Guardian Basement Waterproofing

What They Do

Water DamageMold

• Basement remodeling
• Exterior structural repairs
• Flooring repair
• Interior structural repairs
• Waterproofing
• Mold remediation
• Basement Sealing
• Basement Waterproofing
• Battery Back-Up Systems
• Bowed Walls
• Crawlspace Encapsulation
• Crawlspace Issues
• Crawlspace Waterproofing
• Drain & Sump Pump Repair
• Drain Pipe
• Drain Tile Systems
• Exterior French Drains
• Exterior Waterproofing
• Flooded Basement
• Foundation Repair
• Foundation Waterproofing
• Free Estimate
• French Drain System
• French Drains
• Interior Waterproofing
• Mold Problem
• Repair Crack Walls
• Sump Pump Installation

In Their Own Words

Guardian Basement Waterproofing is a leader in the waterproofing industry with more than 40 years of experience serving the Maryland, Washington DC, and Pennsylvania areas. Guardian’s skilled and knowledgeable technicians install state of the art basement waterproofing systems that completely and permanently stop foundation water leaks. Guardian specializes in basement waterproofing, basement finishing, crawl space waterproofing repair and foundation repair in Baltimore, Anne Arundel, Carrol, Harford and Howard County. Let our company handle your basement waterproofing needs.

Written by the business on its public profile. We have not verified these claims.

Before You Call Guardian Basement Waterproofing

1. Do you take moisture readings every day and will you give me the drying log?
2. Are your technicians certified in water damage restoration?
3. Where do you think the moisture is coming from, and who fixes it?
4. Will you set up containment and negative air, and how will you protect the rest of the home?

Ask for a Maryland Home Improvement Commission license number and look it up with the state. Also ask for proof of insurance, industry certification for the restoration crew and lead safe certification for any pre-1978 home.

How Their Reviews Break Down

Counts from public listings as of September 23, 2026. A handful of reviews says less than a few hundred.

Read This While You Wait

• DIY with careWhat to Do in the First 24 Hours After Water DamageAn hour by hour plan for the first day after water damage. Make it safe, stop the source, document, remove water and start drying before mold can start.
• DIY with careSafe DIY Mold Cleanup for Areas Under 10 Square FeetA step by step method to clean up mold under 10 square feet safely, with the gear to buy, what to throw away, why bleach is not the default, and when to stop.
• DIY friendlyWasher, Dishwasher, Fridge and Toilet Supply Line LeaksHow washer hoses, dishwasher lines, ice maker tubing and toilet supply lines fail, how to clean up each kind of leak, and how to replace a line yourself.
• DIY with careAttic Mold on Roof Sheathing, Causes and FixesWhy mold grows on attic roof sheathing, how to find the cause, the fixes that stop it for good, and how to tell a cosmetic stain from a roof that needs work.