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	CONCRETE BLOCKS
		Dense concrete blocks
		Hollow and cellular
		Fibotherm insulating blocks
		Stowlite lightweight blocks
		Midi blocks
		MACRO blocks
		Generation 2 MACRO blocks
		T-joist first floor profile blocks
		Soap bar blocks, coursing and slip bricks
		Design your own block
		Padstones
		T-Joist first floor recessed profile blocks
		Foundation (trench) blocks

	PAVING SLABS
		Commercial slabs
		Patio paving and wet cast edgings
		Tactile and patterned paving
		Vintage/traditional and decorative
		Permeable paving

	KERBS, EDGINGS & CHANNELS
	KERBS, EDGINGS & CHANNELS

	FLOORING
		T-joist flooring
		Hollowcore flooring
		Flooring blocks
		Accessories
		On-site instructions for pre-cast joists
		On-site instructions for pre-cast hollowcore flooring planks

	FLOORING SOLUTIONS
	For separating floors to help satisfy Robust details part E
		E-FC-1, 4 and 5
		E-FC-8, 9 and 11
		E-FC-1(RSC) and 9(RSC)
		E-FC-6 and 7
	For domestic floors
		D1, D2 and D5
		D3 and D4
	For ground floors to help satisfy Part L
		L1, L2, L3 and L4

	PRE-CAST CONCRETE LINTELS
	PRE-CAST CONCRETE LINTELS

	EDGING, COPING, BOLLARDS AND PILLAR CAPS
	EDGING, COPING, BOLLARDS AND PILLAR CAPS
		Edging, bollards & pillar caps
		Wall coping

	FENCING
		Fencing products
		Semi-dry economy fencing
		Portable post bases
		Concrete barriers

Stowlite lightweight concrete blocks to BSEN 771-3

OVEN DRY DENSITY approx 1450 kg/m³
Size mm	approx weight kg	per tonne	per cube/ band
440x215x100†	14.0	70	44
440x215x140†	19.5	51	32
440x215x190‡•	27.5	36	20
Course adjustments
65x215x100	2.0	500	128
65x215x140	2.8	360	96

† 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.

OPTION 1 FULL FILL	Outside resistance 105mm brick 50mm low emissivity cavity 50mm Kingspan TW50 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE	0.040 0.136 0.644 2.174 0.200 0.230 0.130 3.554 m²K/W 0.281 W/m2K 0.026 0.307 W/m²K


OPTION 2 PARTIAL FILL	Outside resistance 100mm block+19mm render 50mm low emissivity cavity 50mm Kingspan Kooltherm K8 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE	0.040 0.136 0.644 2.380 0.200 0.230 0.130 3.760 m²K/W 0.266 W/m2K 0.026 0.292 W/m²K

OPTION 3 FULL FILL	Outside resistance 105mm brick 100mm Dritherm 32 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE	0.040 0.136 3.125 0.200 0.230 0.130 3.861 m²K/W 0.259 W/m2K 0.026 0.285 W/m²K

	ALSO AVAILABLE 540 x 100 x 215mm Stowlite blocks for use with Stowell flooring T joists, or for quicker block laying (+22%) when building walls. See Flooring blocks page or download data sheet 4.5.
	540mm
		215mm
540mm		100mm

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.

MINIMUM COMPRESSIVE
STRENGTH: 7.3N/mm³

THERMAL CONDUCTIVITY: 0.51W/mk*

THERMAL RESISTANCE:
Size mm	m²K/W at:
440x215x100†	3%m/c 0.20
440x215x140†	3%m/c 0.27
440x215x190‡	3%m/c 0.37
(m/c = moisture content)

SOUND INSULATION:
42 dB (A) (100mm single skin)
44 dB (A) (140mm single skin)

* Tested by BRE
** Calculated using mass law curve

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FOR THIS PRODUCT


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CONCRETE BLOCKS

PAVING SLABS

FLOORING

FLOORING SOLUTIONS

For separating floors to help satisfy Robust details part E

For domestic floors

For ground floors to help satisfy Part L

EDGING, COPING, BOLLARDS AND PILLAR CAPS

FENCING

Stowlite lightweight concrete blocks to BSEN 771-3

† 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.

