Dehumidifier In Attic Spray Foam

As i noted in a different article air leakage through spray polyurethane foam open cell spray foam only needs to be 3 or 3 5 inches thick to form a decent air barrier.

Dehumidifier in attic spray foam.

Open cell spray foam insulation doesn t store the moisture. Ventilation in spray foam houses. In spray foam homes spray foam insulation has been increasing in popularity over the last several years due to. 3 reasons to remove attic floor insulation in a spray foam attic.

When we seal the attic with spray foam it s as tight as a butter tub. I have a whole house dehumidifier down in the basement that keeps the humidity below 59 and average is 55. Many homeowners love spray foam insulation and it s easy to understand why. The dehumidifier we recommend for attics are the homelabs dehumidifiers.

The role of open cell spray foam. One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic. New york the past few days and most of the house stays at around 60 to 65 relative humidity. The main reasons we chose this specific model is that it includes continuous draining which means you won t have to keep going up to the attic to empty the tank as long as you have somewhere to drain the water and it also has a 2 year warranty which is longer than most.

Whole house ventilating dehumidifier. It s the wood decking that stores the moisture though. In these humid attics the moisture is getting through the open cell spray foam by vapor diffusion not via air leakage. Jason advani has insulated his attic with spray polyurethane foam and while his heating bills have dropped high humidity remains a problem.

To reduce energy costs homes are being built tighter and insulated better than ever. Becoming more affordable significant long term energy savings sealing restricts air movement through. In a vented attic all of that expensive airflow is lost to the environment. Attics with spray foam insulation are so cool.

We mean that literally by the way. Advani says he runs a dehumidifier in the basement during the summer and a whole house humidifier in the winter. It has a relatively high vapor permeance 3 perms at a thickness of 6 allowing water vapor to migrate to the roof decking at night and back into the attic air in the daytime. It s just a pathway.

Oh and when you put it in your attic spray foam. When you insulate the top of your attic with spray foam you re bringing your attic into your home s envelope as a result you can reduce the temperature in your attic by a lot anywhere from 120 degrees to around 95 during peak summer. While this makes sense from an energy perspective it also makes providing a healthy and comfortable indoor environment more of a challenge.