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TRUSTED BY ONSET, MA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon20
    Verified basement waterproofing services reviews

Find Basement waterproofing pros in Onset

Avatar for Pioneer Basement
Pioneer Basement
4.5(
264
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Onset, MA and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"It went well. They are being professional in their follow-up as they are trying to have us install an expensive basement drainage/pumping system. We haven't decided yet, as it will be part of our basement gut/rehab project."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+5

Response time2 days
12 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Key Waterproofing Construction
Key Waterproofing Construction
4.6(
227
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Onset, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 2014

Free estimates

Warranties offered

"Recently needed some waterproofing work done in my basement, proceeded to look up 3-4 different companies thet did basement water proofing work decided to go with Key Waterproofing and it was a "GREAT CHOICE"!!! Was notified as to when the job was to be done, 3 great guys showed up,right on time, went right to work installing a Sump-Pump in our basement floor to takecare of our water problems. They did neat, high quality work everything was cleaned up with a "job that was well done". "Very satisfied" would highly recommend Key Waterproofing for all your waterproofing needs!!!!!!!"
Response time12 hrs
27 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Start 2 Finish Waterproofing Construction
Start 2 Finish Waterproofing Construction
5.0(
9
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Onset, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Emergency services offered

"Excellent company to go for.. Highly professional team. Dependable and right on time. Ed and Bob are so precise in their work and completed as per plan.I would highly recommend S2F to anybody looking for preventing water penetration in basement"
Water Leak Basement
Water Leak Basement
Basement Finishing
Basement Finishing
Basement Stairway

+44

Response time8 hrs
Recommended by50%of homeowners
Avatar for Drycrete Waterproofing
Drycrete Waterproofing
5.0(
19
)
Foundation, Basement or Crawlspace - Waterproofing / EncapsulationBasement Drainage Channels - InstallBasement Drainage Channels - Repair

Serving Onset, MA and surrounding areas

Approved

In business since 1979

Free estimates

Warranties offered

"We had 4 basement waterproofing companies come into our home to do an assessment of our basement. We are updating our home and finishing our basement. Although we only had occasional and minor water leaks we wanted to protect our investment. Our time with Mike, Jason, and the rest of the team was professional and informative from the first moment. They were responsive with our estimate, fair with their pricing, and willing to answer our questions along the way. The crew arrived on time and ready to get the project started. We had a couple of large items that we needed help moving and they assisted so that we could keep the basement clean. The work that was performed was done so with care. The basement was kept as clean as possible, and our input was taken into consideration along the way. Hands down thankful for the experience and piece of mind that we now have."
Drain systems / Sump pump
On the job
Crew
3/4HP Pump
Sump pump

+9

Response time6 hrs
Response rate96%
14 neighbors recently requested a quote
Avatar for Atlantic Coatings
Atlantic Coatings
5.0(
3
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Onset, MA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

We are a full service Waterproofing business serving Eastern Massachusetts. We offer interior & exterior basement waterproofing, sump pump installation, crawl space encapsulation, dehumidifier installation. Whether it's proactive or reactive- we can help!\n\nWe are not like the others. We are locally & privately owned. No pushy salesmen to meet sales quotas- the owners, Jeff and Dave design your system to your homes needs, and are on site every day of your project. We have a deep passion for building science, and truly love what we do. This allows us to offer to best possible products and services to our clients!

Crack repair
Rubber waterproofing
2 neighbors recently requested a quote
Avatar for Inner Boston Masonry & Construction, Corp.
Inner Boston Masonry & Construction, Corp.
5.0(
41
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Onset, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Contacted Mark within 3 days he was at my home and providing a detailed quote. Might seem small but he was the only one out of 4 contractors who actually measured the space to provide an accurate and detailed estimate. He while discussing what I wanted with me made many recommendations and even mentioned ways to get the job done but at a lower cost. He had the estimate to me within 2 days and it was super detailed and broken down with 3 different ways to complete it. He was on time daily as was his crew. Work areas were cleaned daily. He closed up a broken window for us, redid a dirt floor with drainage and concrete, repointed and waterproofed our basement foundation, ripped out and fully replaced basement access stairs. He even noticed a window that was broken we didn’t and closed it up for no charge. He added a drain to the exterior steps at no charge wasn’t in contract he just knew it was needed, the steps he replaced had asphalt around them and he even repaired the asphalt at no c"
My jobs
My jobs
My jobs
My jobs
My jobs

