Monitor
Hairline Vertical Cracks
Thin vertical cracks in poured concrete are usually shrinkage from when the concrete cured. They're common and often stable, but they can still let water in.
Typical fix: seal or inject if it leaks, then monitor.
Foundation & Basement Repair in Massachusetts
Cracked walls, leaking basements, bowing block, and crumbling stone foundations. We find out why it's happening and fix the cause, not just the crack you can see.
4.9 ★ Rated by Local Clients
Licensed & Certified Team
15+ Years of Foundation & Structural Experience
Free written estimatesWe inspect inside and out, explain what we find, and price the fix before any work starts.
Masonry Foundation Repair for Massachusetts Homes
Your foundation holds up the entire house and keeps the ground out of your basement. When it starts to crack, leak, or move, the problem rarely stays small. Water finds its way in, freeze-thaw cycles widen every gap, and soil pressure keeps pushing against walls that have already been weakened.
Kings Masonry & Construction repairs foundations and basements for homes, multi-families, and commercial buildings across Massachusetts, from Greater Boston to the South Shore and the South Coast. We work on every type of foundation found in New England, including the ones many contractors avoid.
Most foundation problems come down to three things: water, soil pressure, and aging masonry. A crack is usually the symptom. Before we recommend anything, we look at grading, downspouts, drainage, wall type, and how the crack has behaved over time, so the repair addresses what's actually causing it.
Some jobs are a single crack injection finished in a day. Others need repointing, reinforcement, drainage, and waterproofing together. Either way, you get a clear explanation, photos of what we found, and a written estimate before anything is scheduled.
- FieldstonePre-1920 homes
- BrickOlder city homes
- Poured ConcreteMid-century on
- Concrete BlockAdditions & garages
Foundation Crack Repair: What Each Crack Means
Not every crack is a structural emergency, and not every crack is harmless. The direction, width, and location of a crack tell us a lot about what's behind it. Here's how we read them.
Repair
Wider Vertical Cracks
Once a vertical crack is wider than about an eighth of an inch, or one side is offset from the other, there's movement or settlement worth addressing.
Typical fix: injection and evaluation of drainage and settlement.
Repair Soon
Diagonal Cracks
Cracks running at an angle, often from the corners of windows or the top of a wall, usually point to uneven settlement under one part of the foundation.
Typical fix: crack repair plus a check of soil, drainage, and footing.
Repair Soon
Stair-Step Cracks
In brick and block walls, cracks that follow the mortar joints in a stair pattern show the wall is shifting. They tend to grow with each freeze-thaw season.
Typical fix: repointing, unit replacement, and reinforcement if needed.
Call Now
Horizontal Cracks
A horizontal crack, especially with the wall bowing inward, means soil and water pressure are pushing the wall. This is the most serious crack pattern we see.
Typical fix: structural stabilization and drainage correction.
Repair
Cracks With Water or White Residue
Damp edges, rust stains, or white efflorescence along a crack mean water is moving through it. Even a small crack becomes a leak path in spring.
Typical fix: leak repair and a look at grading and downspouts.
TESTIMONIALS
What our clients are saying
Foundation & Basement Masonry Services
From a single leaking crack to a full basement waterproofing system, these are the foundation repairs we handle most. Open any service to see what it involves.
01Foundation Crack Repair
Cracks in poured concrete walls are sealed from the inside with low-pressure injection that fills the crack through the full thickness of the wall. Wider or active cracks get a structural repair, and we look at why the crack formed so it doesn't simply open somewhere else.
- Epoxy injection for structural cracks
- Flexible polyurethane for leaking cracks
- Settlement and drainage evaluation
02Stone & Brick Foundation Repointing
Fieldstone, granite, and brick foundations lose mortar over decades, leaving voids that let in water, cold air, and pests. We clean out loose material, fill deep voids, and repoint with a mortar compatible with old masonry, which is usually softer and more breathable than modern cement.
