One inch of rain falling on one acre of ground is equal to roughly 27,000 gallons of water.

A one-inch rain will collect 600 gallons from a 1,000 square foot roof.

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Why is my basement wet?

Your home is typically the largest investment you will make.  One third of it is under inches of water, what can you do...

  • Determine where the water is entering.  To solve the problem, identification of the entry location is imperative.  There are 6 places where water can enter the basement.
  1. Where floor meets wall (cove joint)
  2. A visible wall crack
  3. A visible floor crack
  4. A bulk-head or stairway entry area
  5. A window
  6. Over the top of the foundation (where the foundation meets the wood framing of the home)
  • Call a professional.  Basement waterproofing is not a do-it-yourself project.

Why does this happen?

Water will always find the path of least resistance.

When your house was built, the contractor dug a hole into the ground.  The soil they dug into is typically hard and compact (this is known as virgin soil).  Virgin soil does not absorb water as quick as loose soil would so when it rains the virgin soil holds the water.  Basically like a swimming pool.

The contractor then sets the footing, walls then floor (slab).  The soil they had removed from the hole is then pushed back against the walls (back fill).  The back fill which was once virgin soil is now aerated.  This looser soil allows
water to absorb and pass through it.  The water collects around the footing, walls and slab of your home (like a swimming pool).  This creates in many cases a "false" water table around your home.

In some inst
ances (more often on newer homes), an exterior perimeter drain is installed on the exterior of the house on the outside of the footing.  It is a perforated pipe typically surrounded by 3/4 inch crushed stone.  The down side of this system is three fold.  First - as they push the back fill against the walls of the house, they are typically using heavy machinery over a thin pipe which can easily be crushed.  Second - as water soaks through the back fill, dirt is forced down and particles are trapped inside the pipe.  Over time the pipe will become clogged.  Third - these external drains are typically run to a "dry well".  If the water has filled the dry well it has no place to go so it backs up in the pipe.


As the exterior drainage fails, water will no longer drain freely and backs up in the back fill area.  As more water enters the back fill it creates hydrostatic pressure.


The hydrostatic pressure p
ushes water through any of the six entry points mentioned above.

Custom Basement Waterproofing Solutions

Our basement waterproofing technicians are proven, courteous, highly trained professionals.  Coupled with our innovative water control systems, we provide the best waterproofing services anywhere - at any price. Honest service and timely installs using the right equipment - that is our promise to you!

What Is A Basement Waterproofing System

A basement waterproofing system Keeps water from entering your basement.  There are four components of a typical system:
  1. Interior drain tile
  2. protection from future wall cracks
  3. sump basin
  4. sump pump
When these components are installed properly, a guarantee will be given that no ground water will pass across your basement floor for any reason.

Exterior French Drain

We have installed exterior french drains but in most cases I do not recommend them.  These drains are typically a drain tile that is in the ground roughly 8 - 10 inches below the surface area surrounded by crashed stone.  This is an alternative to gutters on a house and may reduce the amount of water building up around your foundation. They will NOT STOP hydrostatic pressure.  Also, during the times you need them most (ground thawing and spring rains) the ground is still partially frozen limiting their effectiveness.

Interior vs Exterior Perimeter Drainage

It all depends on who you ask.  If you ask a landscaper or construction company, they would tend to lean heavily toward exterior. A professional basement waterproofing company would be just the opposite.  Here are some pro's and con's for each.  The word "typical" will be used a lot since variations occur depending on circumstances.

  1. Cost - Exterior drainage must be placed below basement floor level to be effective.  In most cases it is 6 or more feet below outside grade which means they are bringing in a backhoe.  Exterior costs typically double that of internal systems. Residual costs also need be kept in mind (ie. replacing decks, shrubbery and lawn).
  2. Damage - Exterior drainage must be close to the foundation of the house. Typically this means loss of shrubs, plants, patios, decks and anything else not associated with foundation of the house.  Internal systems open the concrete floor roughly 6 - 8 inches wide around the full perimeter of the basement and must be placed right next to the concrete walls.  If you have a finished basement this typically means removing roughly 4 feet up on the walls in the area being worked on.  Do not forget to factor these costs to those that apply with the method being used.  These residual costs to replace these items will drive up the initial estimate.
  3. Clogging - Both systems can clog.  Not many companies will tell you that. In both instances the system being installed is surrounded by crushed stone which filters out a majority of sand and sediment from entering the pipe.  Over time that sediment can build to a point which closes off the flow of water through the pipe.  Most interior systems prepare for this by installing some type of access into the system so it can be flushed.  Exterior systems have additional vulnerabilities.  As these systems are back filled, they can be crushed by the heavy equipment as well as tree roots grow toward water and can strangle or infiltrate the pipe.
  4. Warranty - Both system installers will warranty their work if they are a reputable company, at least for a period of time.  Only a reputable basement waterproofing company will warranty their system for the life of the building.

Give us a call at 978.401.9411 or

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Contact Mass Basement Waterproofing for all your basement water issues.  We handle it all:  cracked concrete, foundation repair, crack injections, fieldstone walls, crawl spaces, sump pumps, sub floor drainage systems, dry basements, waterproofing, french drains.  No matter where in Massachusetts you are: Worcester, Leominster, Fitchburg, Orange, Greenfield, Leverett, Amherst, Brookfield, Princeton, Auburn, Millbury, Webster, Holliston, Framingham, Concord, Chelmsford or any of the surrounding areas...

Overall we are very pleased with the job from the initial consult to the finished product.
Alan V.    Townsend, MA