The chimney is an essential part of the ventilation system, whose effectiveness determines the safety and comfort of residents of the house. The necessity of professional performance of the chimney due to the construction standards, which specify, inter alia, its basic parameters and location in the whole structure of the building.

The rules of the trade also characterized in detail acceptable materials and how to build the chimney. Even reliable performance by a roofer working chimney will not prevent it from leaking when we decide on the use of inappropriate materials or ignore the principle of proper pointing. There is no doubt about the fact that the material most commonly used for the construction of  chimneys is ceramic brick. But it is worth noting that not all of its kind in this case is suitable. To ensure optimal tightness and prevent it from leaking, the chimney should be lay bricks from solid brick along its entire length, also in the part above the plane of the roof.

A common mistake by masons is to use complete bricks only in the lower layers, or the overall design of the chimney form cavity bricks. Such solutions may cause the rain water will penetrate under the roofing, causing dampness and to reduce the thermal insulation properties.

Another principle that must be taken into account when you are building the chimney is appropriate pointing. First of all joints should be complete, tightly filling the space between the bricks. There is no incentive laying bricks on empty or recessed joints, because in unfilled places water accumulates, weakening the durability of the chimney. It is also important appropriate arrangement of bricks. The individual layers should form a so-called bond of bricks in which the vertical joints are offset by half a brick length. In summary, the use of full bricks, filling tight joints and  bond of bricks it is the basic principles of construction of the chimney, effectively avoiding the problem of leakage.