Insulation & Ventilation Terms
A Quick Overview On The Common Terms You'll Here In This Industry
Humidity, Relative
The amount of water vapor that is actually in the air compared to the amount of water vapor that could exist in the air at a given air temperature, expressed as a percentage. More moisture can exit in warm air than cold air, so raising air temperature while keeping the water vapor constant reduces relative humidity.
Vapor Drive?
A condition that occurs when heat vapor pressure cause increase vapor diffusion. One example is when water vapor diffuses through permeable building material from heated interior ares in the winter. Another example is when solar radiation heat wet bricks forcing water vapor though permeable building materials in the summer.
Dew Point (Temperature)
Basements start underground and no matter what materials were used to make the foundation, the pressure from the ground forces moisture through the building materials.
Making things worse is when the basement ends above ground, the temperature near the ceiling will change according to the outside temperature. This temperature difference means that if there is any airflow against he foundation wall, thee will be moisture condensation.
Making things worse is when the basement ends above ground, the temperature near the ceiling will change according to the outside temperature. This temperature difference means that if there is any airflow against he foundation wall, thee will be moisture condensation.
Permeability
The ability or proper of material to resist or allow the diffusion of water vapr through said material. Permeability is expresed as a number greater than zero.
R-Value
The ability or property of a material to slow heat transfer. A high R-value number equals a higher ability to slow heat transfer. R-value is expressed as a number greater than zero and is used to compare the insulation value of materials.
U-Value (Factor)
The ability or property of a material to allow heat transfer. it is the inverse of R-value and is expressed as a number greater than zero. The larger the number, the higher the rate of heat transfer and a lower R-value.
Fenestration
Openings in the wall and roof of a house such as windows, doors and sky-lights.
Vapor Barrier
A technically questionable term often used when the term vapor retarder is intended.
Vapor Diffusion
The ability or property of a material to slow heat transfer. A high R-value number equals a higher ability to slow heat transfer. R-value is expressed as a number greater than zero and is used to compare the insulation value of materials.
Vapor Retardere
Material that restricts the air flow of a water vapor.
Ventalation (Bilding)
The process of supplying outside air to a house or removing inside air from a house by natural or mechanical means. It can be random and uncontrolled (air leaks) or designed and controlled (outside air ducts)
Green Attic Insulation Customer Reviews
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8 days ago
Romuno and his team came on time and were very cordial and friendly. They discovered
an issue with some electrical work while working on the insulation, which I was surprised and happy about, and were able to rectify the situation easily and at a great value, considering the timing of the project, etc. Romuno made it clear he want to ensure my satisfaction throughout the process. When finished, the job site was cleaned very well.
I highly recommend this company and all its team members and hope to do more projects in the future with them!
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8 days ago
Romulo and his teammate were so fast and clean at insulating and repairing our damaged
ceiling due to a roof leak. Again it was easy to engage green Attic as a return customer because I felt well treated with their work when they first insulated and managed.to transform our cold home. Great job!
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22 days ago
Fantastic work. No nonsense, clean job site, speedy and good communication.
an issue with some electrical work while working on the insulation, which I was surprised and happy about, and were able to rectify the situation easily and at a great value, considering the timing of the project, etc. Romuno made it clear he want to ensure my satisfaction throughout the process. When finished, the job site was cleaned very well.
I highly recommend this company and all its team members and hope to do more projects in the future with them!
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1 month ago
Had our attic insulation beefed up with new blown in cellulose. Was a major improvement
immediatly after it was installed. Cut our heating needs by 3x to maintain temperature in the house.Team working on my house was friendly and professional. Team leads Romulo and Omar did a great job making sure everything was done right and everything was cleaned up after.
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2 months ago
Romulo & Alvaro did a great job installing everything. Cindy, Frank and the Green Attic team
were extremely attentive. I love how easy they made the process, everything is online even the rebates.
BONUS: I originally reached out to them to check for mold free of charge.
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2 months ago
These guys did a great job! Great price, quality service, and they offer several payment
options and plans. I thought we bought a lemon of a house and the insulation and sealing job they did fixed all of our issues and were so thrilled! Highly recommend these guys. Plus they are local so it’s great supporting a chicago based company.
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3 months ago
Highly recommend Green Attic. Scheduled to have my attic re-insulated and Romulo
and his crew did a fabulous job. The attic was in pretty bad shape prior to the work getting done and green attic made it look so good. The crew worked efficiently and got the job done in 2 days. I also asked Romulo to install a couple other things on my roof outside of the scheduled project and he very kindly and willingly did so without hesitation. Very pleased with how everything turned out. Thank you so much for a job well done! Before and after pics below.
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