Spray Foam Attic Ceiling

You should never do this.

Spray foam attic ceiling.

When we seal the attic with spray foam it s as tight as a butter tub. Use closed cell foam it green for attic rafters. 100 free of cfcs vocs penta bdes urea formaldehyde. Class i e 84 fire retardant meets building code spec.

Installing insulation attics one of the high tech insulation products being utilized these days is a foam spray product called icynene which is a foam that starts as two liquid components a and b if you will that are heated up and sent through two hoses and meet at a tip of a gun where the magic begins. Touch n foam 2 component spray foam expands and touch n foam 2 component spray foam expands and cures quickly to fill cavities gaps cracks expansion joints and other sources of air leakage in a building envelope. 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. This construction approach was first used in the 1970s and it has been implemented much more widely since it was first included in the international code council s icc model building code in 2007 irc section 806 4.

However in a traditionally insulated attic insulation on the ceiling the attic is vented. It will also help keep any duct leaks within the conditioned space of your attic. But a common reason to put spray foam on the roofline is to avoid having to air seal the attic floor. The installer sprayed foam directly on the metal flues.

Thus the air in the attic is connected with the air in the house. We are considering applying 2 of medium density polyurethane spray foam to the attic floor topped with blown in cellulose. The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly.

Using icynene spray foam as your attic insulation will turn your attic into a conditioned space. This will allow for optimal operation of your hvac equipment as well as aid in early detection of situations such as roof leaks and wind driven moisture intrusion. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls. Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials.

If you leave the insulation in the attic floor after insulating the roofline the attic will be cooler in winter than if you remove the insulation. You ll also see another safety hazard and code violation. Currently there is no vapour barrier on the attic floor and it would be challenging to add one over the ceiling joists. Resists moisture that can lead to mold or mildew and provides increased sound and thermal insulation.

Get your kits the easy to use spray foam kit. If you look closely you ll see two exhaust flues on the left side.