PUF Panel Thickness Guide: How Many mm Do You Need?
Choosing the wrong PUF panel thickness is a common and costly mistake in prefab construction. Too thin, and you lose cooling or heating efficiency. Too thick, and you pay for insulation you don’t need. This guide from Kaizen PreFab helps you pick the right thickness for your project.
Quick answer: PUF panels in India are commonly sold from 40 mm to 150 mm. Sheds and site cabins usually need 40-60 mm, chilled rooms 60-100 mm, and frozen storage 100-150 mm or more.
What Does PUF Panel Thickness Mean?
A PUF (polyurethane foam) panel is a sandwich of two metal sheets with a rigid foam core. Thickness refers to that insulating core. A thicker core slows heat transfer more, so the space holds its temperature with less energy. Standard sizes are typically 40, 50, 60, 80, 100, 120 and 150 mm.
Recommended Thickness by Application
| Application | Typical thickness |
|---|---|
| Industrial shed roof and walls | 40-50 mm |
| Prefab office or site cabin | 50-60 mm |
| Temperature-controlled warehouse | 50-80 mm |
| Chilled room (0 to 5°C) | 60-80 mm |
| Freezer (-18 to -25°C) | 100-125 mm |
| Deep freezer or blast chiller | 125-150 mm or more |
These are indicative ranges. Your final choice should come from a heat-load calculation for your site.
5 Factors That Decide Your Thickness
- Temperature difference: The gap between inside and outside temperature matters most. A -20°C freezer in a hot climate needs far more insulation than an office cabin.
- Location and climate: Sites with strong sun and high summer temperatures benefit from thicker roof panels.
- Fire and code requirements: Check the fire rating and certification you need before finalising the panel grade.
- Span and structural support: Thicker panels are stiffer, which can allow wider spacing between supports. Confirm load limits with the manufacturer.
- Budget and running cost: A thicker panel costs more upfront but can cut electricity bills over the building’s life, especially in cold storage.
Common Mistakes to Avoid
- Choosing on price alone. The cheapest panel often costs more in energy within a few years.
- Ignoring joints, doors and floors. Poorly sealed joints and uninsulated floors can undo the benefit of thick walls.
- Using one thickness everywhere. Roofs gain more heat than walls, so they often justify a thicker panel.
- Skipping the load calculation. Guessing leads to over-spending or under-performing.
How Kaizen PreFab Can Help
At Kaizen PreFab, our engineering team looks at your temperature requirement, location, building size and budget before recommending a PUF panel thickness. We then supply panels matched to your design and can coordinate them with your PEB structure, so roofing, walls and framing work together.
Planning a cold room, warehouse or prefab building? Send us your plot size and operating temperature, and we’ll recommend the right thickness and share a quotation. Book a free consultation with Kaizen PreFab today.
Thickness figures in this guide are general guidance. Always confirm the final specification with a qualified engineer.
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