Is 13mm pipe insulation enough? | FUNAS Guide
This article examines whether 13mm pipe insulation is sufficient for thermal efficiency, covering material performance, energy savings, and industry standards.
# Is 13mm Pipe Insulation Enough?
Professionals in thermal insulation often question whether 13mm pipe insulation provides adequate thermal efficiency. This article explores key factors, including material properties, industry standards, and application suitability.
Key Considerations for 13mm Pipe Insulation
1. Thermal Conductivity & Efficiency
- Thin insulation (13mm) may not meet energy-saving requirements for high-temperature pipes.
- Lower R-values compared to thicker insulation (25mm+), reducing heat retention.
- Best for moderate climates where minimal heat loss/gain is acceptable.
2. Industry Standards & Compliance
- ASHRAE 90.1 recommends thicker insulation for pipes >1 diameter in HVAC systems.
- BS 5422 (UK) suggests 19mm+ for hot water pipes to prevent condensation.
- ISO 12241 provides guidelines based on pipe temperature and ambient conditions.
3. Material Performance
- Elastomeric foam (13mm): Effective for condensation control in chilled water lines.
- Fiberglass (13mm): Limited heat retention; better for low-temperature applications.
- Polyethylene (13mm): Lightweight but less efficient for high-heat pipes.
4. Energy Savings & Cost Impact
- Thinner insulation = higher energy loss, increasing operational costs over time.
- Payback period: Thicker insulation (25mm+) often justifies higher upfront costs with long-term savings.
5. Common Applications for 13mm Insulation
- Domestic plumbing (low-pressure hot water).
- Refrigeration lines (condensation prevention).
- Temporary installations where space is limited.
When to Choose Thicker Insulation
- High-temperature systems (steam pipes, industrial processes).
- Outdoor/exposed pipes requiring frost protection.
- Strict energy compliance projects (LEED, BREEAM).
Final Recommendation
While 13mm pipe insulation works for specific low-demand applications, professionals should evaluate heat loss requirements, material type, and compliance standards before selection. For optimal energy efficiency, thicker insulation (≥19mm) is often preferable.
For expert guidance on thermal insulation solutions, explore FUNAS’ industry-leading materials and technical support.
By addressing key concerns with data-backed insights, this article helps professionals make informed decisions on pipe insulation thickness. For further reading, refer to ASHRAE, ISO, and BS standards for detailed thermal performance metrics.

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