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Hemsec External - Vertically Installed

Micro rib external insulated wall panels designed to help create more usable space in a building, whilst providing insulation and fire resistance.

Features and benefits:

  • Designed with exceptional inherent strength which reduces the need for secondary supporting steelwork.
  • Lightweight, factory engineered and fire resistant.
  • Improves the appearance of a building.
  • Full thickness range from 50 mm (U-value of 0.39 W/m²K.) to 200 mm (U-value of 0.10 W/m²K.).
  • CE marked, Loss Prevention Certification Board (LPCB) and Factory Mutual (FM Approval).

25-year panel performance guarantee. This is subject to project specific information. Please contact the manufacturer for further details.

General information

Uniclass 2015

Pr_25_71_14_22 Carbon steel insulating sandwich panelsPrimary


H43/10 Metal insulating sandwich panel

H43/120 Metal insulating sandwich panel

Specification data - Carbon steel insulating sandwich panels

Product Reference

Hemsec External - Vertically Installed



Panel length

2 m

2.4 m

50 mm thickness only.


50 mm

Panel weight: 9.6 kg/m².

80 mm

Panel weight: 11.0 kg/m².

100 mm

Panel weight: 11.6 kg/m².

125 mm

Panel weight: 12.5 kg/m².

150 mm

Panel weight: 13.4 kg/m².

175 mm

Panel weight: 14.4 kg/m².

200 mm

Panel weight: 15.7 kg/m².




100 Rib



Micro rib



On request only.

Profile finish

Colorcoat HPS200 Ultra®

0.5 mm Galvalloy. Plastisol thickness: 200 mm.

Colorcoat Prisma®

0.5mm Galvalloy. Paint thickness: 50 mm.

Colorcoat® LG

0.5mm Z275 HDG. Plastisol thickness: 200 mm.


0.5 mm Z225 HDG. Paint thickness: 25 mm.

Primer/ Liner

0.5 mm Z225 HDG. Paint thickness: 7 mm.


0.5 mm. Paint thickness: 27 mm.


Consult manufacturer and insert requirement.




Consult manufacturer for more details.

Standard product features

Thermal transmittance (U-value):

  • 50 mm thickness: 0.39 W/m²K.
  • 80 mm thickness: 0.25 W/m²K.
  • 100 mm thickness: 0.20 W/m²K.
  • 125 mm thickness: 0.16 W/m²K.
  • 150 mm thickness: 0.13 W/m²K.
  • 175 mm thickness: 0.11 W/m²K.
  • 200 mm thickness: 0.10 W/m²K.

Insulation core:

PIR Polyisocyanurate closed cell insulation, hydrochlorofluorocarbons (HCFC) free and zero ozone depletion potential (ODP) rated core.

Reaction to fire:

  • Polyester coated PIR sandwich panels have a performance in accordance with EN 13501-1:2007+A1:2009: B s2 d0.
  • Plastisol coated PIR sandwich panels have a performance in accordance with EN 13501-1:2007+A1:2009: C s3 d0.

For fire specification on other panel finishes please contact the manufacturer for details.

Fire resistance:

- LPCB LPS 1181 Part 1 Cert:558b:

100–175 mm external wall thicknesses achieve EXT-A30 with 60 minutes integrity and 30 minutes insulation. Maximum unsupported span 4 m (walls). For detailed information visit the Red Book Live website.

- BS EN 13501-2:

Please refer to the Hemsec Fire Rating Matrix document for further detail relating to direct field of application.

Panel joint:

Tongue and groove panel joint achieves good vapour resistance and thermal performance.

Air leakage:

Panel joint air-tightness: 0.01 m³/m²/hr at 50 Pa when tested to EN 12114 in accordance with BS EN 14509: 2013.


All panels have a predicted figure weighted sound reduction Rw = 26 dB.

Load/ span tables:

Consult literature for details.

Product Options


The Hemsec panel cover width is 1155 mm.


- Flashing:

  • Manufactured to match all technical specifications.
  • The same steel coil is used to match flashings to the panels produced in-house.
  • Various designs, folded to a maximum length of 3000 mm.
  • Available with safety folds (excluding galvanized and five-bar aluminium).

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