Lead Roofers in Bristol



The use of lead for roofing in Bristol dates back hundreds of years, and has been used under all sorts of climatic conditions. In addition to being a common roofing material on many buildings erected centuries ago, lead is still widely used on many new and modern buildings around the world. With lead being so malleable, it is commonly specified and used for flashing, weathering and window hoods on roofs.

It can easily be manipulated to fit various multi-curved contours and this can be done on site as required. Its grey-blue colour makes it ideal to blend in with concrete, brick and glass. Architects might specify the utilization of alloys of lead (e.g. antimony or antimony-arsenic) they may specify thinner gauges of sheet lead down to 3 lb. weight without reducing lead is normal advantages. Today, in addition to snow and ice and intense heat and cold, there are the corrosive elements of modern industrial atmospheres to combat (e.g. acid rain).

Thus, lead is a natural material for atmospheric exposure due to its insolubility in sulfuric acid. The practice of using thinner gauge lead sheet for many applications increases the relevance of three basic rules to be followed if lead is to have the long service life that may be expected. These are:

Individual pieces should be limited in size (the thinner the lead, the smaller each piece) so that the natural expansion and contraction is kept to a minimum, and the risk of severe distortion (with attendant danger of fatigue cracking) is thereby avoided.
Fixings must not restrict thermal expansion and contraction, but must provide adequate long-term support to the lead.
Joints must allow for thermal expansion and yet still be weather tight for the position in which they are used.


Lead plays an all-important part in traditional British building. Lead is still invaluable as weather protection for many traditional British buildings. Even when not used as a roof covering, it can be present as a gutter or flashing, or a bridge at awkward junctions between walls and roofs.

Lead roofs and gutters are made by laying sheets of the metal onto timber boards. Jointing details allow the sheets to integrate, producing a weatherproof surface.

Lead sheets come in different weights, given code numbers. Code 7, for example, is used for larger sheets on historic roof repairs. The number indicates the lead is of a thickness to weigh 7lb per square foot.

A thinner code 4 or 5 might be used for flashings.

The weight of the lead has health and safety implications, too. On a roof, lead sheets can only be effectively manouevred by hand.

Lead can survive on a roof for generations, but, as with all roof coverings, some deterioration eventually occurs, mostly at joints and junctions. Over time, with repeated warming and cooling, large sheets of lead have a tendency to 'creep' down a roof slope.

Occasionaly, lead deteriorates from below, not above. Beating Corrosion Condensation is at the heart of the problem, and various measures can be taken to protect newly-laid lead from this corrosive acidity, namely:
Laying the roof in the spring
Applying a chalk emulsion

Patch repair is possible, but requires heat which has, in the past, lead to some disastrous house fires. The National Trust now has a stringent policy on lead burning.

So you need a Lead Roofer in Bristol give us a call.

The Bristol Roofing Company Ltd







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