Best basement waterproofing pros near Seward, AK

Q: Can underfloor insulation cause moisture and mold?

• <div><p>Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and&mdash;if your floors are wood&mdash;rotting.</p></div>

Q: Can I add a sump pump to an existing basement?

• <div><p>A sump pump can be added to an existing basement. To do this, you will need to use a jackhammer or sledgehammer to break up the concrete and dig a pit. You will also need to create a hole in your basement wall to run the discharge pipe through.</p></div>

Q: What if there is standing liquid on my concrete?

• <div><p>If there is standing liquid on your concrete, remove it before attempting any of the above cleaning methods. For small amounts of water, use rags, a bucket, and a mop. For larger areas of liquid, lay down cat litter or baking soda to soak up the water first. If you have extremely large pools of water sitting on your concrete, break out the wet vac and get to work.</p></div>

Q: What materials can stop a flood?

• <div><p>The most flood-resistant materials you can count on in a flood scenario are concrete, closed-cell insulation, foam insulation (also known as expandable foam), pressure-treated wood, marine-grade plywood, and ceramic tile. When a material is flood-resistant, it can withstand direct contact with floodwater for at least 72 hours without being significantly damaged. </p></div>

Q: What is the safest insulation for basement walls?

• <div><p>Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don&rsquo;t have to worry as much about a fire breaking out as you would with spray foam insulation. </p></div>

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Verified Reviews for Basement Waterproofing pros in Seward, AK

*The Angi rating for Basement Waterproofing companies in Seward, AK is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

*The HomeAdvisor rating for Basement Waterproofing companies in Seward, AK is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Waterproofing needs.

Last update on July 15, 2026

Reviewed in July 2026
Took 14 months to do a 6 week job. Had concrete pad done October 2024. Came over summer of 2025 and didn&#39;t finish until 12-31-25... and said that job was done. They didn&#39;t screw down metal on crest of roof nor both sides of flashing on roof. Did mud and taping in cold...
Schwartz Builders
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Reviewed in June 2025
I could not put into words the attention to detail, customer service, and quality of workmanship ship . They treated me like family. l am definitely recommending them to others. I plan to use them again in the future. They worked within my budget. Thank you for sending them my way. On the hand,...
Cajun Alaskan Services
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Reviewed in December 2024
Very easy to communicate with and listened to exactly what I wanted. Definitely a great experience and will be using them in the future! Can’t express enough how impeccable the overall work was!
Alaska Restoration, Remodel, and Roofing (AR3) LLC
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Reviewed in December 2024
I saw Terry doing some outstanding stucco repair on a building in Seward and I approached him about doing a repair on my motel called the Tides Inn Seward Alaska. Terry come over to give me an estimate and he noticed that my sidewalk leading up to my main office lobby was in terrible shape....
Quality Craft Services
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Reviewed in October 2023
This was one of the most miserable experiences of my life, during an already traumatic time, and I highly recommend you looking elsewhere before even considering this company. - I was a local move and you'd think the logistics of a local endeavor would be way simpler than anything long distance,...
Royal Alaskan Movers
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Reviewed in October 2023
Highly recommended, professional and knowledgeable in all aspects. Friendly and polite guys, they helped with our color selections and it was a blessing!!
PISTRO'S PAINTING, LLC
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Reviewed in February 2022
Mike is very easy to work with. He is very attuned to detail and has your interests at the top of his list.,,making sure you are happy with each feature and itâ s just the way you want it. His finished product is a thing of beauty! I have given his number to friends, promising they will be...
Nichols Construction
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Reviewed in June 2021
Very professional and it was a pleasure to work with them.
Pete's Welding
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Reviewed in November 2020
From the moment of setting up an appointment to having the work done, all was accomplished in a professional, knowledgeable and friendly way. I had four windows (big) and outside door done the first round starting with Jesse and Bobby, and two windows the second round, Brian, Jacob and Tyrone....
Renewal by Andersen of Alaska
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Reviewed in August 2020
She lives in Ninilchik and the service I needed was in Seward. She was willing to drive all the way out and do it for me, but I was on a time crunch and had to find someone that could do it ASAP. She went above and beyond for me and I appreciate her help so much! Such a sweet lady!
Linda Lou's B&B Adventures
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Top-Rated Basement waterproofing pros in Seward - Updated Nov 2026

911 Plumbing and Heating Services

4.6(

)

Basement Drainage Channels - Install

Serving Seward, AK and surrounding areas

In business since 2018

Free estimates

Emergency services offered

"Dillon did a wonderful job, we will be hiring him again for future work."

+11

Recommended by83%of homeowners

Basement Drainage Channels - Install

Serving Seward, AK and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Kent has done everything he has said he would do along with give us some improvement suggestions that would either make the project better or save us some money."

excavation completed and starting footer system.

Back filling the fox block footing system after insulation placed at lower footer.

DBL Clean out at tank.
Preferred install method

+14

Recommended by100%of homeowners

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Victory Drain Cleaning

5.0(

)

Basement Drainage Channels - Install

Serving Seward, AK and surrounding areas

In business since 2016

Free estimates

Emergency services offered

"It was wonderful and they were terrific."

Recommended by100%of homeowners

Foundation, Basement or Crawlspace - Waterproofing / Encapsulation

Serving Seward, AK and surrounding areas

In business since 2005

Free estimates

Emergency services offered

We are committed to providing excellent customer service and professional work. We work to keep our overhead low to give the best prices to our customers. Check us out at equitybuildersak.com

Recommended by100%of homeowners

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Basement Waterproofing FAQs, answered by experts

Underfloor insulation alone will not cause moisture and mold, but improper installation can. Although the purpose is to seal any drafts, your subfloor still needs ventilation. If you seal the area too tightly and prevent all airflow, this can cause moisture to get trapped. This moisture eventually leads to mold and—if your floors are wood—rotting.

A sump pump can be added to an existing basement. To do this, you will need to use a jackhammer or sledgehammer to break up the concrete and dig a pit. You will also need to create a hole in your basement wall to run the discharge pipe through.

If there is standing liquid on your concrete, remove it before attempting any of the above cleaning methods. For small amounts of water, use rags, a bucket, and a mop. For larger areas of liquid, lay down cat litter or baking soda to soak up the water first. If you have extremely large pools of water sitting on your concrete, break out the wet vac and get to work.

The most flood-resistant materials you can count on in a flood scenario are concrete, closed-cell insulation, foam insulation (also known as expandable foam), pressure-treated wood, marine-grade plywood, and ceramic tile. When a material is flood-resistant, it can withstand direct contact with floodwater for at least 72 hours without being significantly damaged.

Rigid foam board insulation is one of the safest insulation materials for basement walls. The panels offer a moisture barrier to prevent mold and mildew build-up. At the same time, this material is also fire-resistant, so you don’t have to worry as much about a fire breaking out as you would with spray foam insulation.

The Seward, AK homeowners’ guide to basement waterproofing services

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

See all articles

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