Supportworks, Inc.; an international network of more than 100 skilled structural repair contractors. We are the areas only company equipped to fix your repairs with these products. Some of the repairs we take on are:

  • Bowing Walls
  • Sagging Floors
  • Stair-Step Cracks
  • Tilting Chimneys
  • Foundation Cracks
  • Garage Slabs

Hollis, NH Local Concrete Leveling Expert

Sunken and cracked concrete around your home is not only an eyesore but is also a safety hazard. As time goes by, if the problem isn’t corrected, it will only get worse. However, you have no reason to fret when you have the professionals at Erickson Foundation Solutions doing the work. Our experts use PolyLevel, a strong, and durable foam material to lift your concrete slabs back into place. We drill small holes into the slab where the foam is injected and expands, raising the concrete into place. Many other contractors will use mudjacking, but our method doesn’t disturb the area, takes less drying time, and is more affordable.

After repairing your concrete, consider a durable concrete sealant that extends the life of your slabs by 3 to 5 times overall in just one quick application. Our SealantPro concrete sealant bonds with concrete on a molecular level to protect slabs against oil, gasoline, water, debris, and more. Whether you have new slabs or existing slabs, SealantPro will work for you! We also offer a translucent tinted concrete sealer, DecoShield, which adds a unique visual appeal to your home's slabs while preventing pitting, flaking, cracks, and other moisture-related issues.

Our Concrete Repair Solutions:

  • SealantPro™ Concrete Sealing
  • DecoShield™ Concrete Sealer
  • Sidewalk Repair
  • Pool Deck Repair
  • Concrete Driveway Repair
  • Mudjacking

The benefits of PolyLevel®:

  • Non-invasive installation
  • Quick application & curing
  • Clean &precise lifting
  • Adjustable & durable for loads of all sizes

Contact us today to schedule a free concrete leveling estimate for your Hollis home or commercial property!

Get in contact with us today and get your FREE concrete leveling and concrete sealing estimate!

Crawl space repair contractor in Hollis, NH

The crawl space is often an underappreciated part of the home that often gets issues with mold. Since it is more often an out of sight out of mind, when problems occur with your crawl space it can easily have wide-ranging effects on the entire home. This is especially true since many older crawl spaces were vented due to mistaken beliefs about home construction. These vents make it easy for mold and rot to occur, causing issues throughout the home like uneven floors, foul smells, worsened allergy symptoms, and more.

Crawl Space Repair Services Offered in Hollis, NH:

  • Crawl space vapor barrier
  • Crawl space waterproofing
  • Crawl space dehumidification
  • Crawl space support posts
  • Crawl space insulation
  • And more!

If you are noticing any of these issues then our experts can help. We offer a wide range of crawl space repair services designed to help your home including encapsulation, waterproofing, insulation, and more. Contact us today to schedule your free estimate!

Radon Gas Mitigation Systems

Radon gas is colorless, odorless, and as cancer-causing as to//bacco and asbestos. Radon gas is produced from the decaying of rocks and soil and comes up from the ground into your crawlspace and basements. The way our radon mitigation systems works in a pipe collects the gases that are coming from the soil. The gas is then piped upwards where a depressurization vent forces the radon out from your home. Our radon mitigation system is completely compatible with the current waterproofing system in your home. Get in contact with us now to learn how to protect your loved ones from the harmful effects of radon gas.

Radon and Indoor Air Quality Services Provided in Hollis, NH:

  • Radon Testing and Inspections
  • Radon Mitigation and Abatement
  • Indoor Air Quality Testing

Basement Crack Repair

At any stage of your home when water starts to leak, it can lead to serious flooding and serious damage. So when it starts to leak in your basement, act fast. Erickson Foundation Solutions understands how all different types of basement leaks are caused, which is why we provide fast and efficient solutions to handle every source of wall and floor leaks. we also offer egress windows and dehumidifiers

To get a free estimate on basement leaking solutions and crack repair services, call us at 1-855-239-3489 or click below!

Job Stories From Hollis, NH
Replacing Wooden Supports in Basement, Hollis, NH

A new homeowner in Hollis, New Hampshire, recently noticed that the wooden supports in the basement of their block foundation home were old and rotting. They contacted EFS for a free inspection, and our Design Specialist, Isaac Hernandez, examined the supports. Isaac found that the wooden supports had deteriorated due to exposure to water and recommended that they be replaced with our galvanized steel SmartJacks. Although Isaac also recommended a waterproofing system, the homeowners opted to wait on that.


