Lead Sheet provides a lasting protection for a wide range of roofing applications. It is the professional’s choice for flashings, valley gutters, porches and dormers on residential property and can be the focal point for both traditional and contemporary buildings. However, not all Lead Sheet in the UK is manufactured to the same specification.
Only Rolled Lead Sheet achieves the British Standard BS EN 12588 for thickness consistency. The rolling process involves passing slabs of Lead back and forth between high pressured rollers. The process is computer controlled to consistently obtain an exact predetermined thickness and knitted grain structure, allowing the performance of the product to be accurately predicted whilst in situ.
A range of standard thicknesses with a tolerance of +/- 5%;
The alloy used conforms to quality of not less than 99.81% Lead;
Lead is produced to six standard Code thicknesses, The Code numbers were derived from the imperial weight of a piece of the Lead measuring 1 square foot. For example, Code 3 weighed 3lb per square foot. With the introduction of the British Standard, the emphasis changed to the thickness rather than its weight per area.
The maximum size recommended for each thickness or Code of Lead varies; the thicker the Lead the larger the piece that can be laid.
To calculate the approximate weight of Rolled Lead Sheet, multiply the length in metres x width in metres x by the Code weight in kg/m2.
A roll of Code 5 x 6m x 480mm = 6.0 x 0.48 = 2.88 m2.
Code 5 is 25.4 kg per m2
25.4 kg x 2.88 m2 = 73.152 kg, approximately 73 kg
You can save on cutting charges by ordering a standard length and cutting it yourself.
If the width you require is not available at your local BLM stockist, it is worth ordering a wider piece to avoid delay.
Large orders can be delivered direct to site at no extra cost.
At BLM, we always aim at a quality of not less than 99.93% Lead in the alloy used for producing our Rolled Lead Sheet, which comes backed with a 50 year warranty providing it is installed in accordance with the LSTA's Rolled Lead Sheet Manual and BS 6915.
We supply Rolled Lead Sheet in any width from 150mm to 1580mm in Codes 3,4 and 5 and up to 1275mm in Codes 6,7 and 8 in standard roll lengths of 3 and 6 metres. Extra charges and extended lead times apply for non-standard lengths and thicknesses.
The maximum size recommended for each code thickness varies: the thicker the Lead the larger the piece that can be laid. The sizing chart below provides details of the maximum recommended sizes of Rolled Lead Sheet for a range of common applications.