Concrete, Masonry & Paving · Property Services
Foundation Crack Injection & Sealing
Cracks in a basement or foundation wall can let in water, insects and radon, and some indicate movement. Injection seals the crack from the inside, stopping leaks and often restoring strength. NorTech connects you with vetted concrete specialists who set their own price and assess whether the crack is stable.
Need more hands? Pick a company that sends crews and choose how many technicians. Want a second pro for a different job? Add one right after you book.
Understanding what the crack is telling you
Hairline vertical cracks are often caused by shrinkage and are not serious, while horizontal or stair-step cracks and cracks that keep widening can signal soil pressure or settlement. A specialist measures the width, checks for displacement between the two sides and looks for moisture and drainage problems around the foundation. They may recommend a structural engineer for suspicious cracks. Photograph the cracks and mark them with dates to track any movement over time. Describe when you first noticed each crack, whether it leaks after rain and whether it has changed width, because that history guides the choice of material.
Epoxy versus polyurethane injection
Epoxy bonds the crack and can restore strength, and it works best on dry cracks. Polyurethane expands to seal leaking cracks and stays flexible, which suits cracks that may move slightly. The specialist installs ports along the crack, seals the surface, injects the material from the bottom to the top and removes the ports once it has cured. The wall is then cleaned and inspected. Injection is quick and far less disruptive than excavating from outside.
Fix the water source
Injection seals the crack from the inside, but water pressure from the outside remains. Improve grading, extend downspouts, clean gutters and consider drains if water collects against the foundation. Watch the cracks after wet weather. If movement continues, structural repair may be needed. Keep records for resale and insurance, and ask the specialist for advice on monitoring. Keep dated photos and measurements of every crack with the invoice, and look again after the first heavy storm to confirm the repair is holding.
When to book foundation crack injection & sealing
Frequently asked
Foundation Crack Injection & Sealing — common questions
Didn’t find your answer? Nova, our AI assistant, is in the chat bubble in the bottom-right corner and can help anytime.
What homeowners say
Foundation Crack Injection & Sealing reviews
Verified reviews from every city where NorTech connects customers with providers will appear here.
Be the first foundation crack injection & sealing review
Your pro backs the work with a workmanship warranty — if covered work is not right, your pro makes it right, free. Book with confidence and tell the Bay Area how your pro did.
Book Foundation Crack Injection & SealingCheck your coverage
Is Foundation Crack Injection & Sealing available near you?
NorTech connects you with vetted local providers for foundation crack injection & sealing. Enter your ZIP to check coverage and see your price.
Enter your ZIP code and we’ll point you to your local hub.
Explore more
Related home services
Homeowners who book foundation crack injection & sealing often need a hand elsewhere too. Browse related NorTech services — pricing set by local pros, vetted local providers, and a guarantee or warranty suited to each service.
Concrete Driveway Replacement
Removal of an old driveway and installation of a new reinforced concrete driveway by a licensed…
Learn moreConcrete Patio & Slab Installation
Pouring new concrete patios and slabs for outdoor living, sheds, hot tubs and equipment by a con…
Learn moreStamped & Decorative Concrete
Stamped, stained and decorative concrete for patios, pool decks, driveways and entries by a conc…
Learn moreConcrete Walkways & Steps
New concrete walkways and steps for front entries, side yards and gardens, built by a concrete c…
Learn moreConcrete Slab Leveling (Mudjacking & Foam Lifting)
Lifting and leveling sunken concrete slabs with mudjacking or polyurethane foam, by a concrete s…
Learn moreFoundation Footings & Stem Wall Pour
Pouring foundation footings and stem walls for additions, new homes and detached buildings by a…
Learn moreCurb, Gutter & Concrete Flatwork
Concrete curbs, gutters, aprons and flatwork by a licensed concrete contractor for driveways, pa…
Learn moreBlock Wall & Garden Wall Construction
Construction of concrete block and garden walls by a licensed mason: footings, reinforced block,…
Learn moreBrick & Stone Veneer Installation
Installation of brick and stone veneer on walls, fireplaces, columns and entries by a licensed m…
Learn moreBook in minutes
Ready to book foundation crack injection & sealing?
Choose a background-checked local provider, see your price the moment you enter your ZIP, and lock in a time that works — backed by your pro’s 90-day workmanship warranty.
Prefer to compare bids yourself?Get quotes from independent local contractors — you pick who does the work.Compare →