Quality in Building Envelopes

In order to achieve a stable indoor air quality environment, you must first address air leakage in your home. This is done by determining what areas are of the most concern and applying a logical solution. The solution to solve multiple problems at once is Pentoir Spray Foam.

Insulation is made to address R-value, but it should also factor in air movement as well. Insulations such as standard fiberglass and tri-polymer foam are not effective in stopping the movement of air through the framing members of buildings.

Moisture permeability is also a key consideration for insulation materials in a building envelope. How does the material react to water intrusion, moisture laden air and changes in temperature? Does the material allow moist air to collect in the wall or ceiling assembly? Does moist air have a tendency to turn to water and create mold or other problems?

Energy-efficient buildings are achieved through a combination of excellent air sealing and good R-value. Cellulose and acrylic-based fiberglass can be effective in tandem with an excellent caulking package. Polyurethane spray foam can address both issues with one product, however. There are different types of polyurethane spray foam for different applications.

Although we also caulk our open-cell spray foam building frames for truly superior performance, foam insulation has some significant advantages in many buildings. Because it is adhesive, it sticks to and encapsulates framing members. We can spray onto open rafters and other areas whereas other types of insulation would succumb to gravity over time.

By bringing attic areas into the conditioned envelope with open-cell spray foam, a builder can also install ducts into this space for easier HVAC retrofits. Open-cell spray foam also is flexible and forgiving with water intrusion. Due to its cellular structure, it allows liquid water to permeate it without absorption, while inhibiting the movement of water vapor.

“Decoupling” the building framing members can also yield good results. Framing members can act as thermal bridges, siphoning energy from a building. With infra-red imaging, we can detect each and every framing member that connects the inside to the outside due to on-going energy loss. A builder can greatly reduce heat transfer by installing an air space and/or an insulation product over framing members.

Conductive heat flow is interrupted with these techniques.
Insulation materials can also be sound attenuators, particularly in tandem with decoupling the framing. Noise between rooms and from outside can be mitigated with insulation. Sanitary lines between floors are another area where sound attenuation can improve the quality of life.  Spray foam insulation is one of the most effective methods to deaden sound transmission.