Radiant Barrier RB+
Features
- Industrial-strength build: Perforated radiant barrier with a heavy-duty woven core.
- Low-emittance surface: ASTM C1371 tested - 5% emittance (≈ 95% reflectivity).
- Safe and convenient: Non-toxic, non-carcinogenic, fiber-free, and maintenance-free; no special clothing or respirators required for installation.
- Easy to install (DIY-friendly): Can be stapled to the underside of attic rafters and applied to vertical attic walls, including gable walls.
- Corrosion-resistant durability: Designed to conform to ASTM 1313 surface-corrosion standards, maintaining low emittance and high radiant-heat reflectance over time.
- Energy-savings potential: Especially effective in attics. Studies indicate up to 77% savings are possible; actual results depend on installation quality, climate zone, and other factors.
- Lower carbon footprint: Reduces energy use and associated emissions, helping cut utility bills while supporting broader climate goals.
- Year-round comfort & value: The RB+ Insulation Roll combines durability and safety with potential energy savings for a more comfortable, cost-effective home.
Cold Weather Features
- Attic rain reduction: Attic rain happens when warm, moist indoor air condenses and freezes as frost on cold roof decking, then melts and drips into the attic. RB+ helps reduce frost buildup and melt-off by keeping roof-deck temperatures closer to outdoor conditions and reducing temperature swings that drive condensation.
- Cold-surface condensation control: Helps reduce condensation forming on the underside of roof decking and framing members during winter conditions.
- Dew-point risk reduction: Keeps attic air and surface temperatures slightly warmer and reduces the temperature difference between attic air and roof sheathing, lowering the chance moisture reaches the dew point on cold surfaces.
- Reduces radiant heat loss: In winter, RB+ reflects radiant heat emitted from the conditioned space back toward the attic floor insulation.
- Improves existing insulation efficiency: Minimizes radiant exchange between warm interior surfaces and cold roof decking, helping reduce downward heat loss across the attic assembly.
- Helps limit moisture-related damage: Less winter condensation can help reduce mold growth, wood rot, damp insulation, musty attic odors, and long-term structural damage risk.
- Stabilizes attic environment: Supports more consistent attic temperatures, helping reduce thermal cycling that can contribute to seasonal moisture issues.
- Moisture-safe and ventilation-friendly: Non-absorptive and air-permeable when installed correctly under rafters, so it won’t trap humidity and attic ventilation can continue to function as designed (also retrofit-friendly without disturbing attic floor insulation).
Variants
| Name | SKU | Roll Size | Width | Length | Weight |
|---|---|---|---|---|---|
| 500 ft² Foil/Foil | RB-MPET-PEF-500 | 500 sq ft | 48" | 150' | 14.5 lbs |
| 542 ft² Woven | RB-MPET-FF-26 | 542 sq ft | 26" | 250' | 15 lbs |
| 1000 ft² Woven | RB-MPET-FF | 1000 sq ft | 48" | 250' | 29 lbs |
Specifications
| Specification | Value |
|---|---|
| Standard Roll Sizes | 48" x 250" / 26" x 250" / 48" x 150' |
| Roll Weights | 29 lbs (1000 sq ft) / 15 lbs (542 sq ft) / 14.5 lbs (500 sq ft) |
| Emittance (Metalized Foil Side) | 5% |
| Reflectivity | 95% |
| Resistance to Fungi ASTM E1338-08 | PASS – No Growth |
| Permeability ASTM E96-05 | 6.29 Perms |
| Flame Spread, Smoke Development, and Fire Rating | Class A / Class 1 |
Thermal Performance
| Assembly | Heat-Flow Direction | Typical R-Value Range |
|---|---|---|
| Attic/Roof | Heat flow down | R-4.1 to 14.5 |
| Wall | Heat flow horizontal | R-5.54 to 10.85 |
- R-values represent estimated and potential heat resistance for our insulation in the proposed application.
- Actual performance depends on air film size, temperature, surface condition, and airflow direction (up, down, or horizontal).
- Calculations are based on RIMA, AIRAH, ASHRAE, and ISO 6946 standards, following ASTM procedures for air film resistance.
- When two air spaces are used, values assume still air conditions in both spaces.
- For a full R-value assessment, please contact us directly or your nearest dealer.
