PUF Panel Roofing — Insulated Roof Sheets for Sheds and Site Buildings

Roof panel thickness, profile and facing options

A PUF roof panel is chosen by profile first, then thickness and facing. Roof panels run a trapezoidal or ribbed profile so they shed water and span between purlins, at 1000 mm effective / 1070 mm overall cover width.

Thinner 30–50 mm roof sheets suit site offices and lighter sheds; 60–100 mm suits factory roofs needing stronger heat control; above 100 mm is for cold buildings and is confirmed at quotation.

Where insulated PUF roof panels work best

PUF roof panels earn their place wherever the roof has to do more than keep rain out. The common cases:

• Factory and warehouse roofs — large spans that would otherwise radiate heat all day; the insulated core keeps the floor workable.
• Prefab sheds and site offices — the roof goes on finished, insulated and sealed in one pass over the frame.
• Cold buildings and controlled-temperature rooms — where the roof is part of the thermal envelope, not just cover.
• Re-roofing over old metal — a single insulated sheet replaces separate deck, insulation and lining.

Because the panel is finished on both faces, the underside reads as a clean ceiling — no separate lining trade needed.

Fixing, slope and leak-prevention on PUF roofs

PUF roof panels lock together with tongue-and-groove joints that close side-to-side, and are fixed through to the purlins so the roof acts as one sealed skin. Done right, the joint line is the waterproofing.

Slope, span and fastener pattern are not one-size numbers — they are finalized from the project drawing and confirmed at quotation, because they depend on your purlin spacing, panel length and local conditions. What holds on every job: keep a genuine fall so water runs off, seal end-laps and penetrations, and use the correct fastener and washer for the facing. Under-sloping and skipping end-lap sealing are the two most common causes of a leaking insulated roof — both are avoidable at the drawing stage.

Heat control, condensation and roof durability

The reason to insulate the roof, not just the walls, is that the roof takes the sun. A PUF roof panel has a thermal conductivity of 0.022–0.024 W/m·K and a service temperature of −40°C to +80°C, so it holds a large temperature gap across a thin sheet and keeps interior heat gain down.

The closed-cell PUF core also resists the through-panel moisture path, which is what causes a bare metal roof to drip in humid or cold conditions. On fire, the core is a closed-cell PUF; where a project needs improved fire performance, PIR offers better fire behaviour than standard PUF. We keep this qualitative — no class code or hour rating is stated without test data.

How to get a correct roof panel quotation

For an accurate roof quote, send the roof plan or at least the covered area, the span and purlin spacing, the thickness or heat-control target, the facing and colour, and the site city. With the drawing we finalise slope, panel length and fastener pattern — and price the roof, not just the sheet.

If you also want to sanity-check budget by thickness first, see the current PUF panel rate table by thickness, then send the roof drawing for a firm figure.

Frequently asked questions