In construction, expansion joints mean deliberately created gaps between two buildings or structural elements. Separated parts work more efficiently and have freedom of deformation. However, expansion joints require filling. A special building material is used for this task (and not only for this purpose) - expansion tape . Made of polyethylene foam, it is strong and resistant to chemicals used in construction, and at the same time flexible, soft, light and easy to use.
Check out expansion tapes at the Onninen wholesaler
How to choose the thickness of the expansion tape?
Depending on the requirements of a specific implementation and the type of heating in the room, the appropriate thickness of the expansion joint tape should be selected. In the case of underfloor heating, the thickness is calculated according to a special formula: D = ΔT × α × L ÷ P, where D is the thickness of the expansion joint tape. However, regardless of the result obtained, the tape thickness should not be less than 8 mm. However, in interiors without underfloor heating, the optimal thickness is the standard 8 mm.
When is it worth using edge tape?
Expansion tape (also known as expansion foam) is widely used in construction and renovation and finishing works. It is used to fill expansion joints when making screeds, floors, panels, walls, surfaces, etc. It is used not only in buildings, but also outdoors - in underground passages, tunnels, bridges and roads. It reduces stress, limits air permeability and prevents the growth of microorganisms. It has a protective, cushioning and filling function. It works well as acoustic and thermal insulation under floor panels.
The product is also used to create edge expansion joints on floors, hence the alternative name: " edge tape ". The screed naturally increases in volume as it dries, which could crack the wall or damage the screed itself. The edge expansion tape protects the circumferential floor surfaces. Prevents the consequences of thermal expansion and swelling of materials. Reduces the risk of cracking and heat loss. It is necessary when preparing flooring. It allows you to demarcate heating zones, prevents heat loss and provides acoustic insulation.
In addition to the popular product made of foamed polyethylene (PE), there is also an edge tape made of polyvinyl chloride (PVC), which is used to seal gaps in concrete and reinforced concrete structures. Additionally, it creates a barrier to water. The edge tape is very simple and convenient to use, especially in the self-adhesive version. There are various widths, thicknesses (usually 8 or 10 mm) and lengths (e.g. 50 m) to choose from. When purchasing edge tape, be sure to check the thickness of the floor.
Advantages and applications of expansion joint profiles
Expansion joint profiles are used to divide heating zones for underfloor heating. They prevent cracking of the screed and finishing layer. The expansion profile allows for the free expansion of floors in rooms and is an important decorative element of the interior. Effectively masks unsightly joints and possible unevenness. Equipped with adhesive tape, it facilitates installation to the surface. Plastic expansion joint profiles are particularly popular.