Repair of old wooden house foundation
One glance at the old wooden buildingYou can judge the need for repair work of its foundation. What signs indicate the presence of problems in the construction of the house foundation? This structure may be skewed, partial or total subsidence of the building, the occurrence of cracks on walls, on the base and other deformations. The reason for these phenomena lies in the seasonal temperature changes and frost heave and destruction of the materials from which the foundation was carried out under the influence of time. Depending on the severity of the situation, a decision on what repairs the foundation of an old wooden house spending - partial or overhaul.
- Repair of the foundation and its types
- Strengthening the old base
- Replacing dilapidated foundations
- The uneven bulging foundations
- Step by step replacement of worn pier foundation
Repair of the foundation and its types
If the base of the wooden buildings went into the ground,thus remained intact enough to perform partial repairs. The design of a little rotted foundation, made of wood, it should be replaced or strengthened. This building rises to the desired height, the base built up by a concrete block or brick.
Overhaul of the wooden house foundationIt is carried out if it is destroyed and cracking. It is necessary to take into account the availability of features in the terrain, the basics of depth, the soil type. Also, when selecting the optimal technology of repair of the old wooden house foundation pay attention to the original design of the base.
If it is made as a continuous footing, the partial dismantling of the variant amplification and around the perimeter. Complete replacement is carried out in case of a large degree of destruction.
If the structure is on the pier foundation, thefor repair in most cases it requires a complete replacement of poles. At the same time the construction of carefully raised to the required height, using jacks. On reinforced concrete pad set a new pole durable. Likewise, the installation is carried out in the other pillars of the foundation design.
Strengthening the old base
1. Begin repair the old house foundationHaving damage around the perimeter, with trenching around its construction.
2. The surface of the foundation and the walls cleaned thoroughly from adhering dirt and old plaster.
3. Stepping back a certain distance from the wall, fix the metal mesh with anchors fired from the basement and plinth.
4. Set the formwork, concrete is poured.
5. After enduring the time required for the concrete mix hardens, the trench is filled. In addition, each layer is reinforced compaction.
If the destruction suffered only one individualland, the foundation for building up the sides of the laying of the stones to the required width. At the same time provide a link between the clutches of old and new design. The sole foundation at the same time, as a rule, does not go. In identifying the weak areas of the base of the house, made of rubble, rubble concrete, soil-concrete, reinforced concrete and other materials, made of reinforced concrete broadened clip. Her carefully linked through anchoring to the existing masonry. This ensures that a joint "work" re-arranged plot with the old part of the foundation structure.
Also increase the load-bearing capacity of the oldbase, spreading along the weak areas on both sides of the new foundation, which supports the load on the severity of the house through the metal or reinforced concrete beams that pass through the basement of. Also, be sure to spend anchoring the old and new structures for the integration of their power.
Replacing dilapidated foundations
Those who came in full construction disrepairshould be replaced with new ones. Repair of an old foundation in this case is considered inefficient and costly. The work begins with a partial or full discharge of the old who have served their time, the foundation.
At the same time builders task it is to ensure the stability of the house and the preservation of all structures located above. There are several ways, namely:
- installation of temporary wooden "seats" on the sleepers located cross;
- device under the walls of stone pillars, the transmission load from the slab on the ground (in particular require careful strengthening of window and door openings).
Also, use braces, which supportplinth wall, transferring the load from the wall at an angle to the ground. Before starting work on the foundation of summarizing the wall fixed reference beacons by which tracked easily possible deformations. Following the preparatory work dug pit. Laying the foundation spend two-meter sections between which make breaks in size from 2 to 4 meters. Taken into account the order of reference works.
The wooden houses are usually fully dischargedold foundations, "posting" of the wall. Under them is fed laterally positioned reinforced concrete or steel beams, laid in a specially punched holes at a distance of 2.0-2.5 m. These beams rely on temporary supports, pre-set builders. Is replacing the old foundation of the new, while its base is located below.
The uneven bulging foundations
Foundations of wooden houses that were built onthe former peat workings, forested areas with loamy, clay and grussy soils, tend to experience uneven bulging. These processes begin with the south side of the structure, because the thawing soil there faster. Therefore, in these areas the soil layers much moistened. Brick foundations, even reinforced, covers a multitude of cracks dividing the structure into separate blocks that are destroyed rapidly in the future.
Concrete foundations are also susceptible to damage,but the processes are somewhat slower than in the brick structures. First cracks length of 20-30 cm in the vertical plane. Further there is a bulging of the destroyed parts of the foundation, and it may already threaten the safety of the house. Stronger than all considered concrete structures in which bulging is less pronounced due to the valve accepting the part of the stress of the soil pressure.
Step by step replacement of worn pier foundation
Old pier foundation, located in the ground saturated with water, it is best to replace the small recessed design. The technology is divided into several steps:
1. The removal of topsoil;
2. excavation to the required depth, the presence of old - spend its draining and consolidation;
3. The device sand pillows;
4. laying concrete or concrete belt, which is mounted on metal pipes with diameter 100-250 mm;
5. laying pipes over concrete or metal base plates, and spend bonding anchors of these elements. This makes it possible to prevent a shift of the upper plate.
Before the construction of foundations in difficultsoils need to take effective measures for the drainage of the house. These include the removal of the eaves of 0.5 m, the device of trays or gutters, ditches or drainage device wells.
It often happens that the repair is necessarynot only worn out foundations, but also destroyed as a result of errors builders base. In any case, significantly cheaper to build a new foundation for lasting than re-build the house.
When replacing all or some of its foundationparts necessary to perform preliminary calculations, which takes into account all the old and new load. This takes into account physical and mechanical properties of the local soil.