The Hi FIXOLITE range
The Hi Fixolite range meets the most stringent standards for external thermal insulation (ITE), with a thermal resistance of up to 11. The block complies with the RE2020 and passive houses and BEPOS.
Hi blocks are referenced by their thickness according to the following nomenclature:
The Hi range comprises 10 different blocks (all based on the B-CL25/17 block) with polystyrene insulation thicknesses ranging from 17 cm to 34 cm:
- 5 blocks with a 12 cm thick concrete shell
- 5 blocks with a 14 cm veil
For each of the 5 widths, there are corner pieces (left or right angle - seen from the outside as in the diagram below). These parts are grooved polystyrene blocks with mortise and tenon joints:
- B-HI35.AG and B-HI35.AD: 10 cm wide
- B-HI38.AG and B-HI38.AD: 12.5 cm wide
- B-HI40.AG and B-HI40.AD: 15 cm wide
- B-HI45.AG and B-HI45.AD: 20 cm wide
- B-HI50.AG and B-HI50.AD: 25 cm wide
| Block thickness | Concrete veil 12 cm = 95 L/m². | Concrete veil 14 cm = 110 L/m². |
|---|---|---|
| 35 cm | B-HI35/12+19 | B-HI35/14+17 |
 CU: 0.18 R : 5.56 |  CU: 0.19 R : 5.26 | |
| 37.5 cm | B-HI38/12+22 | B-HI38/14+20 |
 CU: 0.15 R : 6.67 |  CU: 0.16 R : 6.25 | |
| 40 cm | B-HI40/12+24 | B-HI40/14+22 |
 CU: 0.14 R : 7.14 |  CU: 0.15 R : 6.67 | |
| 45 cm | B-HI45/12+29 | B-HI45/14+27 |
 UC: 0.11 R : 9.09 |  CU: 0.12 R : 8.33 | |
| 50 cm | B-HI50/12+34 | B-HI50/14+32 |
 CU: 0.09 R : 11.11 |  CU: 0.10 R : 10.00 |
Technical specifications
| Thermal performance | R from 5.26 to 11.11 m².K/W U from 0.19 to 0.09 W/m².K (calculation of the block without concrete and without rendering or facing) |
| Thermal insulation | Lambda wood-cement: 1.104 W/m².K Lambda graphite polystyrene: 0.031 W/m².K |
| Sound absorption | > 90 % between 100 and 5000 Hz |
| Acoustic insulation | -50 dB - 20 cm plastered wall with 12 cm concrete shell -56 dB - 25 cm plastered wall with 16 cm concrete shell |
| Flexural strength | ~ 200 DaN (wall not filled with concrete) |
| Fire resistance | > 6 hours according to ISO 834 |
| Fire classification | Non-flammable, classified M1 |
| Rot-proof | Yes |
| Dimensions | |
| Width | 50 cm |
| Height | 25 cm |
| Depth | from 35 to 50 cm |
| Concrete veil | 12 or 14 cm (or more on request) |
| Polystyrene | from 17 to 34 cm |
Implementation
Cutting a block
Cut the central tenon to the required width (here 12 cm) and join the two parts together to obtain a 38 cm block. This process preserves the mortise and tenon joints for optimum hold. This cut is made on site.
External angle
Two blocks and a corner piece (in this case the left-hand corner) form the corner.
Alternate left and right angles for cross-joint construction.
The corner block is cut to allow the ties and concrete to pass through. This is done on site.
Internal angle
Two blocks form an internal angle.
The corner block (shown here in the left-hand corner) supplied by Fixolite has no opening for concrete.
The corner block needs to be cut out of the polystyrene. Here, cut 12.5 cm from the edge for the 37.5 cm block (HI 38/12+22):
50 - 37.50 = 12.50 cm.
This cutting is carried out on site.
Internal angle and aperture
Create the opening using corner pieces (in this case right-angle pieces).
The left and right corner cut-outs alternate for cross-joint construction.
The diagram shows an internal corner with a finish for an opening (in this case a door).
External angle, internal angle and aperture
Opening with additional insulation
Adjust the height of the opening by cutting slices of block (here cut to 15 cm). Slices can be cut on site or in the factory on request.
A lintel is not necessary in all configurations. Here, there is no lintel, but in this case, a chain link must be laid between the two rows of blocks above the opening.
The sides are trimmed with corner pieces.
Insulation with invert
Place the blocks with the insulation protruding above the floor slab. To avoid thermal bridges, extend the Fixolite insulation at invert level with XPS panels.
Fixolite blocks can be buried in the ground. Always place a waterproofing membrane (elastomer) in front of the blocks and the XPS insulation, possibly lined with a honeycombed drainage membrane.
