Here at Colonial, the health and well-being of our employees and our clients is top priority to us. As the world is in protection mode, we too are making strides to prevent the spread of the Coronavirus. Sanitation practices throughout our locations has been ongoing and our employees suit up in brand new hazmat suits with the best respirators in the business. Any employee with a sign of fever, chills or cold is asked to stay home.

When insulating your home, the installers are now approaching clients suited up, to rest everyone's minds at ease and continue the insulation work without worry of spreading germs. Prayers go out to everyone affected by this terrible virus and please support small business as much as possible during these difficult times.

New England's Premier Insulation Company


Providing Insulation & Fireproofing Services Year Round

Office Locations

Rindge, NH • Saco, ME • Marlborough, MA

Water in basements can be a nightmare that happens more often than you can imagine. Whether it’s a bad storm – or several – or a regular occurrence, basement water and moisture is a terrible thing. Mold, musty smells and damp walls can be a result of wet basements.

Spray Insulation can transform your basement into a quiet, dry space for your family or that extra storage you need. Creating an air seal can not only hold back water but it will save you money every month on your energy bills and make the space more comfortable in winter and summer.

Closed Cell Spray Foam

In New England, we are more prone to water and moisture problems. We recommend closed cell spray foam because it is an absolute vapor barrier, will not allow moisture to move through it, and is water resistant. An application of 2 inches, and 3 inches respectively will provide the air seal needed. If your basement is made of stone-and-mortar, closed cell polyurethane spray foam is the best type of insulation that will help with waterproofing your basement.  Avoid polyethylene vapor barriers. Polyethylene should never be used in basements. It can seal in moisture leading to rot or mold.

How Much Does it Cost to Insulate a Basement with Spray Foam?

The average cost to insulate a basement with spray foam insulation can run anywhere between $1,500 and $6,000.

The size of the basement is the top factor when determining the cost to insulate the space. We will give you a free estimate for your basement waterproofing needs. We will let you know if you are a good candidate for basement spray foam. The rough estimate includes the walls, ceiling, and rim joist.


What is the Process for Installing Foam Insulation in a Basement?

The average homeowner’s basement which includes walls, ceiling and rim joist, will take four to six hours to insulate. Open cavities of the walls and areas mentioned will be sprayed. An idea situation for basement wall studs is that they are furred out about a quarter an inch to a half inch. This will allow the spray foam to get behind the stud to prevent any thermal bridging from happening. Thermal bridging – or heat bridge – is an area of a structure that develops a significantly higher heat transfer than the surrounding materials. This will cause a reduction in insulation of the structure. This bridging occurs most often in studs of exterior walls, attics, and roof structures.

You will be required to have all items in the basement moved away from the walls and covered before the crew arrives for your foam insulation installation.  Any old insulation will be removed and taken away so the new foam can be applied.

The crew will then run a hose into the basement that applies the spray foam on to your ceiling, exposed wall and rim joist. Any excess foam will be cut so the drywall or paneling will not be obstructed.

What Services Should be Included When Insulating a Basement?

At Colonial Insulation, we offer FREE In-Home estimates and are here for you from start to finish with your basement waterproofing project.


  • Free Estimate
  • Affordable Financing Available
  • Preparation and Cleanup for insulation job

Give us a call at 1-800-947-8870 to schedule your free in-home estimate or email us at [email protected]

Benefits of Spray Foam

1. Up to 50% Energy Savings

Heating and cooling account for up to 70% of your home’s energy use. By insulating you would be able to save up to 40% on not only your winter, but also your summer energy costs.

2. Healthier Home

By insulating locations such as walls, attics, and basements, you are creating a barrier to moisture, pests, and mold. Spray foam creates an environment in your home that is crisp, dry, and in which you can breathe freely.

Room interiors and lifestyle

3. Home Value

Between winter storms, Nor’easters, and the summer heat, homes in New England have to face a lot. That is why when new homeowners are shopping for their place to call home, they value insulation due to its energy savings and its ability structurally strengthen a home 75-200%.

4. Air-tight Seal

The air-tight seal of spray foam gives you the advantage of insulating difficult to reach and uneven spaces without compromising your warmth, or all of the barriers that spray foam provides against the environment.

Need an estimate?

Fill out the form below to receive a callback from a representative to schedule your free no obligation estimate, or call 800-947-8870.

Quality Product

We use a non-hybrid spray, which means that we do not mix inferior insulation with our spray foam. This makes our spray foam more dense for a tighter seal, and your home much warmer for it.

State of the Art Machinery

We make sure to have the finest machines in the industry so that we can seal your house tightly. Our machines allow us to give you an even spray, which ensures that the spray foam is perfectly attached.

Expert Technicians

Our technicians are not only certified by OSHA for Safety, but they also undergo a thorough training process which trains them to solve problems on the spot, to use high tech machinery, and to give you the high-quality service that you deserve.

Friendly Service

Our estimators and technicians value you, your time, and your business. We do our very best to ensure that this experience is as transparent and as easy as it could be so that you know you are getting the finest service in New England.