Preparing Attic For Spray Foam Insulation

Consumers are often told by spray foam contractors to do the rafters.

Preparing attic for spray foam insulation.

The prep work for adding insulation to your attic includes air sealing installing attic ventilation isolating heat sources bringing electrical up to code stocking up on supplies preparing the workspace getting all dressed up. Nothing unusual about that. Spray foam insulation is a great product. It s also how we ensure we leave the site better than when we started a job.

If you re using the attic for living space then you need to insulate the rafters. I can also tell you that 73 of all statistics are made up on the spot so please don t ask for. If you re not do the attic floor. This application effectively seals off the attic from the outdoors and eliminates air leakage and infiltration through the attic and roof areas.

And you avoid wood rot and mold. When you contract with kc spray foam for your spray on insulation needs this step is included in our price quote. 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. Earlier this year i got a question about a home that had spray foam insulation in the attic.

Install ventilation baffles essentially plastic or foam vents into the eaves by pulling the existing insulation away from the roof positioning the new vent chute so the bottom extends six inches into the overhang and stapling it into place. If you want you can even transform a spray foamed attic into a finished space. The last thing you want to do is add insulation to your attic without air sealing first. We come in and cover all windows doors.

A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents. Only spray polyurethane foam can be used for this application as batt insulation will end up sagging and blown insulation simply can t adhere to the roof decking. This alternative to traditional building insulation fiberglass can be applied into wall cavities holes concrete slabs and even onto roof tiles and. When we seal the attic with spray foam it s as tight as a butter tub.

It s how we protect the job site from overspray. When you insulate the top of your attic with spray foam you re bringing your attic into your home s envelope. The eaves don t get blocked. However in a traditionally insulated attic insulation on the ceiling the attic is vented.

I ve been in plenty of these homes and can tell you that when spray foam is installed properly they outperform 99 of fiberglass batt insulated stick built homes. The prep work ahead of a sprayed insulation job is an important step. As a result you can reduce the temperature in your attic by a lot anywhere from 120 degrees to around 95 during peak summer. Spray polyurethane foam is a chemical product that is created by two materials isocyanate and polyol resin that will react with each other when they are mixed and will expand up to 30 to 60 times its liquid volume as it is sprayed in place.