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balconies_and_other_ironwork

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Balconies and other Ornamental Ironwork

The importance of regular checking and how to do it

Balconies are a very important feature of Georgian designs, and add to the overall character of a historic area, and are extremely important in Hamilton Square and surrounding area.

It is important that these are well maintained as they provide the embellishment of the building. Being made of cast or wrought iron, they also need careful maintenance to protect them from rust. Because of the loads they may carry, it is particularly important that balconies be securely fixed to sound stonework, and treated against rust.

In some cases, a heavier balcony is supported on a bracket of cast or wrought iron of various designs. The base and wrought-iron coping rail of the balcony itself are usually built into the wall.

Balconies running the length of a street are tied back to the stonework with wrought- or cast-iron bars at the party walls; these ties sometimes take the form of decorative cast-iron panels fixed across the balcony to separate adjoining houses.

When to do checking

All ironwork should be inspected annually for any signs of breakdown and decay.

All ironwork will need repainting:

  • at the first signs of rust
  • about once every five years. South or West facing exposures may need repainting more frequently.

Re-painting should using the principles of thorough painting laid out in Birkenhead Heritage Advice External Paintwork.[SEE LINK]

What to look for

Balconies, usually fitted to drawing-room windows on the first floor, contribute greatly to the decorative quality of Georgian facades. There are four basic types:

  1. A long balcony running the length of a house or street (e.g in Hamilton Square);
  2. A curved or rectangular balcony, the width of an individual window (e.g. in Hamilton Street);
  3. A shallow guard, the width of an individual window, often found on rear elevations and at nursery windows on upper floors;

Each type can be found in a variety of different patterns, but there are common patterns for Birkenhead, which should be used when replacing balconies.

Balconies usually rest on the projecting string course at first-floor level, being fixed to the stonework with lugs which form part of the floor grid, staved into undercut holes.

Mostly the bracket is wrought-iron, fixed at top with lug set in lead, fixed at bottom by bolts grouted into masonry.

Cast iron is particularly brittle and will readily fracture if subjected to tensile stresses or if the section is significantly reduced by corrosion.

The grid floor panels of continuous balconies need to accommodate a certain degree of thermal and structural movement; welding in situ can restrict movement and cause further cracks.

Water penetration may occur if fixings have been realigned on the wall face, leaving sinkings in the stonework. These should be made good with a mortar repair.

What to do if you find a problem

Avoiding creating problems

Historical background

balconies_and_other_ironwork.1616746748.txt.gz · Last modified: 2021/03/26 09:19 by mark