Every Isotex ICF system.
One specification platform.

Filter and compare 17 products across four systems — insulated HDIII walls, HB formwork, acoustic partitions and wood-cement floor slabs. Specify by project type, thermal target or structural requirement. NBS clauses, BIM objects and EPD data available for every product in the range.

By project type Residential, Commercial & Social Match products to your project sector — incl. PassivHaus, PNRR & mid-rise
By thermal performance Set a U-value target From U 0.11 PassivHaus to U 0.27 W/m²K — filter by thermal requirement
By structural need Infill, Loadbearing or Mid-rise Filter by RC core capacity — from infill walls to high-structural 38-series
↑ Request Specification Pack ⊟ Technical Library
Compare systems →
17 Products
4 Systems
0.11 Best U-value W/m²K
REI 120 Fire rating
CE All products
EPD S-P-01472
Showing 5 featured systems from the full 22-product Isotex range 5 products · live (pages)
No filters active
HD III 44 Series Flagship Thermal Range
440mm total wall · maximum EPS insert · PassivHaus and NZEB compliant
U 0.15
HDIII 44/20 — Isotex ICF block
HD III 44 Series

HDIII 44/20

U 0.15 W/m²K · NZEB compliant

0.15 U-value
REI 120 Fire
Class I (best) Acoustic
Pending Wall
NZEB Loadbearing
View Product →
U 0.15
HD III 44 Series

HDIII 44/17

170mm EPS · U 0.15 W/m²K · NZEB compliant

0.15 U-value
REI 120 Fire
53 dB Acoustic
Pending Wall
NZEB Loadbearing
View Product →
U 0.21
HDIII 44/14 — Isotex ICF block
HD III 44 Series

HDIII 44/14

140mm EPS · U 0.21 W/m²K · maximum structural capacity

0.21 U-value
REI 120 Fire
53 dB Acoustic
440mm Wall
Loadbearing
View Product →
U 0.11
HDIII 44/23 — Isotex ICF block
HD III 44 Series

HDIII 44/23

230mm EPS · U 0.11 W/m²K · high-insulation infill option

0.11 U-value
REI 120 Fire
53 dB Acoustic
440mm Wall
PassivHaus NZEB Infill
View Product →
HD III 38 Series Structural Loadbearing Range
380mm total wall · maximum RC core · mid-rise, social housing and PNRR
U 0.15
HDIII 38/17 — Isotex ICF block
HD III 38 Series

HDIII 38/17

170mm EPS · U 0.15 W/m²K · NZEB compliant

0.15 U-value
REI 120 Fire
53 dB Acoustic
380mm Wall
NZEB
View Product →

No products match your current filters

Performance map

Thermal performance vs structural capacity

All HDIII products — U-value (lower = better thermal) · bubble size = total wall depth

Download Full Spec Pack →
Thermal vs structural: U-value W/m²K vs RC core thickness
44-series · Flagship thermal
38-series · Structural
Bubble size = wall depth (380–440mm)
System specification comparison: HD III 44 vs HD III 38 vs HB Formwork
Specification HD III 44 HD III 38 HB
Best U-value0.110.15— structural
Fire resistanceREI 120REI 120REI 120
Acoustic Rw60 dB58 dB— structural
Seismic (EC8)✓ Z1–2✓ Z1–2✓
PassivHaus✓ 44/23——
Superbonus 110%✓✓—
PNRR certified✓✓✓
Configurations434
CECE · ETA-08/0023
BBABBA Certified
EPDEPD S-P-01472
R120REI 120
EC8Seismic Z1–2
PNRPNRR
SBSuperbonus 110%
Free technical support

Not sure which block to specify?

Our technical team provides free feasibility studies, U-value calculations and compliance reviews for UK and Caribbean projects.

NBS specification clauses — ready to use
BIM objects — Revit, ArchiCAD, IFC, DWG
EPD data — S-P-01472 · Environdec verified
U-value calculations — free project review
Request Specification Pack Technical Hub
Speak to the team

Technical consultation — free

Whether you're specifying a single dwelling, a social housing scheme, or a PNRR-eligible development — our engineers will help you select the right system and configuration.

UK — English building regulations
Caribbean — Dominican Republic market
Italy — PNRR & Superbonus compliance
Book Consultation Request Samples
Isotex · Verona, Italy · Est. 1987

Build with confidence.
Specify with precision.

NBS clauses, BIM objects, U-value calculations and EPD documentation — one pack, one working day.

90,000+Buildings delivered
0.11U-value W/m²K
EI 180Fire resistance
38+Years manufacture
Request Specification Pack View Technical Hub Speak to Our Team