SIP 174 panel ·
external wall

The wall panel of our standard range, for homes, extensions and bungalows, to the project design.

Use: External wall
Format: 1200 × 2500 mm
Panel U-value: ≈ 0.24 W/m²K*
Weight, approx.: ≈ 17–18 kg/m²; ≈ 52–54 kg per panel
Price: Within 24 h from plans or m²; + VAT

Get a price for this panel Request the data sheet

Illustration: SIP 174 panel taken apart into layers: OSB/3, 150 mm EPS and OSB/3 — Visualisation

Build-up and dimensions

* U: indicative calculated value, pending data sheet.

Joints and assembly

Outer face: OSB/3, 12 mm
Core: Flame-retardant EPS, 150 mm
Inner face: OSB/3, 12 mm
Total thickness: 174 mm
CTE wall limit, zone B: 0.56 W/m²K
EPS density and tolerances: In the data sheet
Loads and spans: Per the project’s structural design
Jointing timber: C24, as calculated

Use and assembly

Store flat, on bearers and under cover. Outside, insulated render or a ventilated facade; inside, an EI 30 layer, usually plasterboard. Your crew or ours puts it up (ours in Spain).

Get a price for this panel

SIP wall with EPS facade boards over the OSB and a window opening, in the shade of a tree — Wall with EPS facade boards · Real build, 11 Jan 2026

Data sheet on request.

Request the data sheet

SIP 174 questions

Does the panel meet the CTE on insulation?

The panel’s U-value is below the CTE limit for zone B: SIP 174 wall, ≈ 0.24 W/m²K (limit 0.56); SIP 174 C roof, ≈ 0.24 (limit 0.44). Indicative calculated values, pending data sheet.

How does it perform in a fire?

Like any home, it has to meet CTE DB-SI: R 30 for the structure of a detached house. The core is protected inside by an EI 30 layer, usually plasterboard; the SIP 174 EPS is flame-retardant.