Insulating A Low Slope Roof

Such roofs are generally considered to have a slope of less than 2 12.

Insulating a low slope roof.

The insulation used in low slope roof assemblies typically falls into one of the four categories. Insulfoam sp is an engineered insulation consisting of a superior closed cell lightweight and resilient expanded polystyrene eps with a durable and stable factory laminated coated glass facer. The analysis was done for an assembly consisting of a steel deck two layers of polyisocyanurate foam insulation polyiso and tpo single ply membrane. Lightweight insulating concrete lwic.

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. Insulfoam single ply sp fire rated single ply roof insulation with factory laminated glass facer. Ideal for low slope roofing. Common low slope roofing assembly.

Insulating a cool self drying vented low slope roof i own a mid century modern home in the seattle area with a 1 12 pitch roof over vaulted ceilings separated by 2x6 joists with r13 batt insulation venting at the soffit and ridge and a condensation issue that started after the modified bitumen roof was replaced last june with a white tpo. Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be. Some assemblies included a high density hd polyiso board at the deck level. Water is insulation s enemy.

Or sprayed polyurethane foam spf. By martin holladay issue 250 april may 2015. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. Rigid board insulation rigid board insulation is the most common type of insulation used in low slope commercial roofing.

Box out light fixtures. It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow. Insulating a low slope shed roof learn 5 reliable ways to build an energy efficient flat or shallow pitched unvented roof which is much easier and less risky than building a vented one. Eric dymond lives in a 1920s baltimore row house that needs a new roof.

It is made from.