Minimum Required Psi Foam Board For Roof

Attach to deck board.

Minimum required psi foam board for roof. Minimum slope of per foot as required by the international building code ibc toward roof. Grading the isocyanurate by compressive strength grade 1 compressive strength is minimum 16 psi grade 2 is minimum 20 psi and grade 3 is minimum 25 psi. Astm c1289 type ii class 2 grade 2 20 psi or grade 3 25 psi can ulc s704 type 2 class 3 or type 3 class 3. Greenguard type vi 40 psi insulation board is designed for use in high load applications requiring compressive strength up to 40 psi.

K 360 psi 2 inches 180 pci. With an r value of 5 0 per inch of thickness the board increases the energy efficiency of your structures. Meets the requirements of astm c 1325. P 8000 pounds h 6 inches f c 2 500 psi e 57 000 2 500 2 850 000 psi u 0 15 k 360 psi for 1 inch eps.

Exceptionally high compressive strength improves overall roof system performance cement board is able to withstand prolonged exposure to moisture and is ideal for systems where wind uplift and puncture resistance are a concern. The existing standard of 4 percent which would allow a 96 inch board to expand contract 3 13 16inches. Eps foam insulation may experience dimensional and property changes when it is exposed to temperatures greater than 167 f. These values are in reference to mechanically attached insulation cover boards under.

The minimum insulation requirements for ceilings walls floors and foundations in new homes as listed in the 2009 2012 2015 and 2018 iecc and irc can be found in this table additional code requirements are listed on the compliance tab of this guide. Composed of a lightweight cementicious core to provide exceptional impact resistance. Maximum dimensional stability limit of 2 percent vs. Rigid foam is produced in various size panels 4 ft x 8 ft 4ft x 4ft etc.

In roofing type i eps material provides the dimensional stability and compressive strength necessary to withstand light roof traffic and equipment weight at reasonably high surface temperatures. Insulation requirements by climate zone. Rigid foam boards and are made. The minimum fastener pullout resistances for specific system the information listed in the chart below is for use with the referenced roof deck fastener type minimum pullout values and required penetration depths based on fasteners type.

In fact the 20 2 psi value is beyond the elastic range of the eps material and long term creep effects must be taken into account when using that design approach. After the roof deck is prepared the rigid foam boards need to be cut to size to fit snugly together on your roof. Plus it s light weight easy to handle and easy to cut with a knife. Meet can ulc s126 can ulc s101 and can ulc s107.