Preparing the substrate for green walls

In this article, we'll explain what happens before the green panel is attached to the wall. This isn't a particularly Instagrammable step, but it's crucial for the durability and safety of the work.

Let's start with an inspection: we check the type of wall we're dealing with (brick, plasterboard, concrete, old lightweight partition, etc.), and whether there are any cracks, loose plaster, or signs of damp. A vertical wall can't be installed on a peeling wall or thin plasterboard without adequate reinforcement.

An important point is to identify hidden systems and passages: pipes, electrical cables, sockets, and lighting points in the affected area. These should be accessible with quick interventions, and identifying them, what to do to avoid them, and how to organize cable runs if the green wall includes integrated lighting (LED strips, spotlights, wall washers) is an integral part of the design.

We then tackle the actual preparation of the substrate: in the case of uneven or very imperfect walls, we consider using support panels (e.g., MDF, OSB, or other suitable materials) mechanically fixed to the wall. This provides a flat, stable surface with secure anchoring.

Let's also talk about treatments for damp and mold: if the wall has had problems in the past, it's important to address them first, as moisture hidden behind a closed covering can make the situation worse. It's not about covering a defect with greenery, but rather addressing it first with the right products and only then installing the vertical wall.

We conclude with a simple checklist: a healthy and stable wall, any cracks repaired, utilities mapped, a defined mounting plan (direct or paneled), and any electrical wiring already installed. A successful green wall always starts here, well before the last clump of moss.