OPTION 1 FULL FILL

Outside resistance 105mm brick 50mm low emissivity cavity 50mm Kingspan TW50 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE

0.040 0.136 0.644 2.174 0.200 0.230 0.130 3.554 m2K/W 0.281 W/m2K 0.026 0.307 W/m2K

OPTION 2 PARTIAL FILL

Outside resistance 100mm block+19mm render 50mm low emissivity cavity 50mm Kingspan Kooltherm K8 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE

0.040 0.136 0.644 2.380 0.200 0.230 0.130 3.760 m2K/W 0.266 W/m2K 0.026 0.292 W/m2K

OPTION 3 FULL FILL

Outside resistance 105mm brick 100mm Dritherm 32 100mm Stowlite 12.5mm drylining on Dabbs Inside resistance Sum of resistances Uncorrected U-value Correction U-VALUE

0.040 0.136 3.125 0.200 0.230 0.130 3.861 m2K/W 0.259 W/m2K 0.026 0.285 W/m2K

ALSO AVAILABLE 540 x 100 x 215mm Stowlite blocks for use with Stowell flooring T joists, or for quicker block laying (+22%) when building walls. See Flooring blocks page or download data sheet 4.5.

540mm

MINIMUM COMPRESSIVE STRENGTH: 7.3N/mm3

THERMAL CONDUCTIVITY: 0.51W/mk*

THERMAL RESISTANCE:

Size mm

m2K/W at:

440x215x100†

3%m/c 0.20

440x215x140†

3%m/c 0.27

440x215x190‡

3%m/c 0.37

(m/c = moisture content)

SOUND INSULATION: 42 dB (A) (100mm single skin)** 44 dB (A) (140mm single skin)**

* Tested by BRE ** Calculated using mass law curve

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

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site design: carn gerrish creative

† 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.

OPTION 1
FULL FILL

Outside resistance
105mm brick
50mm low emissivity cavity
50mm Kingspan TW50
100mm Stowlite
12.5mm drylining on Dabbs
Inside resistance
Sum of resistances
Uncorrected U-value
Correction
U-VALUE

0.040
0.136
0.644
2.174
0.200
0.230
0.130
3.554 m²K/W
0.281 W/m2K
0.026
0.307 W/m²K

OPTION 2
PARTIAL FILL

Outside resistance
100mm block+19mm render
50mm low emissivity cavity
50mm Kingspan Kooltherm K8
100mm Stowlite
12.5mm drylining on Dabbs
Inside resistance
Sum of resistances
Uncorrected U-value
Correction
U-VALUE

0.040
0.136
0.644
2.380
0.200
0.230
0.130
3.760 m²K/W
0.266 W/m2K
0.026
0.292 W/m²K

OPTION 3
FULL FILL

Outside resistance
105mm brick
100mm Dritherm 32
100mm Stowlite
12.5mm drylining on Dabbs
Inside resistance
Sum of resistances
Uncorrected U-value
Correction
U-VALUE

0.040
0.136
3.125
0.200
0.230
0.130
3.861 m²K/W
0.259 W/m2K
0.026
0.285 W/m²K

ALSO AVAILABLE 540 x 100 x 215mm Stowlite blocks for use with Stowell flooring T joists,
or for quicker block laying (+22%) when building walls. See Flooring blocks page
or download data sheet 4.5.

MINIMUM COMPRESSIVE
STRENGTH: 7.3N/mm³

m²K/W at:

SOUND INSULATION:
42 dB (A) (100mm single skin)
44 dB (A) (140mm single skin)

* Tested by BRE
** Calculated using mass law curve

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