How to raise the foundation

Of all the components of the residential building, the foundation is most quickly destroyed. Especially if this is accompanied by the increased humidity of the Earth, the close arrangement of groundwater or uneven soil density. We will look at raising the foundation for the house of the tree.

Before starting work on raising the foundation, all the necessary materials should be prepared for this. The number of building materials and special equipment is determined depending on the total area of \u200b\u200bthe house. We will need:

Sand, crushed stone and cement - for the preparation of concrete.
Boards in order to create a formwork.
Steel fittings for the reliability and durability of the base.
Hydraulic or mechanical jacks whose lifting capacity should be from five tons.

The next step is to rise a wooden log cabin and installing jacks under it. This is a laborious process, and alone you can not cope. Raising the house begins with the execution of such procedures:

On the perimeter of the foundation, there are trenches along two opposite walls, which are broken completely.
Next, choose recesses for the installation of jacks.

The jacks must be installed on a strong and reliable basis to avoid sump skew and ensure their own safety while lifting and sagging the house for the period of work. For these purposes, railway sleepers are perfectly suitable: to lay the metal plate between the log and jack - watch the rod not slipped. It is not recommended to put a jack on concrete slabs - they can burst under the pressure of the weight of the structure. The lowest log of logs, of which the house is folded, can be removed, and the next log before formulation for the foundation is impregnated with an antiseptic. Or disassemble the floor and prepare fresh processed bars to replace old logged logs at the base.

Before lifting the house for repair work, it is necessary to strengthen the log house, tied with each other all the crowns by a vertical tie so as not to destroy the walls in the process of work. Raising the structure is performed in such a session:

Summing up the jacks under the corners of the house, preference is given to hydraulic mechanisms. We start working from the very axial corner of the house.
Raise should be performed evenly and simultaneously from all sides. At one time it is allowed to increase the height of no more than 2 cm, otherwise the building can fall on the side.
We raise the house on the one hand, fix the bars of a large cross section, laying out their cross on the cross. Then go to the other side, we carry out the raising there. We do not rush, carefully observe the general state of the structure.
Performing work, it is important to monitor the integrity of the walls - if you have found the slightest damage, it is necessary to stop the installation and increase the number of binding crowns between the logs.
If the house is small, then it is enough to raise the corners of the structure, otherwise it will also be necessary to raise the walls so as not to provoke their destruction or deflection.
You can start work on the installation of a new foundation after you securely fix the log house on the backups, without deleting the jacks.

The next step is to restore the base, pour the support poles at the corners of the house. To do this, perform such actions:

We dismantle parts of the old support.
We deepen the trench for the foundation for the desired value, which is determined by the calculation - it must be necessarily below the level of the primer of the soil.
We make 10-20 cm thick pillow of rubble or sand.
Link the frame of the reinforcement, before lifting the building and the fill of the foundation, it is recommended to study the features of reinforcement. By performing installation, reinforcement releases do not leave for a bundle with other frame elements.
We install and fix the formwork well.
To increase the strength of the foundation, we try to fulfill the fill at a time.
A mixture of concrete is recommended to be tamped with a special vibration tool.
First of all, we fill cement supports at the corners of the house to reduce the time of provisions of the structure. After the installation is completed on the surface of the foundation, several layers of rubberoid are placed in order to waterproofing.
The house is lowered by performing the same actions as during the rise, only in the reverse order - weaken the jacks and remove the safety substrate.

When picked up the foundation, it is recommended to perform work at a slow pace, carefully controlling the whole process, and otherwise you can achieve a skew of the building or the appearance of cracks on the walls.