Perimeter walls: what to know before you build
A boundary wall is often the first thing built on a plot. Foundations, columns, height and drainage: what makes a perimeter wall last.
By Redbay Group ·
Confirm the boundary first
Before any digging, make sure you know exactly where your boundary is. A surveyor can re-establish the beacons. A wall built on the wrong line is expensive to move and can lead to disputes with neighbours.
The foundation matters most
Most failed boundary walls fail at the bottom. A proper wall sits on a trench footing, with a stone or concrete base and a damp-proof layer before the walling starts. Skipping these to save money is the most common mistake.
Columns and height
Long walls need reinforced concrete columns at regular intervals to keep them straight and stable. The taller the wall, the stronger the foundation and columns must be. Very tall walls should be checked by an engineer.
Plan for water
Water is a wall's main enemy. Make sure the design includes:
- Weep holes or gaps so water does not pond behind the wall
- A coping on top to shed rain
- Drainage along the base where water flows across the plot
Think about the gate early
Decide the gate size and type before the wall goes up, so the gate columns are built strong enough to carry it.