our range

CONCRETE BLOCKS

 

Dense concrete
blocks 7.3N/mm2

 

Dense concrete
blocks/bricks 10.4N/mm2

 

Dense concrete
blocks 17.5N/mm2

 

Fibotherm insulating
blocks/bricks 3.6N/mm2

 

Stowlite medium dense
blocks/bricks 7.3N/mm2

 

Stowlite medium dense blocks/bricks 10.4N/mm2

 

Hollow and cellular concrete blocks 7.3N/mm2

 

Concrete midi blocks

 

Concrete soap bar blocks

 

T beam flooring system...
first floor T profile blocks

 

T beam flooring system... first floor recessed T profile blocks

 

Generation 2 MACRO blocks

 

Foundation (trench) blocks

 

Padstones

 

Close texture concrete
blocks 7.3N/mm2

 

Stowell 178 blocks
10.4N/mm2 & 7.3N/mm2

 

Stowell 540 blocks
7.3N/mm2

 

Your own block design...

PAVING SLABS

 

Commercial slabs

 

Patio paving and wet
cast edgings

 

Tactile and patterned paving

 

Vintage flagstones...
traditional style decorative flags

KERBS, EDGINGS & CHANNELS

FLOORING PRODUCTS
(T beams)

 

 

Concrete pre-stressed T beams (concrete joists)

 

Stowell solutions for domestic and separating floors

 

Accessories

 

On-site instructions for pre-cast T beams (concrete joists)

PRE-CAST CONCRETE LINTELS

COPING, EDGING & BOLLARDS

 

Edging, bollards & pillar caps

 

Wall coping

CONCRETE FENCING PRODUCTS

 

 

Wetcast fencing products

 

Semi-dry economy fencing

 

Portable post bases

 

Concrete barriers

 

Kentledge blocks
(ballast blocks)

 

Dividing blocks

 Stowlite
 medium dense
blocks/bricks 7.3N/mm2 to BS EN 771-3

7.3N/mm2 (OVEN-DRY DENSITY approx 1500 kg/m3)
Size mm
nominal
approx
weight kg
no. per
tonne
multiples
of
no. per
pack
440 x 100 x 215† 14.0 70 44 88
440 x 140 x 215† 19.5 51 32 64
440 x 190 x 215‡ 27.5• 36 20 40
Course adjusters
215 x 100 x 65 2.0 500 128 512
215 x 140 x 65 2.8 360 96 384
† Also available in close textured 7.3 N/mm2
‡ To order only
• Blocks in excess of 20kg – please use with caution after assessing the risks.

U-Value 0.20

Fibotherm lightweight insulating block - option 1
Outside resistance    0.040
19mm sand/cement render (λ 1.00)    0.019
100mm Dense 7.3N/mm2 (λ 1.43)    0.067
50mm low emissivity cavity    0.640
50mm foil-faced partial fill PIR/PU board (λ 0.022)    2.273
100mm Stowlite 7.3N/mm2  (λ 0.63)    0.152
15mm dabs    0.170
40mm phenolic insulation (λ 0.022)    1.819
bonded to...
13mm plasterboard (λ 0.21)    0.062
Inside resistance    0.130
Sum of resistances    5.372 m2K/W
Uncorrected U-value    0.186 W/m2K
Mortar correction    0.000
Air gap correction    0.010
Wall tie correction - Staifix HRT4-225    0.001
U-VALUE    0.197 W/m2K


U-Value 0.20

Fibotherm lightweight insulating block - option 2
Outside resistance    0.040
19mm sand/cement render (λ 1.00)    0.019
100mm Dense 7.3N/mm2 (λ 1.43)    0.067
150mm high performance mineral wool (λ 0.032)    4.688
100mm Sowlite 7.3N/mm2 (λ 0.63)    0.152
13mm dense plaster (λ 0.57)    0.023
Inside resistance    0.130
Sum of resistances    5.119 m2K/W
Uncorrected U-value    0.195 W/m2K
Mortar correction    0.000
Air gap correction    0.000
Wall tie correction - Staifix HRT4-250    0.002
U-VALUE    0.197 W/m2K


U-Value 0.20

Fibotherm lightweight insulating block - option 3
Outside resistance    0.040
19mm sand/cement render (λ 1.00)    0.019
100mm Dense 7.3/mm2 (λ 1.43)    0.067
50mm low emissivity cavity    0.640
95mm foil-faced partial fill PIR/PU board (λ 0.022)    4.318
100mm Stowlite 7.3N/mm2 (λ 0.63)    0.152
13mm dense plaster (λ 0.57)    0.023
Inside resistance    0.130
Sum of resistances    5.389 m2K/W
Uncorrected U-value    0.186 W/m2K
Mortar correction    0.000
Air gap correction    0.010
Wall tie correction - Staifix HRT4-250    0.002
U-VALUE    0.198 W/m2K


 
The Stowlite concrete block offers the builder an alternative product midway in the range between the dense concrete block and the high performance Fibotherm block. Stowlite blocks are widely used in a number of applications where high insulation is not such a priority. Being lighter than the standard dense block, handling is easier, often making savings on foundations and labour.

Standard Stowlite blocks provide a good finish for rendering. Stowlite blocks are available in close texture finish, please CLICK HERE for more information.
THERMAL CONDUCTIVITY: λ*
0.63 W/mK* @ 3% m/c (Inside skin)
0.67 W/mK* @ 5% m/c (Outside skin)
THERMAL RESISTANCE:
Size
mm
m2K/W at:
m2K/W at:
100
3%m/c 0.152
5%m/c 0.143
140
3%m/c 0.216
5%m/c 0.263
190
3%m/c 0.300
5%m/c 0.282
(m/c = moisture content)
SOUND INSULATION:**
44dB(A) 100mm single skin, 200kg/m2
46dB(A) 140mm single skin, 262kg/m2
47dB(A) 190mm single skin,348kg/m2
FIRE RESISTENCE:***
100mm (single skin unplastered) 2 hrs
140mm (single skin unplastered) 3 hrs
190mm (single skin unplastered) 6 hrs
*
Calculated from oven dry density
**
Calculated using mass law curve - BS8233 (with 2 skins of dense plaster each 25kg/m2)
***
Calculated using table 14
BS5628-3 2005
DOWNLOAD PDF DATA SHEET
FOR THIS PRODUCT
 

Stowell Concrete Limited, Arnolds Way, Yatton Bristol BS49 4QN
Tel: 01934 834000   Fax: 01934 835474   Email: sales@stowellconcrete.co.uk

Registered Name: Stowell Concrete Limited. Place of Registration: England. Registered No: 1059577.
Address of Registered Office: Arnolds Way, Yatton, Bristol BS49 4QN
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