Our installation team, led by Neal Foley, began by setting up temporary posts between the wood supports to provide support for the floor system while the old supports were removed. Once the old supports were removed, we chipped out concrete to install our big plate footings beneath the concrete slab. After the three footings were installed, we put in the supports and connected the adjustable top to the beam using screws. The SmartJacks were installed, and we finished by mixing concrete and covering the big footings to lock the supports in place.


After cleaning up the job site, we did a walkthrough with the homeowners and showed them the SmartJacks and some of their features, including the adjustable top that can lift the floor to make it level. The homeowners were very pleased with the installation of the system.

Preventing Water from Entering the Basement, Hollis, NH

A homeowner in Hollis, New Hampshire had been experiencing water intrusion in their basement since they moved in back in 2017. Despite their construction background, their DIY attempts to solve the issue had been unsuccessful. The homeowner was tired of having to vacuum the water out of the basement and wanted to finish it once the water issue was resolved. As a result, they contacted EFS for a free inspection. Our Design Specialist, John Prince, inspected the basement and determined the source of the water intrusion. He recommended installing a full perimeter drainage system with radon-neutral perimeter drainage to prevent radon seepage.


Our installation team, led by Anthony LoCascio, began by removing over 100 feet of concrete around the perimeter of the basement. This allowed us to install the perimeter drainage and TripleSafe sump pump. We installed the sump pump basin to eject water out of the basement while we worked. We then installed the Radon Neutral WaterGuard and Trench Lock around the perimeter of the basement and added 58 feet of CleanSpace wall to protect that section from water seepage. The team finished by installing the exterior drainage system to carry the water away from the foundation of the home. They also installed 10 feet of buried exterior drainage and attached it to IceGuard to prevent exterior drainage backup into the basement. Lastly, the team covered the perimeter drainage with concrete to lock the system in place.


The homeowner was extremely pleased with the installation of the new system. Since installation, the homeowner has not seen any water in the basement. They can now begin the process of finishing the basement.

Replacing Foundation Wall With Masonry Wall, Hollis, NH

A homeowner in Hollis, New Hampshire bought their parent's home 10 years ago. The house was built in 1963, and the foundation wall of the garage had bowed, causing concern for the homeowner. They spoke to another company that suggested pouring a new wall, but the homeowner was not interested in that solution. Instead, they contacted EFS for a free inspection of the garage foundation. Our Design Specialist met with the homeowner, and after inspecting the entire garage structure, recommended replacing the existing foundation wall with a Masonry Block Wall Foundation. The homeowner chose our company due to our experience in the industry and our superior solution.


Our Installation Team, led by Nick Carelli, began by setting up temporary supports and removing the existing foundation wall. After the wall was removed, the team poured a new footing and let the concrete cure. Once the curing process was complete, we began to lay the blocks for the new foundation wall. When the team reached the framing of the garage, they put on the finishing touches and installed waterproofing on the outside of the wall to prevent water from seeping through the foundation. After the waterproofing was installed, we started to backfill and tamp the soil back to its original position.


The homeowners were delighted with the results of the project and how the team left their home better than they found it.

Water Entering Basement Through Bulkhead and Foundation Wall, Hollis, NH

A homeowner in Hollis, New Hampshire, had finished building their home last year. Since they've been living in the home they have seen water entering the basement. The water seems to be coming from their bulkhead and a small crack in the foundation wall. The homeowners decided to call EFS for a free inspection of their basement. Our Design Specialist Kenny examined the entire basement and recommended installing crack injection to seal the crack on the foundation wall and installing TrenchLock to the door at the bottom of the bulkhead to collect any water that enters. 

Our Installation Team began by injecting 4' of Crack Injection into the crack on the foundation wall. After the crack was sealed, the team installed a Crack Monitor to keep track if the crack continues to move or not. Next, the team then installed a 5' section of TrenchLock to the bottom of the bulkhead entrance. 

The homeowner was very happy with the results of the project. Since the project, they haven't seen any water enter the basement of their new home. 

Water Entering Basement Through Bulkhead and Foundation Wall, Hollis, NH - Photo 1
High Radon Levels in Home, Hollis, NH

A homeowner in Hollis, New Hampshire, has lived in the home for the past 18 years. They recently tested their home for radon and the results came back around 7 pCi/L. The homeowner wanted to find a reputable company to install a radon mitigation system in their home. They reached out to EFS and our Design Specialist designed a radon system that would be in their home. Because of the size of the home the Design Specialist recommended installing a second extraction point. 

Our Installation Team began by creating the two extraction points on opposite sides of the basement. The team used a core drill to make a circular hole in the slab so the team could fit a PVC pipe to each extraction point. The team then connected the two extraction points with PVC and fed them to the exterior of the home where we installed a fan to the side of the home. We then connected the PVC pipe and the fan and then vented the entire system above the roofline of the home. 

