Thermal Liteblock™

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WINNER Best Interior Building ProductRIAI Architecture Choice Awards

WINNER Best New Product InnovationIrish Build & Design Awards

WINNER Construction Product of the YearIrish Construction Industry Awards

Now including 13N/mm² block

Roadstone Thermal Liteblock is manufactured in Ireland, achieving Thermal conductivity (Lambda λ) values less than 0.33 W/mK, using a special mix which includes light weight aggregates. This mix produces a concrete block with excellent insulation properties, while maintaining structural strength and allowing for traditional construction methods to be used.

Roadstone Thermal Liteblock system combines the Roadstone Thermal Liteblock with the Roadstone concrete block range, which when used in accordance with the Acceptable Construction Details (ACDs), achieves Psi values equal to or better than the standards set out in TGD Part L 2011.

Roadstone have thermally modeled all relevant details in appendix D of TGD L 2011. From this extensive research Roadstone are now in a position to provide detail solutions that comply fully with Psi value requirements outlined in TGD L 2011- Appendix D.



Key features and benefits

  • Reduced Thermal Bridging resulting in reduced heat loss, and lower heating bills.
  • Excellent thermal conductivity (Lambda λ) value less than 0.33 W/mK for masonry block.
  • Robust and durable concrete block with a compressive strength of 7.5N/mm² and 13N/mm²
  • Suits traditional construction methods familiar to Irish and UK designers and builders.
  • CE marked– manufactured to the requirements of I.S. EN 771-3 to System 2+.
  • Thermal Liteblock is required only in key locations in conjunction with the Roadstone Concrete Block range.
  • The Roadstone Thermal Liteblock system is a very cost effective solution and can result in significant savings in the overall build cost
  • Improved (y) value calculations are achieved when using the Roadstone Thermal Liteblock system.
  • When a full building specific (y) value calculation is carried out using the Psi Values incorporating the Roadstone thermal Liteblock, improved (y) value of between 0.03 and 0.06 can typically be achieved.
  • Compliant U-values are achieved without having to provide a cavity in excess of 150mm.
  • Roadstone Thermal Liteblock is unique in colour to enable traceability on site. Photographic recording of the Thermal Liteblock built on site can then form evidence of compliance for the Assigned Certifier, Architects, Engineers and BER assessors.

Thermal Bridging Details

Download the full range of Technical Drawings

Type 1: Cavity Wall – full and partial fill insulation

RS 1.01b FF INSULATION ABOVE SLAB rev-A
RS 1.01b PF INSULATION ABOVE SLAB revA
RS 1.02b FF INSULATION BELOW SLAB revA.pdf
RS 1.02b PF INSULATION BELOW SLAB revA
RS 1.04 INTERMEDIATE FLOOR CONCRETE revA
RS 1.04a INTERMEDIATE FLOOR CONCRETE revA.pdf
RS 1.05-&-1.05a-TIMBER-INTERMEDIATE-FLOOR revA
RS 1.06.1 PLAN PARTY WALL revA
RS 1.09a EAVES 215 TLB TRUSS ROOF revA
RS 1.15 GABLE WALL- CEILING revA
RS 1.19 FLAT ROOF EAVES revA
RS 1.20 FLAT ROOF PARAPET revA
RS 1.21 WINDOW HEAD + 1 TLBLOCK revA
RS 1.23.1 WIND HD – PRESTRES LINTL + 1 TLBLOCK revA
RS 1.23.2 WIND HD – PRESTRES LINTL + 1 TLB+CLOSER revA
RS 1.24 WIND JAMB RSTLB CLOSER SPECIAL revA
RS 1.26.2 WIND SILL + CLOSER revA

Type 2: External insulation onto masonry walls

RS 2.01 GF INSU ABOVE SLAB – WALL – EXT INSULATION revA
RS 2.02 GF INSU BELOW SLAB – WALL – EXT INSULATION revA
RS 2.14 WALL EXT INSULATION – CEILING revA
RS 2.19 WALL EXT INSULATION – PARAPET revA

Type 4: Framed Construction

RS 4.02 TIMBER FRAME WALL – FLOOR + 140 SPECIAL RSTLB revA
RS 4.23.1 TF PARTY WALL CAVITY – FLOOR + RSTLB revA
RS 4.23.2 TF100 PARTY WALL – FLOOR + RSTLB revA

Type 6: Internal insulation with twin-pot cavity block

RS 6.04 TWIN POT – TIMBER INTERMEDIATE FLOOR revA
RS 6.08 & 6.09 TWIN POT EAVES revA
RS 6.11 TWIN POT – SLOPED CEILINGS revA

Type G: Partitions and Separating or Party Walls

RS G.01.1 SEPARATING CAV WALL HEAD + RSTLB revA
RS G.01.2 SEPARATING 215 WALL HEAD + RSTLB revA
RS G.05.1 SEPARATING WALL – FLOOR revA
RS G.05.2 SEPARATING WALL (100) – FLOOR revA

Bespoke: Roadstone Certified Details

RS BWH 001 BAY WIN HEAD SHS EXT. WALL revA
RS LTR 001 EAVES AND WALL WITH UB revA
RS TH 001 THRESHOLD DETAIL revA

FAQ >> Download Declaration of Performance >> Download Brochure >>

Quick Queries

You can download the Thermal Liteblock brochure here or if you have any other questions feel free to ask us here and we’ll respond to you as soon as possible.

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Alternatively you can contact a member of our support team directly.

Alan Lowe - Product Development Manager (01-4041368)
Thomas Holden, Technical Support - East, (01-4041264)
Ciaran Collier, Technical Support - West, (01-4041373)
Michael Vaughan, Technical Support - South, (061-709500)

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