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Fibotherm insulating blocks/bricks 3.6N/mm² to BS EN 771-3

Products / Fibotherm insulating blocks/bricks 3.6N/mm²
Stowell Fibotherm blocks are ideal for...
  • INNER OR OUTER LEAF OF CAVITY WALLS
  • PARTITION WALLS
Stowell Fibotherm blocks offer the following advantages...
  • HIGH INSULATION
  • LOW SITE BREAKAGE
  • GOOD FIXING
  • LOW SHRINKAGE
  • LOW DENSITY
  • EXCELLENT PLASTER KEY
All products available ex works. Prices on application. Please contact the sales office for further information and a quotation. For information on packaging click here .
Insulating Blocks ~ 3.6N/mm² (OVEN-DRY DENSITY approx 850 kg/m³)
Size mm nominal (L x W x H) approx weight kg no. per tonne multiples of no. per pack
440x75x215 6.7 150 60 120
440x100x215 10.0 100 44 88
440x140x215 14.0 80 32 64
Coursing Bricks ~ 3.6N/mm² (OVEN-DRY DENSITY approx 850 kg/m³)
Size mm nominal (L x W x H) approx weight kg no. per tonne no. per pack
215x100x65 1.35 740 452
215x140x65 1.9 530 296
Download UKCA Declaration
THERMAL CONDUCTIVITY: λ*
0.29 W/mK @ 3% m/c (Inside skin)
0.32 W/mK @ 5% m/c (Outside skin)
THERMAL RESISTANCE:
SIZE mm m²K/W at: m²K/W at:
75mm 3% m/c 0.259 5% m/c 0.243
100mm 3% m/c 0.345 5% m/c 0.313
140mm 3% m/c 0.483 5% m/c 0.438
(m/c = moisture content)
WEIGHTED SOUND INSULATION Rw:**
40 dB (75mm single skin, 121kg/m²)
41 dB (100mm single skin, 142kg/m²)
43 dB (140mm single skin, 180kg/m²)
FIRE RESISTANCE:***
75mm @60% loading  ½hr
100mm  2 hrs
140mm  3 hrs
* Calculated from oven dry density
** Calculated using mass law curve - BS8233 (with 2 skins of dense plaster each 25kg/m²)
*** Calculated using table NA 3.2 BS EN 1996-1-2 : 2005 (unplastered separating load bearing single leaf walls)

U-Value 0.18

Fibotherm insulating blocks/bricks 3.6/mm² to BS EN 771-3
Outside resistance 0.040
19mm sand/cement render (λ1.00) 0.019
100mm dense 7.3N/mm² (λ1.43) 0.070
50mm low emissivity cavity 0.640
50mm foil-faced partial fill PIR/PU board (λ0.022) 2.273
100mm Fibotherm 3.6N/mm² (λ0.29) 0.345
15mm dabs 0.170
37.5mm phenolic insulation (λ0.018) 2.083
bonded to…
13mm plasterboard (λ0.21) 0.062
Inside resistance 0.130
Sum of resistances 5.832 m²K/W
Uncorrected U-value 0.171 W/m²K
Mortar correction 0.001
Air gap correction 0.002
Wall tie correction – Staifix HRT4-225 0.002
U-VALUE 0.176 W/m²K

U-Value 0.18

Outside resistance 0.040
19mm sand/cement render (λ1.00) 0.019
100mm dense 7.3N/mm² (λ1.43) 0.070
160mm high performance mineral wool (λ0.032) 5.000
100mm Fibotherm 3.6N/mm² (λ0.29) 0.345
13mm dense plaster (λ0.057) 0.023
Inside resitance 0.130
Sum of resistances 5.627 m²K/W
Uncorrected U-value 0.178 W/m²K
Mortar correction 0.001
Air gap correction 0.000
Wall tie correction – Ancon ST1-300 0.004
U-VALUE 0.183 W/m²K

U-Value 0.16

Fibotherm insulating blocks/bricks 3.6/mm² to BS EN 771-3
Outside resistance 0.040
19mm sand/cement render (λ1.00) 0.019
100mm dense 7.3N/mm² (λ1.43) 0.070
50mm low emissivity cavity 0.640
100mm foil-faced partial fill PIR/PU board (λ0.018) 5.556
100mm Fibotherm 3.6N/mm² (λ1.33) 0.345
13mm dense plaster (λ0.057) 0.023
Inside resistance 0.130
Sum of resistances 6.823 m²K/W
Uncorrected U-value 0.147 W/m²K
Mortar correction 0.001
Air gap correction 0.006
Wall tie correction – Ancon ST1-300 0.005
U-VALUE 0.159 W/m²K
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