Glue Styrofoam to chipboard or OSB

Coarse chipboard, better known as OSB, consists of glued and pressed wood fibers. They are used inside and outside as planking and cladding. With assembly adhesive, Styrofoam can be glued to the top or bottom for insulation. The contained glue reduces the absorbency compared to pure wood.

Note the OSB material class

OSB panels are used to clad facades, sub-roofs, walls and floors. Walls of prefabricated houses in post construction can consist of the significantly cheaper material instead of real wood. OSB can be plastered and covered with insulating material. When gluing, the building authority approval of the adhesive must be guaranteed.

  • Also read - Gluing and connecting Styrofoam to Styrofoam
  • Also read - Gluing styrofoam to laid tiles
  • Read also - Gluing a Styrofoam insulation

When selecting the adhesive, it is important to ensure that it is suitable for the respective class of OSB panels. The insulation material must also belong to formaldehyde class E1 in Germany. The poor drilling properties of Styrofoam hardly allow an insulating, tight and durable fastening. In addition, it is not necessary due to the low weight of Styrofoam.

Common adhesive based on polyurethane

In contrast to gluing on wood, OSB has a more frugal surface with less absorbency. The most effective and widely used adhesive is made on the basis of polyurethane (PU). It is available in a paintable form and as a foam.

Gluing is possible both as a cladding of the styrofoam and to attach styrofoam panels as insulation on the OSB. When it comes to the question of what Styrofoam is glued with, the following adhesives come into question:

  • Polyurethane foam
  • Polyurethane assembly adhesive
  • Organic dispersion adhesive for outdoor use

The similarity of the basic material wood has led to the fact that adhesives that are designed for fastening styrofoam panels to wood can also be approved for unsanded OSB surfaces.

Additional insulation aid

Adhesive foams made of polyurethane can also be used with their own additional insulating effect. The most powerful products achieve a thermal insulation value of less than 0.03 watts per square meter Kelvin (W / m²K). Styrofoam with a thickness of ten centimeters has an insulation value of 0.035 W / m²K. The adhesive foam also has a filling effect, especially at corners, joints and in cavities. Thermal bridges are simply interrupted in every installation situation.

Tips & Tricks When using PU adhesive foams that you use on OSB as floor panels, make sure that the products are designed for the impact load.