Roof And Deck Insulation

Shown to withstand delamination deterioration warping and jobsite damage more effectively than other roofing membrane substrates such as paper faced gypsum board fiber board and perlite insulation.

Roof and deck insulation.

Insulation with a thermal resistance of at least 0 85hr ft2 degree f btu or at least 3 4 inch air space is added to the roof deck over an attic or 7. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants. Minimum insulation r value requirements non residential above roof deck. Benefits of densdeck roof board include.

No insulation is installed on the ceiling or attic floor. Typically this would be achieved by adding polyiso insulation above the plywood deck. In climate zones 10 12 and 13 with 1 sq. Free ventilation area of attic ventilation for every 150 sq.

Where the metal roof panel functions as the roof deck and roof covering and it provides both weather protection and support for loads the structural metal panel roof system shall comply with this section. The right thickness would need to be calculated to move the dew point above the plywood deck where air infiltration is minimized. Structural standing seam metal panel roof systems shall be tested in accordance with astm e1592 or fm 4474. R 19 insulation is typically installed in the vented attic application underneath the roof deck.

Minimum insulation r value requirements non residential above roof deck is an extremely handy table for state and local jurisdictions in the united states. State applicable energy ashrae zone minimum r value state local ms mississippi ashrae 90 1 2010 2 r 20 3 r 20 state local mo missouri 2012 iecc 4 r 25 5 r 25 state only mt montana 2012 iecc 6 r 30. The roof deck can be plywood metal concrete or wood planks. Structural through fastened metal panel roof systems shall be tested in accordance.

The document was updated in 2020 and is available on the carlisle syntec website. Add insulation above the roof deck this approach fits current building science thinking in terms of putting the thermal control layer on the outside of the building structure. Rigid foam insulation installation prepare roof deck. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.

Unvented attics have r 38 integrated roof deck ird insulation installed underneath the roof deck. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. An insulation baffle is often used to ensure this air space is created. For cathedral ceiling applications make sure there is a minimum of a one inch 1 air space between the insulation and the roof deck.