Foundation Waterproofing Sprayers for Professionals

November 19, 2012

Foundation waterproofing spray equipment can be the biggest capital expenditure for a waterproofing contractor when they are starting out. It is important to purchase the right piece of spray equipment for your business. Too large of a piece of equipment and it may be difficult to stay above water. Too small and you may not be able to spray enough foundations in a day for your customers.

It is also important to purchase a foundation waterproofing sprayer that works for the type of material that you are spraying. The most common type of waterproofing used in residential new construction today is asphalt based products. Asphalt based products have the advantage of being relatively inexpensive and readily available. They are formulated to meet national and local building codes and in some cases have been on the market for decades.

Dampproofing vs Waterproofing      

The first thing a waterproofing contract must know is the difference between dampproofing and waterproofing. They are not the same thing. Traditionally, foundations have been coated with asphalt-based dampproofing. Dampproofing does an excellent job of keeping the dampness out of a basement. That is it stops water vapor from penetrating from the soil around the basement and into the living area of the basement. It must be noted that dampproofing does not stop water under hydrostatic pressure or cover cracks that develop in a foundation.

According to national building codes, foundation waterproofing has to do three things to be considered a true waterprofoing material.

  1. It must stop water vapor from penetrating to the interior
  2. It must span shrinkage cracks that develop in a foundation wall
  3. It must prevent water under hydrostatic pressure from penetrating into the basement

The most common foundation waterproofing material used today in new residential construction is polymer-modified asphalt. This is the basic asphalt that is used for dampproofing with the addition of polymers that allow it to stretch and withstand hydrostatic pressure.

Emulsion Vs. Solvent-Base Materials

Foundation waterproofing and dampproofing comes in two varieties, emulsion (water-base) and solvent-base. Emulsion materials require little or no heating of the material to spray. Solvent-base materials usually must be heated to 130-150 degrees F in order to spray. It is therefore extremely important to choose the right spray equipment for the material you are using.

Foundation Waterproofing Sprayer

A basement waterproofing contractor needs a sprayer that will do the job reliably and quickly. The best method of spraying a solvent-based material is to have a heated tank system. The tank is filled with the waterproofing material. The tank will have a pipe inside it that is surrounded by waterproofing material. This pipe is connected to the truck engine cooling system. The heat from the truck heats the material in the tank.

A solvent-based material waterproofing sprayer will also have a heat exchanger. A heat exchanger rapidly heats the waterproofing material to the final spray temperature. It is also connected to the truck engine's cooling system.

Emulsion-based waterproofing spray equipment can be used with a tank, tote or simply suck straight out of a drum. This is because the emulsion-based waterproofing needs less heating to spray. A smaller heat exchanger than one used on a solvent-based waterproofing sprayer is all that is needed to get the material to the proper temperature.

It is recommended that emulsion waterproofing sprayers be an enclosed unit or one that is mounted inside a box van bodied truck. This is because the waterproofing material can freeze in cold temperatures and prevent the unit from working properly.

Additional Features

For ease of use a foundation waterproofing sprayer should have an electric hose reel. This will allow a contractor to quickly finish a job and continue to another. Also, the spray hose should be insulated and covered with an abrasion protection sleeve. This will both keep the waterproofing material at the proper spray temperature and protect the hose from damage.

Temperature gauges should be on both the tank and the spray hose so that the contractor knows the temperature of the waterproofing material. A pressure gauge is useful for both correct spraying and in diagnosing any problems that may occur with the pump.


Clcik here for Applied Technologies' sprayers.


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