Rigid Insulation Over Roof Deck

Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and.

Rigid insulation over roof deck.

Rigid insulation under a cool roof in zone 3. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. It is an acceptable practice to install a new roof over an existing roof membrane system provided that the roof deck is. Appreciate this extremely helpful blog.

Materials appropriate for insulating sheathing with unvented cladding substrate include. 6 of rigid iso with or without pre applied nailbase above the roof deck feels like the right solution to this humble pilgrim. The energy argument is argumentative. Rigid board insulation is the most common type of insulation used in low slope commercial roofing.

The rigid insulation over roof would have controlled the temperature of the condensing surface the underside of the roof deck so that i would not have had to use the spray foam except at the perimeter to provide the air seal to the tops of the walls. The insulation installed over the roof deck must be installed in multiple layers with joints offset in order to control convective looping at joints between insulation panels. Polyisocyanurate extruded polystyrene xps. Currently there is no insulation anywhere and the third floor basically an enclosed attic gets crushed by heat in the summer.

The rustic bare wood ceiling look is preserved all of the structural wood stays inside the thermal pressure boundary of the building all cozy dry. I live in charleston sc in an old 1858 3 story wooden house. The roof deck can be plywood metal concrete or wood planks. How to install insulation board over an existing roof membrane.

The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. Rigid board insulation is typically applied to the top surface of the deck except in the case of a protected membrane roof pmr in which case it is applied over the. Densdeck roof boards are fm tested and approved as the only 1 2 gypsum product to meet the. It is made from cellular plastic or fibrous materials and pressed into boards.

Plan to replace asphalt shingle roof with standing seam metal.