3. Choosing a Seal
If you want to save energy costs with the installation of a new balcony or patio door, choosing the right type of sealing material is very important. There are three different sealing levels:
a) Inner Seal Level
The inner sealing level separates the inside from the outside climate. The seal has to be vapour diffusion resistant, ensuring reliable climate separation and stopping the diffusion of water vapour through the door. Usually, you can use vapour resistant foil or acrylic jointing for installation.
b) Middle Seal Level
The main space between masonry and the patio door frame is called the middle sealing level. To provide good thermal insulation, it is essential to completely fill these gaps with insulating materials. Most common is the use of polyurethane construction foam. Other filling material, such as cotton fibre and mineral fibre materials, are alternative solutions. People suffering from allergies may want to be careful in their choice of insulating material, as polyurethane may cause allergic reactions. The use of other filling materials is more sensible in such cases.
c) Outer Seal Level
The outer sealing level provides the profile of the new patio door with long-term protection from weather influences. In accordance to ISO standards, the installation must be heavy rain proof and open to vapour diffusion simultaneously. Foils and pre-compressed sealing tapes can meet these requirements quite easily. Sealing the joints with silicon is also possible.
Proper seals not only ensure good thermal insulation, they also protect the actual masonry from atmospheric influences in the long term. Once you have chosen the appropriate sealing materials for the different levels, you can easily order them in the windows24.com accessories shop.