Pipewrap
GLT Pipewrap combines a foil-faced 1 lb/ft² MLV barrier with a 1" quilted fiberglass absorber, so a single wrap adds decoupled mass AND absorption around noisy piping, HVAC ducts, valves, and fan housings. Class A fire-rated (ASTM E84 FS 12.5 / SD 19.5), serviceable from -20°F to 350°F, and sold by the square foot (minimum 5 sq ft) and supplied from 48"×30' rolls — 120 sq ft per full roll. Installs quickly with bands and Reinforced Foil Seam Tape.
- Engineered Acoustic Wrap: Combines Foil-Faced MLV laminated to 1" quilted insulation for significant airborne-noise reduction on pipes and ducts.
- Measured Performance: STC 29–30 rating adds substantial noise reduction to the overall decoupling assembly.
- Code-Ready Safety: Thermal R-value of 4, service range -20°F to 350°F, ASTM E84 Class A flame and smoke compliance.
- Fast Installation: 48"×30' rolls simply wrap to piping (foil out), leaving a 2" overlap, band, and foil-taped seam.
- Predictable Mass: 1.22 lb/ft² barrier delivers consistent sound blocking without added complexity of multi-layered assembly.
- Broad-Use Cases: Pipes, ducts, valves, fan housings, and mechanical enclosures across residential, multi-family, and commercial spaces.
Online orders up to 500 sq ft. For anything larger, call (415) 864-4440 and we'll price the project with you.
Freight shipments include a $100 freight-and-handling charge.
Pipewrap Specifications
- Composition
- 1 lb/ft² Foil-Faced MLV bonded to 1" quilted fiberglass noise barrier
- Nominal Thickness
- 1"
- Sold By
- Square foot — $36.80 per sq. ft., 5 sq. ft. minimum
- Standard Roll Size
- 48" W × 30' L (120 sq ft per full roll)
- Areal Weight
- 1.22 lb/ft²
- Temperature Range
- -20°F to 350°F
- R-Value
- 4.0 (approximate)
- Fire Rating
- ASTM E84 Class A — Flame Spread 12.5, Smoke Developed 19.5
- STC (barrier only)
- 29 (1"), 30 (2")
- Use
- Wrap noisy pipes, ducts, valves, fan housings, and mechanical enclosures
- Install Accessory
- Reinforced Foil Seam Tape (3" × 150')
Reinforced Foil Seam Tape
- Facing
- Aluminum foil, scrim-reinforced
- Adhesive
- Pressure-sensitive acrylic
- Width
- 3"
- Roll Length
- 150 ft
- Thickness
- 6 mm
- Coverage
- ≈ 300 sqft of seam per roll
- Use with
- Seal every Pipewrap overlap, butt seam, and cut
How much Pipewrap do you need
Sold by the square foot at $36.80 per sq. ft. Minimum order 5 sq. ft. — 120 sq. ft. per full roll (4 ft × 30 ft).
Planning a large or complex project? Call us at (415) 864-4440 for help confirming material quantities and ordering options.
Estimated STC Gauge
Compare how the Pipewrap performs across assembly tiers. Select an assembly below to see the estimated STC score.
Standard fiberglass pipe insulation with no barrier layer.
Estimated STC — Planning use only
This value is an approximate assembly projection, not a project-specific assessment, certified laboratory test result or performance guarantee. Actual performance varies with the complete assembly, installation, flanking paths, penetrations and site conditions.
- STC 30-39: Loud speech clearly audible next room.
- STC 40-49: Loud speech muffled — normal residential wall.
- STC 50-59: Loud speech barely audible; suitable for offices & multi-family.
- STC 60+: Approaches studio-grade isolation.
How Pipewrap compares
| Model | Primary Use | Acoustic Role | Strength | Notes |
|---|---|---|---|---|
| Pipewrapthis | Wrapping pipes, ducts, and mechanical enclosures | Adds decoupled mass + absorption | 1.22 lb/ft² + fiberglass core | Class A, -20°F to 350°F service |
| Pipe Insulation Only | Thermal control on piping | Minimal barrier effect | Low mass | No STC rating on its own |
| MLV Wrap (barrier only) | DIY pipe wrap without absorber | Barrier only | 1 lb/ft² | Requires separate insulation layer |
Applicable Assemblies
See where the Pipewrap fits — from budget baseline to studio-grade isolation.
Best — Pipe + 2" Pipewrap + Foil Seam Tape
Two wraps of Pipewrap around loud DWV or supply line, seams sealed with Reinforced Foil Seam Tape.
Better — Pipe + 1" Pipewrap + Foil Seam Tape
Single wrap on standard risers and branches, foil-taped at overlaps and terminations.
Good — Pipe + Pipe Insulation Only
Baseline non-acoustic insulation without a barrier layer.
