Product Overview

Kingspan Insulated Panel Systems Benchmark Topspan Image
  • Suitable for frame-to-frame spanning of up to 8 metres subject to roof loadings.
  • Reduces need for secondary steel.
  • Installation rates of up to 1000m2 per day with the aid of mechanical handling equipment.
  • Ideal for zinc, stainless steel and aluminium standing seam systems and single-ply membranes.
  • Suitable for flat, low pitch and curved roof applications.
  • Lifetime insulation continuity, thermal performance and airtightness (less than 3m3/hr/m2) certainty.

Topspan insulated roof deck combines a structural deck and metal top sheet in one product. The panels are suitable for all metal types, membranes and liquid plastics.

Technical Detail

Product Snapshot
Product Dimensions
Product Weight & Thermal Performance
Colours & Coatings
Fire Compliance & Environmental Ratings


Topspan is a PIR insulated roof deck combining a structural deck and metal top sheet in one product. The panels are suitable for zinc, stainless steel and aluminium standing seam waterproofing systems and single-ply membranes. 
Topspan provides a clear span capability of up to 8 metres and is faster to install than alternative built-up roof
deck systems. The internal face of the deck is pre-finished with a fresh white inner coating that provides a smooth clean interior finish. Topspan is suitable for flat or curved roof applications with a convex or concave radius of 20 metres and is ideal or new build or refurbishment projects.

Kingspan Insulated Panel Systems Topspan Dimensions Image

Available Lengths

Standard lengths are from 1.8 up to 14 metres. Lengths over 14 metres and up to 16 metres can be supplied but are subject to an additional transport surcharge.

Thermal Performance
Core Thickness (mm) 66  102 126
U-Value (W/m2K) 0.25 0.18# 0.15#
Weight kg/m2 20.4 21.8 22.8

The recommended roof U-values are dependent on the method chosen:
Overall Heat Loss Method ≤ 0.25 W/m²K
Elemental Heat Loss Method ≤ 0.20 W/m

Acoustic Performance

Topspan panels have a predicted single-figure weighted sound reduction Rw = 27dB

Colours and Coatings

Available in steel

External weathersheet options: Kingspan CLEANsafe 15 bright white (standard).  Internal Profile deck sheet: Kingspan CLEANsafe 15 bright white (standard)

External: galvanised or Kingspan CLEANsafe 15


Steel inner and outer facings have a predicted Class 1 surface spread of flame to BS476 Part 7: 1987, and are Class 0 as defined by Building Regulations.

The panel surfaces are rated FAA/SAA to BS476: Part 3: 1975.


BENCHMARK Topspan Datasheet

Alternative Roofing Options

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