Back to: Styrofoam glue
Styrofoam glue is one of the most important components in the thermal insulation system of buildings, directly responsible for the stability, longevity and energy efficiency of the complete facade.
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Styrofoam glue is not only used to fix panels to the wall, but has a double, key function in the construction of a demit facade:
Gluing layer: The first step involves applying glue to the styrofoam (EPS) board itself. The glue must create a perfect connection (adhesion) between the wall (concrete, brick, giter block) and the insulating material, overcoming all surface irregularities of the substrate.
Reinforcement layer (smoothing): After the Styrofoam is stamped, the same glue (if it is declared as a universal or special reinforcement glue) is applied over the panels in order to press the glass mesh into it. This layer acts as a reinforcement that gives the facade mechanical strength, resistance to impacts (e.g. from hail) and creates an ideally flat base for the final decorative plaster.
Depending on the technology, the speed of work and the specifics of the construction site, craftsmen today use two completely different types of Styrofoam glue:
Polymer-cement (powder) adhesives: The traditional and most widespread solution. They come in 25 kg bags and are mixed with water using a mixer. They are characterized by high strength, vapor permeability and excellent filling of irregularities on old and crooked walls.
Polyurethane foam adhesives (PU adhesives): A modern solution that comes in bottles and is applied with a dedicated foam gun. PU glue dries extremely quickly (doweling is possible already after two hours), has additional thermal insulation properties and drastically facilitates transportation because one small bottle replaces the entire 25 kg bag of classic glue. However, it requires ideally flat walls because it has less power to fill large holes.