How to make a foundation for an extension to the house with your own hands?

If you have a suburban real estate in your possession, you probably for once thought about how to increase living space. There is not always the financial capacity and the strength to acquire a new house or build it anew, the output may be an increase in the area of an existing building. In any such construction, the most important stage is the creation of a quality foundation for an extension.

Design Features

If you have pondered the question of how to make a foundation for an extension to your home, you should listen to the opinion of specialists who advise to form the basis of the same construction as the foundation of the main building. This is due to the fact that different foundations can interact with the soil in their own way, which can cause different shrinkage. Therefore do not save and build reliable identical foundations. Before you make a foundation for an extension to your home, you must choose one of the three existing ways of connecting the grounds. The first involves the formation of a monolithic foundation, which will be connected by a metal thick reinforcement. The second method involves the construction of independent bases from each other, between which a deformation seam will be located . The third technology is a pile-screw foundation. Before pouring the foundation, it is necessary to take into account the gravity of the extension and what characteristics the ground has.

A solid foundation is excellent for building, which was operated for several years, and due to uniform soil did not shrink. Otherwise, it is recommended to make a separate foundation by combining it with the base by means of a deformation seam. Regardless of which way of creating the foundation was chosen, it should be cut exactly as far as the base of the main house was buried. Sometimes the foundation is somewhat higher, given the shrinkage.

The foundation for rigid reinforcement

If you are faced with the task of making a foundation for an extension to your home, you can create a foundation for hard reinforcement, which is suitable for an established home. Shrinkage of the latter at the time of commencement of construction work must be completed. Such a design is not suitable for cloddy soils.

Methods of work

Initially, it is necessary to measure the depth and dimensions of the old base, only after you can begin to prepare the trench. Its depth should not be greater than the depth of the basement. In the old base, holes with a diameter slightly larger than the diameter of the reinforcement are made. The depth of the holes should be determined by the following formula: for this, the diameter of the reinforcement should be multiplied by 35. If for the hole the width of the base is not enough, then the reinforcement must be clogged, for this purpose a longitudinal cut is made on the end face, and then the riving inserts are installed. This technique of fixing the armature is quite reliable.

Working with fittings

If you are thinking about how to make a foundation for an extension to the house of brick, then the above method is perfect. To do this, calculate the number of rods. For a closed loop of a new design, about 20 elements per square meter of the foundation are most often required. The components are cut by an angle grinder or with an abrasive machine. If we are talking about an open loop, then the number of reinforcing bars can be determined individually, depending on the width of the future foundation. In the drilled holes should be installed rods, but before they are welded to their ends washers.

Quite often, home masters are interested in how to make a foundation for an extension to the house. The increase in the room will allow this. By the way about the above, it should be noted that further actions provide for the creation of formwork, which fits the fittings. The resulting space is poured with concrete. Then the solution is left until completely solidified, after which the master can start construction work.

The cases of the use of rigid jointing of foundations

Rigid docking is used when the annex is combined with a common roof with the main building, and also with a strip foundation. This method of connecting the bases is also used when the building is installed on a columnar foundation, and the fixing is carried out on the base. This indicates that this element must have the required height and width. Rigid mating of two structural elements can be used in the presence of a shallow foundation of the tape type when it enters a single monolithic type system.

Formation of a separate foundation

Before making a foundation for an extension to the house from the timber, it is necessary to take into account that the most popular and simple way is to erect a separate foundation. In this case, the foundation will be located fairly close to the main building, and between the structures should be installed deformation seam. The function of the layer is to protect the structure from deformation and the formation of cracks in the shrinkage process. To form a seam, it is necessary to apply a moisture-resistant thermal insulation material, a patella or roofing material. Given that the structure will still be seated, the foundation should be laid above the finished one.

Technology of work

If you are thinking about how to make a foundation for an extension to your home, a photo is recommended to consider in advance. They will allow you to understand which technology is best to carry out the work. The gap between the new and the old base in the formation of a separate foundation should be 5 centimeters. Before the beginning of concreting, planks covered with a layer of waterproofing are applied to the finished base. In the future, these elements will serve as a deformation seam. If there is a small extension to one floor, there will be enough seam, the thickness of which is 2 centimeters. Filling of the received space can be carried out by a heat-insulating material, in which quality penoplex or polystyrene often acts. A close gap can be a sealant that is resistant to the effects of weathering. Outside, everything can be masked with a decorative cover.

The foundation for a house extension from blocks can just be created using this technology, since it is the most acceptable.

Creating a columnar foundation

If the extension is supposed to be formed from light materials by type of wood, then an inexpensive foundation on the pillars will be the best option. If the dimensions are limited to 7x3 meters, then it is enough to prepare 6 pillars. In the soil it will be necessary to drill a well, deepening below the freezing level of the soil. The sand cushion is laid on the bottom, the fiberglass reinforcement is installed, and then the formwork is of the required size. The resulting hollow space should be poured with concrete, and if you need to increase the height of the supports you need to make a masonry of red brick.

Base on piles

When professional builders think about how to make a foundation for an extension to a house, they most often resort to the method of forming a base on screw piles. This is due to the fact that this construction is the cheapest and easiest for light buildings. As one minus, a susceptibility to corrosion, but this can be eliminated by the method of anti-corrosion treatment. Installation work will be carried out in the shortest time, after the completion of the work, it is permissible to proceed with further construction. For a small support object, you can screw it yourself, which will make the work less expensive.

Preparation of concrete

Before you make the foundation for an extension to the house with your own hands, you should ask how the correct mixing of concrete is made. From its quality will depend the success of further work. The darker the color of the cement, the safer and stronger the mixture will be. If you have not yet encountered the process of mixing, you should remember the correct sequence of laying the components in the concrete mixer. Initially, water flows, further the rubble, sand and cement are laid. The sequence must be observed in order to achieve uniform composition. While all components are mixed, the concrete mixer should be switched on, but during the rest of the motor of the equipment it is possible to measure the ingredients and bring them up for subsequent mixtures.

Conclusion

If you are faced with the question of how to make the foundation for an extension to the house of the blocks, then you can use the above recommendations. They require the use of appropriate mechanical equipment for mixing the solution. This eliminates the formation of the seam between the layers being poured.