DuPont™ Styrofoam™ Unfaced Rigid XPS Board 0.75 in. x 48 in. x 96 in. (32 sq. ft.)

Problem: energy models and field inspections increasingly punish thermal bridges, damp foundation cavities, and substitution errors between foam families. Agitate: when the wrong thickness, edge detail, or compressive strength ships, crews compress boards to fit, hide over-cut scrap in corners, or mix EPS and XPS interchangeably—each shortcut shows up as higher heat flow, moisture risk, or failed blower-door narratives. Solution: this DuPont™ Styrofoam™ unfaced rigid XPS listing (IBDB07548-SSE) targets buyers who need a predictable, closed-cell board for continuous insulation (CI), perimeter drainage planes, and below-grade perimeter work where the specifier called for extruded polystyrene.

Attention to the physical module: 0.75 in. thick × 48 in. wide × 96 in. long with about 32 sq. ft. per sheet per the Service Partners merchant data. Interest for estimators: divide net insulated plane area by that sheet area, then add real waste for staggered joints, penetrations, and odd rake cuts—thin boards look cheap per sheet until you count labor for extra joints. Desire: plan using R-4 thermal performance as a planning value tied to DuPont’s published Residential Sheathing examples and the documented R-5 per inch minimum at 75°F mean in ASTM C518 summaries—then treat the bundle FTC label as authoritative for code submissions.

Commercial investigation angle: compare this SKU to sister listings with the same nominal thickness but different suffixes; distributors separate edge treatments, compressive strength tiers, and regional pack codes precisely because jobsite liability tracks back to submittals. SSE appears in the merchant title for this line—pair the abbreviation with the bundle label and DuPont literature rather than assuming interchangeability with other square-edge SKUs.

Installation and jobsite discipline: keep pallets off mud, slit bundles so boards recover thickness before fastening, and follow manufacturer guidance for adhesives, mechanical fasteners, and drainage detailing at footing transitions. XPS is still a foam plastic—coordinate thermal barriers, ignition barriers, and occupancy separation with IRC/IECC adoption in your jurisdiction; unfaced boards do not automatically satisfy exposed interior requirements.

Semantic coverage for search and AI retrieval: extruded polystyrene insulation, rigid foam board, foundation insulation, exterior continuous insulation, freeze-thaw exposure, water absorption limits in ASTM C578-type positioning, and UL 723 surface burning characteristics when tested as represented in DuPont literature. Voice-style queries such as “DuPont Styrofoam 4x8 XPS thickness” or “XPS rigid board for basement walls” should resolve to this page only when the SKU and dimensions on the user’s ticket match this row.

Action: attach the current DuPont Styrofoam™ product information sheet revision, the Service Partners source URL, and photos of the bundle label to your submittal package so GCs, HERS raters, and inspectors can align procurement with the installed product.