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Verified Reviews for Basement Waterproofing pros in Flagstaff, AZ

*The Angi rating for Basement Waterproofing companies in Flagstaff, AZ 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 Flagstaff, AZ 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 May 06, 2026

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Avatar for Groundworks
Groundworks
5.0(
7
)

Serving Flagstaff, AZ and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Warranties offered

"Alex and Donavan were very thorough. Discovered more than what we called them for. We originally wanted information on sealing cracks to eliminate cricket infestation coming through cracks in stem wall. We were not interested in repairing foundation rebar which is typical in slab homes in AZ. They were knowledgeable and honest in their evaluation of our home."
Basement Waterproofing
Basement Waterproofing
Basement Waterproofing
Basement Waterproofing
Crawl Space

+22

161 neighbors recently requested a quote
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Avatar for City Plumbing & Rooter AZ, LLC
City Plumbing & Rooter AZ, LLC
5.0(
5
)

Serving Flagstaff, AZ and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"I can’t recommend City Plumbing and Rooter AZ enough. Paul went above and beyond when we really needed help. We were staying at an Airbnb for my brother’s bachelor party, and things went sideways fast after the restrooms got seriously overused. It was a stressful situation, especially after hours—but Paul showed up quickly without hesitation. He and his nephew got straight to work, handled everything efficiently, and clearly knew exactly what they were doing. What stood out most was how calm, respectful, and professional they were in a pretty chaotic moment. They didn’t waste time, didn’t overcomplicate things—just got it done. If you ever find yourself in a plumbing emergency, especially at the worst possible time, Paul is the guy you want to call. Reliable, responsive, and genuinely cares about helping people out."
Walter - Mascott
Cleanouts w/Backflow
Approval from City
Installing Cleanouts
Septic Fix

+3

30 neighbors recently requested a quote
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Avatar for A-1 Concrete Repair & Waterproofing, LLC
A-1 Concrete Repair & Waterproofing, LLC
4.2(
5
)

Serving Flagstaff, AZ and surrounding areas

In business since 2017

Free estimates

Warranties offered

Our company was built on hard work, honesty, and integrity and we are proud to service our neighbors here in the valley of the sun. \n\nWe offer an array of professional concrete repair, foundation stem repair, and waterproofing services that include basement waterproofing, retaining wall waterproofing, balcony deck waterproofing, etc.\n\nHere at A-1 Concrete Repair & Waterproofing, we combine good old-fashioned customer service with modern experience and equipment. Giving you the peace of mind and reassurance that your concrete repair or waterproofing project will get completed right the first time around.

Foundation Stem
Foundation Stem
Foundation Stem
Foundation Stem
Foundation Stem

+4

Response time3 days
Response rate97%
4 neighbors recently requested a quote
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Avatar for Hampton Enterprise LLC
Hampton Enterprise LLC
3.7(
9
)

Serving Flagstaff, AZ and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"I only use James when I need some work done to my house. He responds fast, gets the work done quicker than just about anyone else I've ever used and seems very concerned with leaving his customers happy."
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Recommended by60%of homeowners
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Avatar for SMALLJOBSNOW.COM
SMALLJOBSNOW.COM
5.0(
1
)

Serving Flagstaff, AZ and surrounding areas

In business since 1982

Free estimates

Emergency services offered

"The two men were quick and efficient. They made sure that the cabinet was re-attached to studs. They sprayed Lysol under the sink to prevent spread of mildew."
Additional Photos
Additional Photos
Additional Photos
Recommended by100%of homeowners
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Basement Waterproofing questions, answered by experts

Brick is designed to absorb moisture, but it is also designed to let it evaporate as well. So in general, the goal shouldn’t necessarily be keeping moisture out but making sure it has the room to breathe. If you have excess moisture getting through your brick wall, it’s more likely that you have a crack or other issue at play that a typical sealant won’t fix. So, instead of investing in sealant, try repairing your brick wall instead.

In most cases, a crawl space will not dry out on its own unless the moisture comes from an uncommon flood and isn’t expected to be a recurring issue. For most homeowners, moisture problems in the crawl space will only continue to get worse over time, so addressing the underlying problem with gutter systems or a foundation drainage system and setting up a preventative solution like a dehumidifier is necessary.

It’s not the number of weep holes that should be of concern to builders but rather their spacing. Weep holes are usually spaced anywhere between 16 inches on center when using round tubes or wicking materials and 24 inches on center when using open-head joints. This is a more conservative spacing than the 33-inch maximum spacing on center that’s mentioned in the International Residential Code. All in all, the total number of weep holes a brick exterior should have will depend on the size of the structure.

In most climates, contractors recommend closing your crawl space vents in winter. Keeping them shut protects your crawl space from freezing temperatures, pests, and cool breezes that can lead to chilly floors in your home. However, it's often best to speak with a local crawl space team about your specific design and its relationship to the winter season.

Sandbags are the most common and efficient way to create a flood barrier at home. Some local authorities pass them around to homes before the risk of a flood. Otherwise, you can use flood-proof house materials, like burlap or woven plastic bags, to make sandbags and fill them with sand or cat litter. Make sure that when you stack them, they’re tightly laid on top of each other, creating the effect of a firm wall against accumulating water.

The Flagstaff, AZ homeowners’ guide to basement waterproofing services

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

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