Glass block wall construction

Although similar to the construction of brick masonry wall, the specific characteristics of these glass blocks required special care.

Due to the peculiarity of its nature (glass) and to the arrangement of these blocks, the use of a mortar with special characteristics in terms of adherence to the glass and the capacity to bear the pressure exerted by the great weight of the block is required.

Preliminary analysis

Glass blocks are becoming increasingly used, mainly due to the aesthetic function they fulfill, as they allow different rooms to be insulated, thereby facilitating the entrance of sunlight.

The installation of this type of material must be joined with a mortar that is adhesive and consistent, in order to resolve both the weight of the blocks and the lack of porosity due to its nature.

These types of walls must also be reinforced with some type of structure.

Technical considerations

Due to the nature of the mortar, GECOL Glass is especially indicated in the installation and rejointing of glass blocks, although it can also be used on any type of traditional masonry substrate.

  • For assemblies of average-sized dimensions, these will be fixed to the adjacent wall, introducing horizontal rods in the manner of a structure.
  • In walls with large dimensions, it is advisable to use U-shaped metal profiles.
  • Mix the product with clean water until obtaining a homogeneous paste.
  • Reinforce the partition wall using galvanized steel rods 4 mm in diameter, ensuring that they do not come into contact with the glass.


Partition walls more than 3 m thick will have another rod in each vertical joint.

  • It is advisable to exert pressure on the blocks to obtain adequately reinforce all the elements and avoid hollow areas between the block and the substrate.
  • Remove excess paste and, once hardened, clean with a clean, dry cloth.

Recommended products

Adhesive mortar

Adhesive mortar for glass blocks

Warnings: The data provided by this Constructive Solution were prepared based on standard onsite installation processes. However, we recommend that you consult our Technical Department in the event of any specific circumstance