How is Spray Foam Insulation Installed?

Spray foam insulation comes in a variety of forms, including cans, cylinders, and kits. It’s mostly intended for indoor use, although thicker forms can be used outdoors for some applications. While it’s best for Markham residents to let professionals install spray foam insulation, it’s still worthwhile to have an understanding of how it is done.

Spray polyurethane foam is known as the only complete insulant, as it can be used to cover complete walls or simply to seal gaps and cracks.

One-Component or Two-Component

One component foam products, also known as foam in a can, are readily available and intended for use in smaller projects. These products are easier to apply, as they are simply sprayed into gaps or crevices, and come in smaller volumes.

The two-component products come in mixing kits. These are intended for medium to large products and are NOT for DIYers. They are high pressure systems that are designed for professional use, as they require special training as well as the use of personal protective equipment. The two components include polyol resin and isocyanate. The mixture must be perfect with a 1:1 ratio in order for the polyurethane to spray on properly. Also, isocynates are potent respiratory and skin irritants, and must be handled professionally.

The Preparation Process

No matter what type of spray foam insulation is going to be used, it’s important for preparations to made. All debris, including oil, dust and nails, need to be removed before the application process. All objects around the application area need to be removed, as spray foam can be sticky. In large applications, furniture may even need to be covered and protected.

Protective Gear

Every spray foam insulation markham project requires some level of personal protection. Even for small scale spray foam can sealing requires, at the very least:

  • Eye protection
  • Chemical resistant gloves
  • Chemical resistant clothing
  • Mouth/nose covering to help prevent vapor inhalation

Larger projects may require the use of a supplied air respirator and purifier. All equipment must be intact upon use and all equipment properly maintained. Children, pets, and any adult who is not involved in the insulation should stay outside.

Other Considerations

There should be plenty of ventilation in areas where the spray foam is to be installed. This will help prevent inhalation of mist and vapors.

There should never be any spraying in high heated areas. If a can is used, the unreacted chemical constituents could potentially become combustible. High heated areas include places near fireplaces, radiators, recessed lighting, heaters, heat lamps, exposed copper wires, etc.

Sheathing may be required on some interior walls. Spray foam is typically applied against OSB sheathing or plywood. Thermo-play is a good option for soundproofing rooms.

The appropriate cell type (closed or open) must be used, and the right thickness must be applied. Open cell spray foam my requiring some trimming. Closed cell spray foam requires regular spot checking. For trimming, it’s a good idea to wait for the foam to become hardened or “cured”.

Some type of ignition-barrier paint might be required to spray over the foam if the manufacturer does not supply a letter stating that the foam meets co-desolate conditioned space.

Homeowners in Markham should let licensed professionals, such as those with the Home Insulation handle all of their spray foaming needs, no matter the size.