Historic Walls and Ivy
- Published: 26 January 2017 26 January 2017
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External vegetation can enhance the appearance and character of historic buildings, but certain species can cause direct and indirect damage to materials and elements of the construction.
One species of external vegetation is ivy and it has both bad and good points; it can push between voids in the wall causing displacement of bricks and stones, but if a wall is collapsing ivy can help to hold it up until it is repaired.
Suckers and tendrils can cause damage to surface features and leave a pattern of marks when removed.
Rainwater goods may become blocked and extensive growth can force gutters and other fixtures away from the walls.
Extensive growth will give a shading effect and this may also reduce moisture evaporation from wall surfaces, causing damp issues.
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