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New England weather is brutal on foundations. Keller has provided permanent solutions to thousands of homeowners since 1972 — backed by a lifetime transferable warranty.
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Most water related property problems get worse — not better — over time. Here are some of the warning signs you shouldn’t ignore.
Mold & Musty Smells
Mold and mildew thrive wherever moisture is present, and once established in your basement, spores can spread through your entire home’s air supply affecting your family’s health
Rust on Appliances
Rust forming on appliances, fuse boxes, or metal fixtures in your basement is a telltale sign of excessive moisture — and a warning you shouldn’t ignore.
Damp Spots On Walls
Dark or wet patches on basement walls signal that water is actively seeping through your foundation and will only worsen without proper waterproofing.
Peeling Paint
Paint bubbling or peeling off basement walls is a sign that moisture is pushing through from behind — and no amount of repainting will fix it until the water source is addressed.
Dry Rot
Dry rot in wooden beams, joists, or framing is caused by chronic moisture exposure and silently eats away at your home’s structural integrity long before it becomes visible.
Bugs and Pests
Insects like centipedes, silverfish, and earwigs are drawn to damp environments, so a sudden increase in basement pests is often one of the earliest signs of a moisture problem.
Chalky White Substance
That white powdery residue on your basement walls is efflorescence — a mineral deposit left behind as water moves through concrete, confirming that moisture is actively infiltrating your foundation.
Don't wait until small problems become expensive disasters. A free inspection costs you nothing.
Wall anchors, carbon fiber straps, and helical piers stop structural movement and permanently stabilize bowing, leaning, or cracking foundation walls before small problems become major ones.
Yard grading, drywells, and downspout corrections designed to stop water at the source — before it ever reaches your foundation walls.
Deteriorating mortar joints, spalling brick, and cracked block walls compromise both structure and waterproofing. We restore them to a watertight, load-bearing condition.
Full-Service Solutions
Every Waterproofing Problem,
One Trusted Source
Most companies specialize in one thing. Keller handles the full picture — from the water coming in, to the structure holding it back, to the drainage and systems keeping it away.
One experienced company,
One lifetime warranty,
One call.
100,000+ Satisfied Customers Since 1972
As a Boston family-owned and operated business, we treat every basement as if it were our own. No shortcuts, just long-term structural integrity.
- No Subcontracting - Our Own Trained Crews
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- Serving Boston & New England Since 1972
Things You Need To Know About Basement Waterproofing
What Causes Foundation Cracks?
There are 3 basic reasons for concrete to crack:
Shrinkage – This happens shortly after a house is built. The poured concrete foundation dries too quickly, shrinks and hairline cracks appear.
Settling – Typically this happens for only a short period after the house is built. The foundation is placed onto ground that still wants to compress. If the compression is minor, the cracks usually are also minor. However, if the ground continues to compress for a while, the existing foundation cracks get progressively wider and new ones may appear over time.
Movement – This is the most common cause of cracks we see. When the ground around the foundation moves and shifts, it causes cracks. As movement continues, these cracks worsen and multiply.
Are Floor Cracks Different Than Wall Cracks?
Yes. Cracks in basement floors may happen for the same reasons as above, but they are different than wall cracks.
Floor cracks typically don’t leak unless an excessive amount of water is accumulating under your basement floor. If you have this problem, consider installing a below the floor drainage system. Before you do that though, make sure you check your sump pump. Many times water coming through the cracks in the floor is a sign your sump pump has stopped working properly.
Why floor cracks are harder to seal: Sealing basement floor cracks is difficult, if not impossible. Any waterproofing product you try to stick to the surface of the floor will eventually fail because the constant wetness of the concrete will keep it from adhering well or permanently. The problem is that the best topical crack repair is one applied on the side of the concrete where the water first enters. Unfortunately, in the case of basement floor cracks, the water is entering from the underside that you can’t reach.
Does The Type of Foundation Matter?
Absolutely. Crack repair methods depend on the type of foundation that’s breaking.
Poured Concrete Foundations: Cracks in a poured concrete foundation can be filled with a flexible, expanding urethane sealant using an injection method because these walls are solid and monolithic.
Block, Brick, or Stone Foundations: Cracks in block, brick, or stone cannot be injected because those walls are made up of many pieces, much like a puzzle, that are held together with mortar which is porous. Cracks in these foundations are best repaired from the outside using a flexible, trowel-on elastomeric membrane. If outside repairs aren’t practical or affordable, then a tear resistant liner can be installed inside to protect your basement from moisture seeping in. An Interior Drainage System also needs to be installed so the moisture that accumulates behind the liner has somewhere to drain.
What About Epoxy Repairs?
Can Previously Repaired Cracks Be Fixed Again?
Should I Fix All My Cracks at Once or Just the Leaking Ones?
Fix them all at once. Here’s why:
All cracks eventually leak. Fixing only the leaking ones just delays the inevitable, and costs more because you have to pay more than once to bring the repairman out again.
Water seeks the path of least resistance. If there are multiple cracks some will provide less resistance to the water than others so they leak first. Once the cracks are sealed, the water will look for the next easiest path which is typically the cracks that weren’t previously leaking.
Save money: When you are having cracks repaired, take advantage of quantity discounts usually available and have them all fixed at once.
READY FOR A DRY BASEMENT?
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