I ve been told by every insulation contractor that i would have to do a hot roof 2lb sprayfoam application.
Hot roof foam and bat insulation.
I m in toronto and i ve built a house with a roof pitch of 3 12.
Two common types of insulation are spray foam insulation and batt insulation.
Standard fiberglass batts have r values ranging from r 2 9 to r 3 8 for every inch of thickness but high density insulation batts can have r values as high as r 4 3 per inch.
Polyurethane spray foam metal roof insulation.
It can provide homeowners with an airtight and gap free barrier one that not only resists moisture but also adheres to all types of surfaces.
The spray can be basically applied on top or bottom of the metal roofing surfaces.
You can use the small pressurized cans of foam in place insulation to reduce air leakage in holes and cracks such as window and door frames and electrical and plumbing penetrations.
Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation.
When your attic is filled with spray foam insulation to create a hot roof your attic s temperature rises because the thermal envelope is shifted to the underside of your roof because ventilation is not present.
Install the batt so that the facing is the exposed side.
The standard framing includes 2ã 6 vertical studs spaced 16 inches on center drywall interior finish osb or plywood exterior sheathing tyvek or a.
Basically the term cold roof refers to a traditional roof or vented roof while hot roof refers to a roof that is not ventilated and which has foam insulation attached directly to the roof sheathing.
Foam in place insulation can be blown into walls on attic surfaces or under floors to insulate and reduce air leakage.
If i tried to put in loosefill or batts i m told there will be no room for air circulation and i ll get mold.
It offers an air tight barrier.
Financially speaking this spray is a great option especially when you need to renovate your roof after the application.
If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies.
Unvented roofs which provides a detailed explanation of each.
In this case you can learn a lot from foam tech s article vented vs.
It can provide homeowners with an airtight and gap free barrier one that not only resists moisture but also adheres to all types of surfaces.
Spray foam insulation spray foam insulation is a highly efficient insulation product commonly used in residential commercial and industrial applications.
Greenguard in winnipeg shares some information on these two options and why spray foam is the superior choice.
Flash and batt insulation is a method of insulating standard stud walls by augmenting fiberglass batts with 2 inches of closed cell spray foam applied to the interior of the building sheathing.
Reason for this is that the city of toronto requires r60 in the roof attic.
Compared to the fiberglass batts this insulation is much better.
Facing helps prevent interior heat from escaping and water vapor from passing through the insulation.
Some installations can yield a higher r value than traditional batt insulation for the same thickness and can fill even the smallest cavities creating an effective air barrier.
