Project Highlights
Northway completed remedial damp proofing works to an external curved bay window wall in Shipley, Bradford, where elevated pavement levels were creating a risk of lateral moisture penetration into the property. A cavity drain membrane and perimeter drainage channel were installed to manage moisture and protect the internal wall fabric.
Elevated external ground levels identified as a moisture risk to the bay wall
Curved bay wall geometry required careful installation and detailing
3mm mesh-faced cavity drain membrane installed to the affected wall
Perimeter drainage channel fitted to intercept and manage lateral moisture movement
Project Overview
Northway completed remedial damp proofing works at a residential property in Shipley, Bradford.
The works were carried out by Northway technician Steve and focused on an external curved bay window wall affected by elevated external ground levels from an adjacent pavement.
Where external ground levels sit above the internal floor line, lateral penetration of ground moisture can become a significant risk. This can affect both the structural fabric and the internal environment of the property if not managed correctly.
The Issue
The affected wall was located beside an adjacent pavement where the external ground level exceeded the line of the internal floor.
This created a risk of moisture migrating laterally through the wall structure. In this case, the curved geometry of the bay window wall added an additional technical consideration, as the damp proofing system needed to be installed carefully to suit the shape and detailing of the wall.
Works Carried Out
Northway installed a 3mm mesh-faced cavity drain membrane to the affected curved bay wall. This was coupled with a perimeter drainage channel designed to intercept and manage moisture moving laterally through the structure as a result of the elevated pavement levels.
Works included:
- Assessment of the affected curved bay window wall
- Identification of elevated external ground levels as a lateral moisture risk
- Installation of a 3mm mesh-faced cavity drain membrane
- Installation of a perimeter drainage channel
- Careful detailing around the curved bay wall geometry
- Preparation of the wall system to help manage moisture pressure long-term
Outcome
The installed system helps decouple the internal wall fabric from ground moisture pressure, providing a robust and long-term damp proofing solution for the affected area.
By combining a cavity drain membrane with a perimeter drainage channel, the works help manage moisture movement caused by elevated external ground levels while protecting the internal environment and surrounding building fabric.
