01. Services

Bricking up external walls begins from the corners. Depending on the type of hollow blocks intended for single-walled walls, the corner can be made only from the full size element or from supplemental elements: half-pieces and corner pieces. We must remember about laying mortar on the lateral surface of the hollow block, laid in quoin to the blocks’ front-end surface, that are laid perpendicularly. After laying them we must check the level of the layer and, if needed, slightly drives them in using rubber hammer.

 At each corner it is best to lay a minimum of three layers of hollow blocks before filling the sections of the walls between them. This is referred to as “pulling corners”. The blocks in the corners must be arranged alternately. We must make sure we achieve the same level of successive layers of hollow blocks in all corners.
The vertical wall inspection should be carried out using a spirit level, after laying each layer of hollow blocks in the corner. The control of the horizontal arrangement of hollow blocks between the corners, will allow to stretch the masonry. When bricklaying a masonry cord that spans between the finished corners is very useful. It facilitates the preservation of one level for all hollow blocks laid in a layer. The setting of the airbrush adapts to the height of the twine and other hollows, using a rubber hammer.

The hollow blocks are laid in successive layers to ensure that they are properly tied. The vertical joints in the adjacent layers must not overlap, but must be offset by at least 0.4 hu (where hu is the height of the air brick), ie by 10 cm. As far as possible, it is advisable to perform a tie by moving half the brick in two adjacent layers of the wall. In the case of a wall of non-modular length (ie different from n x 12.5 cm) it is necessary to use complementary elements in the form of cut blocks, which disturb the regular tie in the wall and cause less than 10 cm tie.

02.Services 

 The attachment of the complementary masonry element must not, however, be less than 4 cm. Such relationships should not overlap in successive layers. Slabs should be laid as far as possible in the middle of the wall rather than at the edges. Possible voids of blocks in monolayer walls should be refilled before plastering with heat-resistant mortar or thermal insulation mortar.

When installing single layer walls in standard system, same as in other technologies, a specific installation recommendation is applicable. Compliance with them is a guarantee of the use of all the advantages of this technology, including efficient and fast execution. When preparing the wall, let us choose the elements larger than traditional hollow blocks, that will allow for much faster execution of a given scope of works. To make it easier we can use Porotherm hollow blocks that do not need mortar in vertical joints. Prior to beginning of works we check the levels in all corners in the building. For this it is advisable to place patches allowing to mark our levels. Horizontal dampness protection will protect walls against moisture ingress. It is placed on a foundation (or basement) wall under the first layer of Porotherm or other brick. It is best to make the insulation from a special film or felt, laid with strips of at least 10 cemtimetres.