+11

Response time4 hrs
Response rate98%
13 neighbors recently requested a quote
Avatar for J. Bean Excavation LLC
J. Bean Excavation LLC
5.0(
5
)
Basement Drainage Channels - Install

Serving Onset, MA and surrounding areas

Approved

Emergency services offered

Warranties offered

Credit card accepted

J. Bean Excavation LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

before
before
before
after
after

+29

16 neighbors recently requested a quote
Aponte Contracting
4.1(
34
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Onset, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1990

Free estimates

Small jobs welcome

"Mr. Aponte is a true craftsman and professional. We needed a bedroom ceiling replaced and window framing, trim work done. Mr. Aponte reached out quickly and was able to visit us for a quote in a short amount of time. His pricing was very fair and he had a very creative solution to our problem. Mr. Aponte was an excellent communicator both on site and by phone. He always showed up exactly when he said he would. It was very much appreciated! Our ceiling is absolutely perfect. Now, you can’t tell that any work was done at all, and I am pretty picky. His craftsmanship is incredible. He also pointed out some problems that a different installer had made which allowed us to have our window re-insulated and waterproofed. That will save us so much money in heating costs and potential insect, water damage—he has a real heart for his clients and wants to make sure their house is perfect as possible. We will be hiring Mr. Aponte again for additional projects very soon, thank you so much!"
Response time6 hrs
5 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Kings Masonry & Construction, Corp.
Kings Masonry & Construction, Corp.
5.0(
5
)
Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Onset, MA and surrounding areas

Approved

In business since 2021

Free estimates

Offers commercial services

"I contacted John as I have a fair amount of water coming in my basement. He promptly came out for a visual inspection and set up a time to do a physical inspection while he was with us. His team worked quickly and efficiently. Once they dug down to the bottom of the foundation, John was able to explain the issues at hand to me and work within my budget to get the job done to the best of their ability. His team worked quickly and cleaned up their site better than it was when they found it."
Response time6 hrs
Response rate94%
8 neighbors recently requested a quote
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Basement Waterproofing questions, answered by experts

Some disadvantages of crawl spaces are mostly regarding the air itself—moisture build-up and poor ventilation, which can cause problems both in the house and underneath it, even damaging the foundation itself. Crawl spaces are difficult to access and often invite unwanted pests during the hot summer months and the cold winter ones. These hard-to-seal spaces are also susceptible to water damage during periods of heavy rain or melting snow.

Water can seep into porous materials like wood beams, floor joists, and roof rafters within minutes, but they’ll need to see prolonged exposure before you have structural damage. Mold can start growing within 24 hours, and mold can eat away at the structural components over time. Wood rot is more of a concern, though. Wet and dry rot are fungal infections that set in in moist conditions and rapidly deteriorate wood, causing major structural damage within just a few months in some cases.

Yes, it is possible to over-dehumidify a house by removing too much moisture from the air. This can create an overly dry environment that negatively affects those with respiratory or skin issues, and may cause your skin, hair, and sinuses to feel dry. However, this is unlikely to happen with most modern dehumidifiers, as they are equipped with moisture sensors and adjustable settings. These features allow the unit to pause automatically when the desired humidity level is reached, preventing the air from becoming uncomfortably dry. In contrast, older or more basic dehumidifiers left running for too long could potentially over-dry the air. To avoid this, aim for a balance between removing excess moisture and maintaining a comfortable environment. You can often monitor your home's humidity levels using a modern thermostat for guidance.

In most cases, it is safe to live in a home with minor foundation problems, but you should not let the issues persist. Virtually all foundations have small cracks from normal settlement, which are not a structural concern but should be sealed to prevent water intrusion. However, major damage—such as large structural cracks, sinking foundations, or bulging walls—can make a home unsafe. Other issues that can pose safety and health risks include poor indoor air quality from mold or pests, uneven floors, and rotten beams or joists. It is always best to have a foundation repair expert or structural engineer inspect any issues to determine if your home is safe to live in.

Proper drainage is the only way to ensure that your crawl space stays dry. Depending on your property and the extent of your issue, you might need to consider a gutter system, a French drain, or sump pumps to avoid and handle water and moisture under your home. Dehumidifiers can also help to prevent moisture from accumulating if you have a high-humidity environment.

The Onset, MA homeowners’ guide to basement waterproofing services

From average costs to expert advice, get all the answers you need to get your job done.