Durable and moisture resistant, Styrofoam™ Brand Ultra SL Extruded Polystyrene Foam Insulation provides continuous insulation as part of a complete 4-in-1 wall system.
Styrofoam™ Brand Ultra SL Extruded Polystyrene Foam Insulation is a moisture-resistant, durable and lightweight extruded polystyrene foam board with shiplap edges designed specifically to be used as a continuous insulation (ci) and installed over block, concrete or metal stud backup behind masonry or stone veneers. Manufactured with a patented carbon-black technology, Styrofoam™ Brand Ultra SL Insulation features an R-value of 5.6 per inch (RSI of 0.97 per 25 mm), the highest of all extruded polystyrene foam insulation products. With its closed-cell structure offering advanced long-term thermal performance and moisture control, Styrofoam™ Brand Ultra SL Insulation with shiplap edges maximizes the performance of the entire wall assembly.
|Lockable edges speed installation||
|Thermal Resistance per inch @ 75°F mean temp. 1.75” 2.125” 2.5” 3.0”1||ASTM C518||ft2 •h•°F/Btu, R-value, min.||10.0|
|Compressive Strength2||ASTM D1621||psi, min.||25|
|Water Absorption||ASTM C272||% by volume, max.||0.3|
|Water Vapor Permeance 1.75” 2.125” 2.5” 3.0”3||ASTM E96||perm, max||1.1|
|Maximum Use Temperature||-||°F||165|
|Coefficient of Linear Thermal Expansion||ASTM D696||in/in•°F||3.5 x 10-5|
|Flexural Strength||ASTM C203||psi, min.||50|
|Flame Spread||ASTM E84||-||50|
|Smoke Developed||ASTM E843||-||155|
1 Values are consistent with the criteria of ASTM C578 and the FTC R-value rule (16 CFR Part 460).
2 Vertical compressive strength is measured at 10 percent deformation or yield, whichever occurs first. Since Styrofoam™ Brand Extruded Polystyrene Foam Insulations are visco-elastic materials, adequate design safety factors should be used to prevent long-term creep and fatigue deformation. For static loads, 3:1 is suggested. For dynamic loads, 5:1 is suggested. Contact DuPont for design recommendations.
3 These numerical flame-spread and smoke-developed ratings are not intended to reflect hazards presented by this or any other material under actual fire conditions.
|Thickness1 (in)||R-Value2||Board Size3 (ft)||Edge Treatment|
|Styrofoam™ Brand Ultra SL||1.75||10.0||4 x 8||8’ Shiplap|
|2.125||12.0||4 x 8||8’ Shiplap|
|2.5||14.0||4 x 8||8’ Shiplap|
|3.0||16.8||4 x 8||8’ Shiplap|
1Not all product sizes are available in all regions. Additional product sizes are available by custom order. Consult your DuPont sales representative about other sizes and lead-time requirements.
2R means resistance to heat flow. The higher the R-value, the greater the insulating power. R-values are expressed in ft2 x h x°F/Btu. R-value determined by ASTM C518.
34’ x 10’, 4’ x 12’ lengths available through special order.