Martin holiday i am an architect in toronto.
Closed cell polyurethane foam spray.
Closed cell spray foam for a residential roof addition mr.
Spray on insulating foam is a polyurethane material that is used as a thermal barrier in buildings appliances etc it comes in two primary forms.
Basf manufactures both closed cell and open cell spray polyurethane foam products for residential and commercial construction providing the right spf system for any type of.
The medium density foam provides sheer and racking strength to wall assemblies in building applications.
Because of existing conditions and the shape of the new roof.
Closed cell is a two component medium density one to one by volume spray applied polyurethane foam.
Johns manville corbond iii closed cell spray polyurethane foam insulation offers and r value of r 7 per inch and can be applied in a single pass to a maximum of 3 5 inches providing superior thermal performance with seamless air sealing and moisture control in a single step.
With high yield and excellent adhesion it s an.
Because spray polyurethane foam is fully adhering and seals hard to reach penetrations it provides unequaled air sealing properties for the entire building envelope.
To produce closed cell requires the use of an a component iso and a blended b component resin which contains zero ozone depleting blowing agents catalysts polyols and fire retarding materials.
Open cell and closed cell each having benefits and disadvantages.
I am designing a new roof addition to a row house building.
Both types are applied in a similar fashion from two tanks and expand upon exiting the mixing applicator nozzle.
Multiple immediate passes with no wait time may also be applied.
They can be used alone or in tandem depending on the requirements of.