HVAC ductwork can lose or gain significant amounts of heat when it is inadequately insulated.
For commercial buildings, hospitals, industrial facilities and large HVAC installations, XLPE duct wrapping sheet provides a lightweight closed-cell insulation option designed to reduce thermal transfer and help control condensation.
Scudoflex XLPE is manufactured from cross-linked closed-cell polyolefin foam with a factory-bonded aluminium-foil layer.
What is XLPE duct insulation?
XLPE stands for cross-linked polyethylene.
The cross-linked closed-cell structure provides a non-porous insulation material with low thermal conductivity and moisture resistance.
The factory-bonded aluminium foil on Scudoflex XLPE provides an additional facing layer for durability and finishing.
Applications
XLPE sheet insulation can be used for:
- HVAC ductwork
- Air-conditioning systems
- Chilled-water services
- Refrigeration
- Hot-water systems
- Mechanical services
- OEM assemblies
- Equipment insulation
Scudoflex specifically lists duct insulation among the typical XLPE applications.
Technical performance
Published Scudoflex XLPE data includes:
| Parameter | Value |
|---|---|
| Thermal conductivity @ 23°C | 0.035 W/mK |
| Operating range | −80°C to +105°C |
| Diffusion resistance | μ >54,700 |
| ASTM E84 | FSI <25 / SDI <50 |
| BS 476 | Class 0 |
| UL 94 | HF-1 |
| Water absorption | 0.05 kg/m² |
| ODP | 0 |
The manufacturer advises confirming project requirements against the current technical literature.
XLPE sheets and rolls
Scudoflex XLPE rolls are supplied in 1.2 m × 20 m formats from 3 mm to 20 mm, while sheets are supplied in 1.2 m × 2.4 m formats from 25 mm to 50 mm.
This range allows contractors to select a format according to duct dimensions, required thickness and installation method.
Why the foil facing matters
A factory-bonded aluminium foil layer can provide:
- A cleaner finished appearance
- Additional surface durability
- Easier finishing
- A defined facing layer for duct applications
Joints should still be detailed correctly using compatible tapes and adhesives to maintain the continuity of the insulation system.
XLPE duct insulation for Pakistan projects
For HVAC installations in Lahore, Islamabad, Rawalpindi and Karachi, the specification should account for:
- Outdoor/indoor location
- Ambient temperature
- Relative humidity
- Supply-air temperature
- Duct dimensions
- Condensation risk
- Required insulation thickness
- Mechanical protection
- UV exposure
Outdoor applications require supplementary protection from UV and severe weather according to Scudoflex's product guidance.
Procurement checklist
When requesting an XLPE duct insulation quotation, provide:
- Duct dimensions
- Insulation thickness
- Total surface area
- Indoor/outdoor application
- Facing requirement
- Adhesive/tape requirement
- Fire-performance requirement
- Project location
This allows the supplier to propose the appropriate roll or sheet configuration.