Wall overcladding or full replacement?

Consider wall overcladding when the structure and retained layers can support a suitable new system and its details can be resolved. Consider replacement when the existing wall or supports need substantial repairs, or when retaining layers would leave defects or design risks unresolved. Start with an assessment of the existing elevation and how it connects to the rest of the building.

What the survey needs to establish

• Condition and capacity. Which parts of the wall and frame are sound, and what can carry the new system?
• Water and moisture. Where does rain drain now, and how would the proposed build-up handle drainage and moisture?
• Openings and edges. How will windows, doors, shutters, roof edges and the base of the wall meet the new depth and profile?
• Design responsibilities. Who is responsible for assessing the complete build-up, including structural and fire performance where relevant?

Read the interfaces before choosing the finish

Imagine a wall with a loading door, a window above and a downpipe beside it. An extra layer changes the face of the wall at each of those points. Ask to see how the proposed work finishes at the door, sheds water away from the window and accommodates the downpipe. These details affect the scope as much as the choice of colour or profile.

Our over-cladding project gallery includes photographs of insulation and membrane being installed. Use the gallery to see what sits behind the outer skin and ask which layers your project would retain, add or replace.

Compare the options on the same terms

Ask for a written scope showing existing layers retained, what is removed, how openings are detailed and any periods when parts of the wall will be exposed. Where records or inspection access are limited, ask which assumptions need resolving before the system can be specified and priced.

Reference. Tata Steel UK’s guide to industrial wall overcladding.