- Fieldstone and rubble foundation repointing
- Void filling and stone resetting
- Brick foundation repair and replacement
03Basement Wall Stabilization
Walls that bow, lean, or show horizontal cracks are being pushed by soil and water pressure. Depending on the wall type and how far it has moved, stabilization can include steel reinforcement, partial rebuilding, and relieving the pressure that caused the movement.
- Bowing block and brick wall repair
- Steel bracing and reinforcement
- Partial wall rebuilding where needed
04Interior Basement Waterproofing
When digging outside isn't practical, water can be managed from the inside. An interior perimeter drain collects water at the base of the wall and carries it to a sump pump before it reaches the floor.
- Interior perimeter drainage
- Sump pump installation
- Wall vapor barriers and dimple board
05Exterior Waterproofing & Drainage
Exterior waterproofing stops water before it reaches the wall. We excavate along the foundation, repair and seal the outside face, apply a waterproof membrane, and add drainage and grading so water moves away from the house.
- Excavation and exterior membrane
- Footing drains and French drains
- Grading and downspout corrections
06Foundation Leak Repair
Many basement leaks come through specific weak points rather than the wall itself: tie-rod holes in poured walls, the cove joint where wall meets floor, pipe penetrations, and old window or coal chute openings. We seal each source individually.
- Tie-rod hole and snap-tie sealing
- Cove joint leak repair
- Pipe and utility penetration sealing
07Parging & Wall Resurfacing
Parging is the cement coating on the exposed part of a foundation. When it cracks and falls off, water gets behind it and into the masonry. We remove loose parging, repair the wall underneath, and apply a new coat that bonds properly.
- Removal of failed parging
- Masonry repair underneath
- New parge coat and finish
08Mold Cleanup, Cleaning & Repainting
Once the moisture source is fixed, we clean up mold near the floor line, clean basement walls, and apply masonry-appropriate coatings. Exposed exterior masonry can be treated with a breathable, clear water repellent.
- Mold removal after the leak is fixed
- Basement wall cleaning and repainting
- Breathable water repellents and sealants
Boston-Area Basement & Foundation Problems We Fix
Old housing stock, dense clay and filled soils, high groundwater, and long freeze-thaw winters make Greater Boston hard on foundations. These are the problems we're called for most.
01
Fieldstone Foundations Losing Mortar
The problem
Many Boston-area homes built before 1920 sit on fieldstone or granite rubble foundations. A century of groundwater washes the mortar out, leaving gaps where water, cold air, and rodents get in.
How we fix it
We clean out failed mortar, fill voids, and repoint with a compatible mix, then correct grading and drainage outside so the wall stays drier.
02
Spring Leaks After Snowmelt and Nor'easters
The problem
Basements that stay dry most of the year take on water in March and April, when snowmelt and heavy rain saturate the soil and push groundwater against the walls.
How we fix it
We find the entry points, seal cracks and joints, and add interior or exterior drainage so seasonal water has somewhere to go besides your floor.
03
Leaking Tie-Rod Holes and Cove Joints
The problem
Poured foundations from the mid-1900s on often leak through the small tie-rod holes left by the concrete forms, or along the joint where the wall meets the floor slab.
How we fix it
Each tie-rod hole and leaking joint is sealed individually. For cove joint leaks, interior drainage relieves the water pressure that's pushing it through.
04
Bowing Block Walls
The problem
Concrete block walls, common in additions and garages, can bow inward when saturated clay soil freezes and expands against them year after year.
How we fix it
We stabilize the wall with reinforcement, rebuild sections that have moved too far, and reduce the soil pressure with drainage.
05
Downspouts and Grading Sending Water Inside
The problem
On tight city lots, downspouts often empty right at the foundation and the ground slopes toward the house. Every storm puts gallons of water directly against the wall.
How we fix it
We extend and redirect downspouts, regrade where possible, and install drains so roof water is carried away from the foundation.
