Insulation Overstock
Wholesale Fiberglass Insulation · insulationoverstock.com
Doc: IO-SPEC-WMP30-01
Rev: 2026-07
WMP-30 Heavy-Duty Polypropylene-Faced Fiberglass Insulation
PSK-HD classification. 30-perm vapor rating with the industry’s only 8-ft-wide roll option for large-span metal buildings.
Physical Specifications
| Facing Classification | PSK-HD (polypropylene / scrim / kraft, heavy-duty) |
| Facing Color | White |
| Substrate | NAIMA-certified fiberglass batt |
| Available Widths | 4 ft, 5 ft, 6 ft, 8 ft (industry-unique) |
| Available Lengths | 16 ft to 100 ft rolls |
| Compression Recovery | ≥90% after packaging release |
Performance Data
| R-Value Range | R-8 through R-25 |
| Vapor Permeability | 30 perms (ASTM E96) |
| Fire Rating | Class A / Class 1 (ASTM E84) |
| Tensile Strength | 50 lbs/in (MD/CMD) |
| Mullen Burst Strength | ≥60 psi |
| VOC Emissions | Compliant with CDPH 01350 |
R-Value / Thickness / Wholesale Rate
| R-Value | Nominal Thickness | Wholesale Rate ($/sq ft) | Recommended Use |
|---|---|---|---|
| R-8 | 2.5″ | $0.54 | Unconditioned storage with humidity concerns |
| R-10 | 3.0″ | $0.58 | Humid-climate light-duty walls |
| R-11 | 3.5″ | $0.61 | Humid-climate 2x4 wall (code minimum) |
| R-13 | 3.625″ | $0.71 | Standard 2x4 wall, humid climates |
| R-19 | 6.0″ | $0.96 | 2x6 wall, standard ceiling (humid) |
| R-25 | 8.0″ | $1.19 | Cold + humid climate wall and ceiling |
Standards Compliance
| Material Standard | ASTM C665 Type II Class C |
| Fire Testing | ASTM E84 (Class A) |
| Vapor Testing | ASTM E96 |
| Certification | NAIMA-certified U.S. mill |
| Return Policy | 30-day inspection window |
Recommended Applications
| Large-Span Metal Buildings | Best choice (8-ft-wide roll option) |
| Humid-Climate Metal Buildings | Roof + walls (30-perm rating) |
| Commercial | Warehouses, manufacturing, humid |
| Livestock/Agricultural | Excellent perm rating for moisture |
| Best For | Humid climates, wide-purlin buildings |
Ordering
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