Precast Concrete Data

Jersey

	Average Block Mass (Kg) MC 3%	No per Grab	Mass per Grab (Kg)	Block Density Kg/m³ MC 3%	K Value W/m.K MC 3%	R Value m² K/W MC 3%	Blocks per m²	Blocks per m² Laid on Flat inc Mortar	Blocks per m² Laid Upright inc Mortar	Insitu Blocks % m²	Wall Mass Kg/m² Laid Flat	Wall Mass Kg/m² Laid Upright	Fire Resistance Class	Sound Insulation based on Mass Law Laid on Flat	Sound Insulation based on Mass Law Laid Upright

Standard Dense Block 7.3N/mm²
440 x 75 x 215mm	14.6	88	1285	2257	1.46	0.048	10.57	27.78	9.88	93.43	483	157	A1	56	45
440 x 100 x 215mm	19.3	72	1390	2073	1.46	0.068	10.57	20.20	9.88	93.43	446	208	A1	55	48
440 x 140 x 215mm	27.9	48	1339	2131	1.46	0.096	10.57	14.81	9.88	93.43	458	298	A1	55	51
440 x 100 x 140mm	12.3	108	1326	2044	1.46	0.068	16.23	20.20	14.81	91.26	287	205	A1	51	48
440 x 140 x 140mm	18.1	72	1300	2132	1.46	0.096	16.23	14.81	14.81	91.26	298	298	A1	51	51
Brick 215 x 100 x 065mm	2.6	432	1106	2055	1.45	0.045	46.51	59.26	40.40	86.87	206	134	A1	48	44
Hollow 440 x 220 x 215mm	32.2	32	1029	1556	0.96	0.229	10.57	9.88	93.43	6.57	4.79	N/A	A1	N/A	N/A

Fairfaced Dense Block 7.3N/mm²
440 x 100 x 215mm	19.1	72	1375	2052	1.40	0.071	10.57	20.20	9.88	93.43	442	206	A1	55	48
440 x 140 x 215mm	26.9	48	1291	2055	1.41	0.099	10.57	14.81	9.88	93.43	442	288	A1	55	51

High Crush Dense Block 10.4N/mm²
440 x 100 x 215mm	19.8	72	1428	2131	1.54	0.065	10.57	20.20	9.88	93.43	458	213	A1	55	48
440 x 140 x 215mm	27.8	48	1334	2123	1.52	0.092	10.57	14.81	9.88	93.43	456	297	A1	55	51

High Crush Dense Block 22.5N/mm²
440 x 100 x 215mm	20.8	72	1498	2235	1.65	0.061	10.57	20.20	9.88	93.43	479	223	A1	56	49
440 x 140 x 215mm	29.2	48	1402	2230	1.64	0.085	10.57	14.81	9.88	93.43	478	311	A1	56	52

Medium Density Block 7.3N/mm²
440 x 140 x 215mm	23.5	48	1152	1795	1.13	0.124	10.57	14.81	9.88	93.43	390	254	A1	54	50

Lightweight Block 7.3N/mm²
440 x 100 x 215mm	14.6	72	1051	1569	0.76	0.132	10.57	20.20	9.88	93.43	345	160	A1	53	45
440 x 140 x 215mm	19.7	48	946	1505	0.63	0.222	10.57	14.81	9.88	93.43	332	216	A1	52	48

Cellular Euro Block 7.3N/mm²
440 x 140 x 215mm	19.5	48	936	1475	0.96		10.57	14.81	9.88			209	A1

MC = Moisture Content
W/m.K = Thermal Conductivity
m² K/W = Thermal Resistance
Kg/m³ = Kilogrammes per Cubic Metre
Kg/m² = Kilogrammes per Square Metre

This data and information is for guidance purposes only. No responsibility will be accepted for any incorrect interpretation and / or use of the data and information contained within this table.

Updated: June 2023

Guernsey

	Average Block Mass (Kg) MC 3%	No per Grab	Mass per Grab (Kg)	Block Density Kg/m³ MC 3%	K Value W/m.K MC 3%	R Value m² K/W MC 3%	Blocks per m²	Blocks per m² Laid on Flat inc Mortar	Blocks per m² Laid Upright inc Mortar	Insitu Blocks % m²	Insitu Mortar % m²	Wall Mass Kg/m² Laid Flat	Wall Mass Kg/m² Laid Upright	Fire Resistance Class	Sound Insulation based on Mass Law Laid Upright

Standard Dense Block 7.3N/mm²
440 x 100 x 215mm	20.5	54	1107	2202	1.7	0.059	10.57	20.20	9.88	93.43	6.57	472	220	A1	48
440 x 140 x 215mm	28.5	36	1026	2177	1.72	0.081	10.57	14.81	9.88	93.43	6.57	467	304	A1	51
440 x 100 x 140mm	13.2	72	950	2178	1.68	0.060	16.23	20.20	14.81	91.26	8.74	304	217	A1	48
440 x 140 x 140mm	18.3	56	1025	2147	1.77	0.079	16.23	14.81	14.81	91.26	8.74	300	300	A1	51
Brick 215 x 100 x 65mm	3.0	208	632	2441	1.93	0.034	46.51	59.26	40.40	86.87	13.13	240	156	A1	45
Trench 300 x 140 x 250mm	22.8	36	821	2203	1.68	0.179	23.81	21.51	12.41	90.32	9.68	658	307	A1	52

Fairfaced Dense Block 7.3N/mm²
440 x 100 x 215mm	21.9	54	1183	2353	1.72	0.058	10.57	20.20	9.88	93.43	6.57	502	234	A1	49
440 x 140 x 215mm	27.8	36	1001	2123	1.72	0.081	10.57	14.81	9.88	93.43	6.57	456	297	A1	51

High Crush Dense Block 10.4N/mm²
440 x 100 x 215mm	21.4	54	1156	2299	1.87	0.053	10.57	20.20	9.88	93.43	6.57	491	229	A1	51
440 x 140 x 215mm	31.2	36	1123	2383	1.88	0.074	10.57	14.81	9.88	93.43	6.57	508	331	A1	55

High Crush Dense Block 22.5N/mm²
440 x 100 x 215mm	22.3	54	1204	2396	1.86	0.054	10.57	20.20	9.88	93.43	6.57	511	238	A1	49
440 x 140 x 215mm	30.4	36	1094	2322	1.82	0.077	10.57	14.81	9.88	93.43	6.57	496	323	A1	52

Lightweight Block 7.3N/mm²
440 x 100 x 215mm	14.4	54	778	1547	0.63	0.159	10.57	20.20	9.88	93.43	6.57	340	158	A1	45
440 x 140 x 215mm	19.8	36	713	1512	0.63	0.222	10.57	14.81	9.88	93.43	6.57	333	217	A1	48

MC = Moisture Content
W/m.K = Thermal Conductivity
m² K/W = Thermal Resistance
Kg/m³ = Kilogrammes per Cubic Metre
Kg/m² = Kilogrammes per Square Metre

This data and information is for guidance purposes only. No responsibility will be accepted for any incorrect interpretation and / or use of the data and information contained within this table.

Updated: February 2023