Rain cladding is a water-dispersing layer placed over existing walls and roofs to improve water-shedding properties and insulation. It’s installed by attaching a frame and a new outer layer, creating a gap that acts as a buffer between the inside and outside. This allows for quicker drying and better insulation.
Rain cladding is a layer of water dispersing material placed over existing walls and roofs. This cladding becomes the new outer skin of a building and is placed directly on top of the old outer skin. This two-layer design improves the water-shedding properties of the building and allows the insulation to work more effectively. Rain cladding is commonly used on older buildings that are made of materials that are less weatherproof and have had more time to develop leaks.
Coating is any process in which one material is covered by another. In many cases the coated material is a finished surface and the coating is intended as a protective layer. This is the case with rain cladding: the exterior walls of a building, or the roof of the building, are covered in a layer designed solely to shed water before it touches the original surface.
Installing the rain cover is a pretty straightforward process. First, a frame is attached to the existing exterior surface: this frame is usually made of strips of wood less than an inch thick (about 2 cm). The new outer layer is then attached to this frame, creating a small gap between the two layers. Edges and corners are covered, giving the appearance of a single-ply wall. Window frames and sills are extended to fit the new exterior wall.
The space created when installing the rain cover is very important. Since the cladding layer is not airtight, the air pressure inside the cavity is the same as the pressure outside. This is in contrast to a standard building, where the internal pressure is often different from the external one. Equal pressure won’t pull in the air or give it a reason to escape, which means that water flowing over the building’s surface will do the same.
Since the cavity is filled with air, this has a direct impact on the insulation of the outer wall of the building. Without cladding, as water flows over the building surface, it will attract thermal variations from the walls and roof. If the inside building is hotter than the outside, it draws heat away; if it’s fresher, he’ll steal some. The air-filled opening acts as a natural buffer between the inside and the outside. Since the water no longer touches the building directly, it takes less temperature away.
If water gets into the trim, it’s often less of a problem than if water gets into a standard wall. Because the space allows for airflow, it will dry quickly; the inside walls restrict airflow and will stay wet longer. Also, most liner systems have some method for releasing water rather than trapping it inside. When water enters a home, it often soaks into the insulation, reducing its effectiveness until it dries out.
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