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Established 1893   |   BS 460:2002 Certified   |   UK & International Supply   |   Expert Technical Support   |   0333 987 4452

Care and Maintenance of Rainwater Systems for Churches and Ecclesiastical Buildings

Rainwater systems cover a variety of different means of shedding water away from a building. On older church buildings they are most commonly seen as attached cast iron guttering, though they can also be incorporated into the building’s fabric — concealed behind parapets and within walls. Medieval churches used decorative gargoyles and projecting spouts to do this job. Today, churches and ecclesiastical buildings are more commonly fitted with guttering, hoppers, and downpipes.

Cast Iron Gutters and Pipes: Part of the Church’s Architecture

Rainwater systems are often detailed as part of a church’s architecture. On listed church buildings, they form part of the protected structure. Elements of the rainwater system are frequently more ornately decorated — particularly where they have been made in lead or cast iron. Hoppers and leader heads were a favourite place to record dates, which are frequently seen cast into the ironwork of church downpipes.

Water Damage to Church and Religious Buildings

Most forms of deterioration affecting old buildings in the United Kingdom are attributable to excessive moisture. Dampness promotes timber decay, the corrosion of metals, and structural collapse. It mobilises soluble salts that harm masonry and increases frost damage. Damp fabric also reduces thermal efficiency, spoils plasterwork and decorations, and creates conditions harmful to the health of occupants.

If water is not effectively channelled away from the building at ground level, moisture builds up in the surrounding ground. Ground-level water can cause movement and heave, leading to cracks in walls and distortions in doorways and windows. Water can also be drawn up from the foundations as rising damp, causing damage to internal plasterwork and finishes.

Blocked, cracked, or poorly designed rainwater goods can allow water into the walls and roof timbers of a church. The resulting dampness encourages timber decay through fungal attack and insect infestation. In winter months, water can penetrate masonry surfaces and freeze, causing stonework to crumble.

Church Gutters: Fit for Purpose

Climate change is bringing increased rainfall, and older church buildings — which may have been fitted with a variety of different rainwater disposal systems during their lifetime — should not be assumed to be up to the job. A proper assessment of flow rate capacity is advisable as part of any quinquennial inspection or gutter survey.

If a Church is Listed

On a listed church, the rainwater goods form part of the listed structure. This need not be an insurmountable obstacle to replacement if the existing system is inadequate or inappropriate — but any change in material or profile will require Listed Building Consent and should be agreed with the relevant conservation officer in advance.

Church Gutter Inspections

Both lead and traditional cast iron guttering were chosen for their durability as well as their appearance, and when properly maintained can last 100 years or more. Prevention is better than cure. Establishing a regular maintenance routine is the most effective way of ensuring longevity.

Rainwater goods should be surveyed as part of a regular building inspection. Survey recommendations should be followed up promptly where a major fault is identified. Not all rainwater goods are accessible during a standard inspection — harder-to-reach areas should also be included at regular intervals. Gutters and pipes should be inspected and cleared at least twice a year, with autumn (after leaf fall) being the most important time.

What Prevents Church Gutters and Pipes from Working Effectively

In autumn, leaves can block gutters within days. Because of their open setting and community use, church gutters also collect stray balls, cans, plastic bags, and dead birds or small mammals. Due to the age of most church buildings, fragments of tile, slate, and fallen stonework can also build up. Plants can establish in the gutter after a build-up of silt.

Cast iron gutters and downpipes can corrode and crack, allowing water to escape into the building. Damage can also occur when ladders are leaned against gutters, and downpipes are vulnerable to vandalism. Older joints between pipes can allow water to seep out. Below-surface drains — often Victorian ceramic — are susceptible to damage by ground movement, heavy vehicles, or tree roots. A blocked surface water drain can back up the entire system.

Detecting Signs of Problems in the Rainwater System

Outside: Trees close to the church require extra vigilance. Look for rust staining on external walls near cast iron downpipes, signs of green algae near drainpipes, and gutter overflow during heavy rain.

Inside: Areas of painted plaster changing colour or looking patchy; signs of dampness high on a wall (most likely related to gutters); dampness lower down the walls below two metres (more likely related to underground drains).

Metal Theft of Rainwater Systems from Churches

Lead, copper, and cast iron drainpipes are potential targets for thieves. When replacing stolen metalwork, it is assumed that replacement will be like-for-like. Action to discourage future theft should also be considered at the same time.

Repairs to Church Gutter Systems

Repairs to rainwater goods are expected to be carried out like-for-like — that is, adhering to the design and materials of the existing system. This is especially important on listed churches.

The cost of lead and cast iron rainwater systems can be significant. Depending on the overall condition of the system — which should be assessed by a qualified surveyor or specialist — removal and repair or targeted replacement of certain sections could be an option. Full replacement of one complete elevation is another.

Tuscan Foundry can offer bespoke cast iron gutters and pipes to exactly match the original. Where costs are prohibitive, we can offer a match from our range of 48 profiles. We have supplied cast iron rainwater systems for churches throughout the UK and can offer technical advice on all aspects of cast iron repair and restoration for ecclesiastical buildings. Contact us on 0333 987 4452 or visit tuscanfoundry.com.

Tagged cast iron guttering, church buildings, ecclesiastical buildings, gutter maintenance, heritage buildings, listed buildings, rainwater system
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