After the system was fully installed, the team then tested the home again for radon. The results of the test were well under our goal of 4.0 pCi/L. The homeowner was very pleased with the results of the installation of the radon system. 

Concerns with Crack on Garage Floor, Hollis, NH

A homeowner in Hollis, New Hampshire, had lived in their home for the past two years. When they moved in they noticed the cracks in the garage slab. Since then the problem has only gotten worse. They want to have the concrete leveled and the cracks sealed. The homeowners decided to call EFS for a free inspection. Our Design Specialist James inspected the home and recommended using PolyLevel to level the concrete and seal the cracks with NexusPro.

Our installation team began by having everything removed from the garage. Then the team will drill small holes in the concrete so we can inject PolyLevel underneath the garage slab. The team drills the 1/4" holes in a grid pattern around the garage so we could lift the garage in sections. Once all of the port holes were drilled through the slab, the team then started up the PolyLevel rig and began injecting PolyLevel foam into each of the port holes. The team injected PolyLevel into each hole until the PolyLevel Technician felt the concrete start moving upward. They used a level to check that the entire slab was level. After the team finished will the PolyLevel, they moved on to seal all of the cracks in the garage using 100' of NexusPro. Once the team sealed all of the cracks and ports were sealed the team then did a walkthrough with the customer to show them the work. 

The homeowners were very pleased with the results of the project. 

Floor Support Issues, Hollis, NH

A homeowner in Hollis, New Hampshire was beginning the process of installing an inground pool in their backyard. During the backyard excavation, they removed a set of stairs against the foundation wall. Behind that set of stairs brought up potential concerns about the foundation wall. To ensure the foundation wall was secured, they called EFS for a free inspection. Our Design Specialist Victor inspected the foundation of the home to reveal nothing of major concern, but when the homeowners were in the basement with Victor they mentioned they noticed a musty smell in the basement and they felt that the first floors have a bounce to them. Victor furthermore inspected the basement and found that the supports in the basement were a mix of old wooden and temporary supports. Victor recommended installing 12 SmartJacks to replace the old supports and a SaniDry dehumidifier to eliminate the musty smell in the basement. 

Our production team began by installing a SaniDry into the basement of the home to control the humidity in the basement. After the dehumidifier was set up the team began setting up our temporary posts around the basement so we could remove the old supports. The team, abiding by the drawing done by Victor, marked where each of the 12 SmartJacks will be installed. To install the SmartJacks, the team first had to excavate some dirt from the dirt floor so they can create a strong footing for each SmartJacks. After they removed some dirt the team mixed and poured concrete into each of the holes they made. Once the concrete had been set, the team then placed the SmartJack footings over each concrete footing. The team made sure that each of the footings that we installed would have to be level before installing the rest of the SmartJack. After all of the footings were installed and leveled, the team then installed the support and the adjustable bracket to the main beam of the home. Once all of the supports and brackets were installed they used the adjustable bracket to make sure the floors were leveled above. 

The homeowner was very pleased with the results of the project. 

Watering Entering Basement, Hollis, NH

A homeowner in Hollis, New Hampshire, had water entering their basement and causing damage to the floors and belongings. Water appears in the basement during periods of thaw/ melt, and or heavy rains. The homeowner has seen up to 4" of water in their basement at one time. Our design specialist Tom recommended installing a perimeter drainage system in their basement. 

Our waterproofing team began by chipping out concrete at the base of the basement wall. The team chipped out a 6" wide trench around the entire perimeter of the basement. This trench will hold our WaterGuard perimeter drainage system. Any water from the wall or the ground will be collected by this channel and directed to a sump pump. As the team was chipping out the concrete for the WaterGuard the team also chipped out the basin for the sump pump. After the team was finished chipping all of the concrete they began laying the WaterGuard into the channel. The team connected each section of WaterGuard with a strong adhesive and made sure to pitch the WaterGuard so the water can run downhill toward the sump pump. The team installed the TripleSafe Sump and connected it to the WaterGuard. Once the WaterGuard and TripleSafe are connected the team began mixing concrete to cover the perimeter drainage and around the sump pump. When the concrete was curing the team used a coring drill to make a hole in the wall to allow the drainage pipe to push water outside. Attached to the drainage pipe on the exterior of the home, the team installed an IceGuard to prevent water from backing up into the basement. The team dug a trench for the drainage line. The trench was dug out into the yard to prevent water from re-entering the home.

The team completed installing the perimeter drainage system in the basement. The homeowner doesn't have to worry about water collecting in their basement anymore. 

Watering Entering Basement, Hollis, NH - Photo 1
Radon Mitigation System, Hollis, NH

A homeowner in Hollis, New Hampshire had a radon level in their home around 27 pCi/L. They wanted to get radon levels back down to 4 pCi/L, so they decided to call EFS for a free inspection. 