06
Crumbling Parging and Old Patch Repairs
The problem
Decades of quick fixes, like cement smeared over cracks or coatings painted over damp walls, trap moisture and hide the real damage until pieces start falling off.
How we fix it
We remove failed patches and parging, repair the masonry underneath, and refinish it with materials that let the wall breathe.
Signs You Need Basement Wall Crack Repair
Foundation problems show up both inside the basement and around the outside of the house. If you notice any of these, it's worth having the foundation looked at before the next wet season.
Inside the Basement
- 1Cracks in walls or the floor that are new or getting wider
- 2Water on the floor or damp spots along the base of the walls
- 3White powder (efflorescence) or rust stains on the masonry
- 4Musty odor or mold near the floor line
- 5Walls that bow inward or crumble when touched
Outside & Upstairs
- 1Doors and windows that stick or no longer close properly
- 2Gaps between the foundation and the sill or siding
- 3Cracked or flaking parging on the exposed foundation
- 4Soil sloping toward the house or downspouts emptying at the wall
- 5Diagonal drywall cracks above doors and windows
One sign alone doesn't always mean a serious problem. Several together, or any that are getting worse, mean it's time for an inspection.
Have a masonry & construction
project in mind? Let’s talk.
We handle brick repairs, chimney rebuilds, repointing, walkways, stairs, and other
masonry services with expert care and reliable results.
Foundation Waterproofing: Interior vs. Exterior
There's no single right answer for a wet basement. The right approach depends on where the water comes from, the type of foundation, and what's around the house. Here's how the two main methods compare.
| Interior Waterproofing | Exterior Waterproofing | |
|---|---|---|
| How it works | Collects water that enters at the base of the wall and pumps it out | Stops water at the outside face of the wall before it gets in |
| Best for | Cove joint leaks, high groundwater, homes with tight lot lines | Leaks through the wall itself, failing exterior coatings, new foundations |
| What's involved | Perimeter trench inside, drain pipe, sump pump, wall membrane | Excavation, wall repair, waterproof membrane, footing drain, backfill |
| Disruption | Work happens inside; basement needs to be cleared along the walls | Digging around the house; landscaping and walkways are affected |
| Protects the wall | Relieves water pressure but the wall still gets wet outside | Keeps the masonry itself drier and protected from freeze-thaw |
| Often paired with | Crack injection, dehumidification, sump backup | Grading, downspout extensions, French drains |
+
Many Massachusetts homes get the best result from a combination: sealing the specific leak points, correcting grading and downspouts outside, and adding interior drainage where groundwater is high. We'll recommend the simplest approach that will actually keep your basement dry.
How We Handle Basement Stabilization & Repair
Foundation work involves your home's structure, so every job follows the same careful process. You always know what we found, what we recommend, and what happens next.
(857) 249-5127- 1
Inspection Inside & Out
We look at the walls, floor, cracks, and leak points inside, and at grading, downspouts, and drainage outside.
- 2
Cause, Not Just Symptom
We explain what's causing the problem, with photos, and whether it needs a structural engineer's input.
- 3
Written Estimate
A clear scope, the repair method, materials, and price in writing before anything is scheduled.
- 4
Prep & Protection
We clear and protect the work area, mark utilities before any digging, and plan around the weather.
- 5
Repair & Waterproofing
Crack repair, repointing, stabilization, or drainage, done with materials suited to your foundation type.
- 6
Final Walkthrough
We show you the finished work, explain what to watch for, and leave the site clean.
What Affects Foundation Repair Cost in Massachusetts
Foundation repair is always priced after an inspection, because two cracks that look alike can need very different fixes. These are the factors that move the price most.
- 1
Foundation Type
Fieldstone, brick, poured concrete, and block each need different materials and methods.
- 2
Size and Number of Problems
One leaking crack is a short job. Several cracks plus leak points add time and material.
