Foundation underpinning is the process in which we repair the foundation that has been weakened. The load underneath the foundation is the major thing that goes through this remedy. We do different types of underpinning based on the project we have at hand. That is why it’s imperative to understand the structure of the foundation we want to repair, and the various things that cause the foundation damage.
When Is Underpinning Needed To Be Done?
You should know that not all foundation damage will require underpinning repairs. You only need underpinning if the foundation can support the structure. Loose soil is one of the factors that will affect the how your foundation support your structure. And this may be due to some excavations projects or weathering of the soil. If you have any of these issues, foundation underpinning can be the way out.
What is Underpinning Process?
The situation of the project at hands will determine the underpinning to choose from. Below are various Underpinning you can choose from:
The traditional underpinning
This is best for underpinning that is not too deep and requires you to excavate the weak soil under the foundation and applying concrete in those areas, which strengthens the foundation. This signifies that the base will be stronger than the ground that holds that foundation, which means the weight of the structure, is supported in an efficient manner
The base and beam Underpinning
This method does not only use the traditional supports but also incorporate the beam to strengthen the foundation. The load is passed to the concrete beam we have under the foundation. The beam the turns this load into a concrete base that helps to support the foundation. The beam construction is a function of the architectural design of such building or foundation.
This requires you to transfer loads to the underground foundation to strengthen the soil beneath. The depth of the ground is more than 5 meters. The piles are constructed of steel that has a diameter of 15-30cm. The piles are holes that are driven into the foundation, which allows them to rest on the stable ground. We have a collection that reaches 15m to the ground level.
Setting Up Temporary Support
Before your underpinning process, you have to do some temporary support. This support can be steel or wood. And they will be removed immediately the projected is executed. A basement wall will help you deal with most of the cracks; natural expansion, cracks cause those cracks. And these cracks can lead to leakage. Some cracks may appear small but can leads to your building failure as times goes on. When this occurs, you need to repair those cracks to keep water from your basement. Though the repair of these cracks can be difficult, with the right guidance and materials, you can repair. The steps below are various ways to repair your basement cracks:
Step One - Remove Dirt
Make sure you remove the oil paints and the dirt with a brush. If the regular wire brush can remove the dirt, you can go for the option of a paint remover. A soft brush will be needed to clean the surface with dust.
Step Two - Apply Surface Sealer
After getting your sealer, inject it in the points you have the cracks, and starting at the lowest point of the crack. The sealer should not cover the cracks. Attach something in every 6-inch of the cracks. Use the epoxy to activate the sealer, and then cover the crack with the epoxy and wait for about 10 minutes. You will know when it correctly applied when you can’t scratch it with your nail.
Step Three - Prepare to Inject Urethane
Apply a little water to the uppermost part of the crack. This water act as a major catalyst for the urethane that will expand if added later. Find the nut of the urethane cartridge on the top. Remove this bolt, apply mixer to the cartridge, and then reattach the nu you initially removed.
Step Four - Inject the Urethane
Begin at the bottom of the crack and let the Urethane fill the cracks. You will see foam which signifies a catalyst reaction between urethane and water. This foam will fill the crack.
Step 5 – Inspecting the Repaired Crack
You will need to wait for at least a day and pour water on the surface. Then look for any leakage. If there are no cracks that mean that the Urethane has filled the crack. And the water you pour on it will not leak. Then you can proceed with the covering of the wall because it has been covered and will not leak.
Repairing Foundation Leakage
Repairing a foundation that is leaking won’t take you a decade; it only involves few simple steps. And if the crack is not fixed now, they may lead to other things that will require more expense in the long run. What caused this leak and the effect of the leak on the foundation, this few factors will determine the repair the foundation will require. This is because reasons of those leakage are more important than how you will Reaper them.
Step One – What is the cause of the leakage
The leakage of the foundation is when water penetrates the building, and getting a way to prevent this water from penetrating these cracks will help avoid the leakage. Locate the cracks that are penetrated by the water, and walk around to see other are of penetration.
Step Two - Prepare the Foundation
You can do around the foundation with shovels. Dig up to 30 m to create a slope. The sharper slope will allow you divert water from your building.
Step Three - Applying the Plastic Sheets
Use a sheet and apply adhesive, and place soil on it. Clay soil is recommended because it won’t allow water to trickle down. What you need to repair leakage may vary; epoxy resin works well for small cracks. And concrete for large cracks. Just make sure you follow the right procedure to fix all of these cracks.