Our design specialist examined the home and found where they could install the radon mitigation system.

The radon team installed the radon mitigation system into the home and reduced the radon levels to below 4 pCi/L. 

Homeowner Wants to Improve Look of Concrete, Hollis, NH

This homeowner in Hollis, New Hampshire likes to take very good care of their property and has high standards for how they like their property to look. The homeowner has a section of concrete that shows some cracks and a gap between the home and concrete. The homeowner sees this as an eyesore and would like to have it repaired. They decided to call EFS for a free inspection.

Design Specialist Chris Greenwood inspected the concrete patio. Chris found that the patio has sunk around 1-2". Chris recommended injecting PolyLevel under the concrete to lift it back to flush with the home(or as close as possible). 

Nick Melo and Tyler Oslizlo injected PolyLevel and lifted up the patio. They also repaired the cracks in the concrete and installed NexusPro on the edges where the concrete meets the brick. 

Homeowner Wants to Improve Look of Concrete, Hollis, NH - Photo 1
Water Entering Basement is Causing the Basement to Smell, Hollis, NH

This homeowner in Hollis, New Hampshire had purchased their 1830s home a couple of months ago. During the home inspection, they noticed an odor in the basement. More recently they found out that the odor in the basement is because of water entering the basement. They decided to call EFS for a free inspection. 

Design Specialist Michael LaMalfa inspected the home. During his inspection, he found that the mortar in this almost 200-year-old basement is deteriorating. Water is coming through the holes where the mortar has deteriorated and causing water to collect in the basement. Michael recommended installing an Auxilary wall, Water Guard, Super Sumps, and Sani Dry. 

Crew Lead Nick Carelli and his team arrived at the home and installed an Auxilary wall, 109 ft of Water Guard, 2 Super Sumps, and a Sani Dry into the basement. 

Homeowner Needed Perimeter Drain Redone, Hollis, NH

This homeowner in Hollis, New Hampshire previously had Northeast Basement Systems install a perimeter drainage system installed in their basement in 2000. Over 20 years later one part of the perimeter drain doesn't drain water properly anymore. They decided to call EFS to fix their perimeter drainage system. 

Design Specialist Isaac Hernadez inspected the Perimeter Drain in the basement. Isaac confirmed that one part of the perimeter drain wasn't working properly. Isaac recommended installing a new Water Guard system to the perimeter of the basement. Isaac also suggested having a new sump pump installed.

Crew Lead Nick Melo and his team arrived at the home and installed 55 ft of Water Guard and a new sump pump.

Crack in Foundation Letting Water into Basement, Hollis, NH

Alexander C. of Hollis, New Hampshire was experiencing water entering his basement through two cracks in his foundation. After a big rainstorm, he reached out to EFS to see if they could come out and seal the cracks. Design Specialist Paul Magowan came to the home and inspected the cracks that were in question. He proposed a long lasting crack seal and then use a crack monitor on the bigger crack. The Crack Monitor will allow the homeowner to see if the crack is getting worse or remaining the same. 

Crew Lead Branden Edwards and his crew came to the home and sealed both the wall cracks and installed a Crack Monitor on the crack near the stairs. Both cracks were sealed successfully and won't allow water to enter anymore. 

Alexander was happy was pleased with the results and no longer has a water issue. 

Crack in Foundation Letting Water into Basement, Hollis, NH - Photo 1Crack in Foundation Letting Water into Basement, Hollis, NH - Photo 2Crack in Foundation Letting Water into Basement, Hollis, NH - Photo 3Crack in Foundation Letting Water into Basement, Hollis, NH - Photo 4
Radon Mitigation & Sump Pump, Hollis, NH

Wendy R. of Hollis, NH had concerns with high radon levels in the home she had recently purchased. After testing, levels were at 5.6 pCi/l in the basement. She chose Erickson Foundation Supportworks as her contractor to install a radon mitigation system in order to lower these levels. 

When crew foreman, Nick Carelli, began installation of the system in the basement, he had to drill a 5" hole through the concrete slab. Upon breaking through the slab, he found the water table was very high under the home. He suggested to the new homeowners that if they wanted to fully protect their investment, they should consider installing a water sump pump system. Rather than wait for the water to rise and have a concern with cleanup and possible damage, Wendy decided to be proactive and have the sump pump system in place in order to protect her home.

The entire installation for both systems was quick, clean and precise, and Wendy now has peace of mind with her new home. Her radon problem was solved, and the home is also now protected against any future rising water tables.

Radon Mitigation & Sump Pump, Hollis, NH - Photo 1

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