- 3
Structural Movement
Bowing or shifting walls need reinforcement, which costs more than sealing a stable crack.
- 4
Interior or Exterior Approach
Excavation outside costs more than interior work, but protects the wall itself.
- 5
Access
Finished basements, decks, walkways, and landscaping can add prep and restoration.
- 6
Drainage Corrections
Grading, downspout work, and drains often make the repair last, and are part of the price.
Every estimate is written and itemized, so you can see exactly what you're paying for.
Where We Work
Foundation Repair Near You in Massachusetts
We repair foundations and basements throughout Greater Boston, the South Shore, Plymouth County, and the South Coast.
Greater Boston Metro
Boston, MABrookline, MANewton, MADedham, MA
South Shore
Braintree, MANorwood, MAHingham, MAWeymouth, MARockland, MAAbington, MACohasset, MA
Brockton & Surrounding Towns
Brockton, MARandolph, MAStoughton, MAHolbrook, MARaynham, MAPembroke, MAMarshfield, MAKingston, MA
Plymouth County
Taunton, MAPlymouth, MACarver, MAMiddleborough, MALakeville, MANorton, MAMansfield, MA
South Coast
Wareham, MAMarion, MAMattapoisett, MARochester, MAAcushnet, MANew Bedford, MADartmouth, MAWestport, MAFairhaven, MA
Don't see your town listed? We likely still cover your area. Contact us for a free estimate.
Request a Free QuoteFoundation & Basement Repair FAQs
Straight answers to the questions Massachusetts homeowners ask us most.
Do foundation cracks always mean a serious problem?
No. Thin vertical cracks in poured concrete are often shrinkage and may only need sealing. Horizontal cracks, bowing walls, stair-step cracks, and cracks that keep getting wider point to movement and should be looked at soon.
How long does foundation or basement repair take?
Most crack repairs and leak sealing are finished in a day. Larger jobs such as waterproofing or wall stabilization usually take one to three days, and exterior excavation can take longer depending on access.
Will you need to dig around my foundation?
Not always. Many cracks and leaks can be repaired from inside. Excavation is recommended when the outside of the wall needs repair or a waterproof membrane, or when drainage at the footing has failed.
Can old fieldstone foundations be repaired?
Yes. Fieldstone and granite foundations can last for generations when they're repointed with compatible mortar and kept dry. Replacing them is rarely necessary unless sections have collapsed or moved significantly.
Why does my basement only leak in the spring?
Snowmelt and spring rain saturate the soil and raise groundwater, which pushes water through cracks, tie-rod holes, and the joint between the wall and floor. Fixing those entry points and improving drainage usually solves seasonal leaks.
Should I waterproof from the inside or the outside?
It depends on where the water comes from and what's around the house. Interior drainage works well for groundwater and cove joint leaks. Exterior waterproofing protects the wall itself. We'll explain which fits your situation.
Do I need a structural engineer?
For most crack and leak repairs, no. For bowing walls, significant settlement, or work that affects the structure, an engineer's evaluation may be recommended or required, and we'll tell you up front.
Can foundation repair be done in winter?
Yes, much of it can. Interior crack injection, leak sealing, and interior waterproofing can be done year-round. Exterior excavation and mortar work depend on ground and air temperatures.
What happens if I ignore a foundation problem?
Most foundation problems get worse with every wet season and freeze-thaw cycle. A leak can lead to mold and damaged finishes, and a moving wall gets harder and more expensive to stabilize the longer it's left.
Do you offer free foundation repair estimates?
Yes. We inspect the foundation, explain what we found and what we recommend, and give you a clear written estimate before any work begins.
Skilled in brick, stone, and chimney work, we deliver durable, high-quality masonry services that keep Boston homes safe, strong, and looking their best.
Skilled in brick, stone, and chimney work, we deliver durable, high-quality masonry services that keep Boston homes safe, strong, and looking their best.