Alchatek Blog

Pressure grouting, also known as permeation grouting, stabilizes and strengthens weak or loose soil. This process involves injecting a fluid grout mixture under pressure into the ground. As a result, the grout fills voids, cracks, and spaces between soil particles. While cement grout is often associated with pressure grouting, polyurethane grout offers several advantages.

Understanding the Pressure Grouting Process 

The grout used in this process is typically a low-viscosity, flowable mixture. This allows it to penetrate and fill the void spaces effectively. The injection starts at the lowest elevation, allowing the grout to set before moving to higher elevations. Consequently, this compacts the soil layer by layer.

Essential Tools

Specialized equipment is crucial for effective pressure grouting. For instance, operators use grout pumps, injection pipes, and packers to control the pressure and flow of the grout mixture. This ensures that the grout reaches the targeted areas effectively.

Polyurethane: An Alternative to Cement Grout 

While cement grout is a common choice for pressure grouting, polyurethane grout offers several advantages. Polyurethane is more lightweight than cement, making it less likely to sink after curing. Additionally, polyurethane resists erosion, ensuring long-lasting stability. Furthermore, polyurethane cures faster than cement grout, allowing for quicker project completion.

The Bottom Line

In summary, pressure grouting with polyurethane provides a versatile and effective solution for soil stabilization. While cement grout is often associated with this technique, polyurethane offers several advantages, including lighter weight, reduced erosion susceptibility, and faster curing times. Low-viscosity polyurethane grout under pressure fills voids, consolidates loose soils, and strengthens foundations. With the right equipment and expertise, this method delivers long-lasting solutions for various soil-related challenges.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information about stabilizing soil with polyurethane?

Many homeowners notice over time that their concrete patios may begin to sink or become uneven. Not only does this create an unsightly appearance, but it also poses tripping hazards and potential for accidents. Concrete patio leveling using polyurethane foam offers a precise, durable, and cost-effective solution compared to traditional methods like complete replacement.

The Benefits of Polyurethane Foam for Patio Leveling

Polyurethane foam lifting, also known as slab jacking, excels in raising sunken concrete slabs. Technicians drill small holes into the concrete and inject the foam beneath. The expanding foam fills the voids underneath the patio, lifting it to the desired level with pinpoint accuracy. This method is not only faster than replacing the entire slab but also provides a long-term solution that is less invasive and environmentally friendly.

Precision and Durability

Polyurethane foam allows for precise adjustments to within 1/8 inch of the desired height. This control ensures a smooth patio surface that seamlessly matches the surrounding areas. Furthermore, the durability of polyurethane resists further sinking, sagging, or washing away, outlasting traditional methods like mudjacking.

Speed and Convenience

Using polyurethane foam significantly speeds up the repair process. The foam reaches 90% of its full strength within just 15 minutes, allowing you to use the patio the same day you complete the repair. This quick cure time minimizes disruption and offers a convenient option for busy homeowners.

Environmental Impact

Opting for polyurethane foam also benefits the environment. This method reduces the carbon footprint compared to pouring new concrete, which involves more substantial material and energy use. Be sure the contractor you hire uses repair material that has been NSF-certified for contact with potable water.

Finding a Concrete Patio Leveling Contractor

Choosing the right contractor is crucial to the success of leveling your concrete patio. You must select professionals experienced in polyurethane foam lifting. These specialists use industry-leading products and techniques to ensure proper leveling and long-term stability of your patio.

If uneven concrete plagues your patio, don't wait for the problem to worsen. Contact a qualified contractor who specializes in polyurethane foam lifting to efficiently and effectively restore your patio to its original condition. This solution not only enhances the appearance of your patio but also eliminates safety risks, providing peace of mind.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on polyurethane concrete leveling?

Construction and building maintenance rely on effective waterproofing to ensure longevity and structural integrity. In fact, waterproofing protects against water damage and moisture-related structural issues in residential homes, commercial buildings, and infrastructure projects. Positive side waterproofing and negative side waterproofing are two different methods that are used based on factors like construction design, budget, and water exposure.

Positive Side Waterproofing

Positive side waterproofing applies the material to the exterior or positive side of the building structure—the side exposed to the elements and potential water ingress. As a result, this method creates an outer surface barrier that prevents water penetration. Positive side waterproofing offers several advantages. Firstly, it provides effective protection by preventing water intrusion from entering the structure, as the externally applied material acts as a barrier. Secondly, water pressure actually assists in the process by pushing the cured material against the building, which helps to maintain a watertight seal. Finally, since the waterproofing layer is applied externally, it allows for various aesthetic finishes to be applied on the interior surface without compromising the functionality of the waterproofing system.

Negative Side Waterproofing

On the other hand, negative side waterproofing treats the interior surfaces of the building. Consequently, this method prevents water infiltration from the inside surface. While negative side waterproofing can be more cost-effective in the short term, it comes with several disadvantages. One major drawback is the limited protection it provides, as it does not protect against external water pressure. Additionally, negative side waterproofing fails to prevent the corrosion of reinforcing steel, as water can still reach it. Interior waterproofing may also impact the design and finishing of interior spaces. Furthermore, water pressure constantly pushes waterproofing material away from the surface, significantly reducing its service life compared to positive side waterproofing.

Choosing the Right Method

Various factors, including building design, site conditions, budget, and water exposure influence the choice between the positive side and negative side waterproofing. Additionally, it's important to understand that chemical grouting allows for positive side waterproofing application from the negative side without excavation. The decision should be based on a thorough assessment of the building's needs in consultation with an experienced contractor. 

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on waterproofing?

A pool deck provides the perfect place to relax and enjoy the summer sun. However, an uneven deck can be unsightly and dangerous. This article explains the causes of settling and an advanced pool deck leveling technique using durable, eco-friendly polyurethane.

Causes of Pool Deck Settling

Soil Erosion

Poor drainage, improperly placed downspouts, leaking drain pipes, and broken water lines can all contribute to soil erosion beneath pool decks. As a result, the soil washes away, forming voids and causing the deck to settle and become uneven.

Poor Soil Compaction

During pool construction, contractors should properly compact the backfill soil. However, if they do not execute this step correctly, the soil may settle over time, leading to an uneven deck surface.

Biological Decay

Construction debris, buried trees, and other biodegradable materials can decompose underneath pool decks. Consequently, as these materials break down, voids form, causing the deck to sink.

A Durable Pool Deck Leveling Solution

Polyurethane Foam Injection

Polyurethane foam injection, also known as slab jacking, offers an effective method for leveling pool decks. The process involves injecting expanding foam beneath the settled areas of the deck. As the foam expands, it fills voids, compacts loose soil, and lifts the deck back to its original level position.

Benefits of Polyurethane Foam

• Lightweight: Polyurethane foam is much lighter than alternatives like cement grout, putting less stress on the underlying soil.
• Fast-curing: Polyurethane foam cures in just 15 minutes, allowing you to use the pool deck the same day.
• High strength: Polyurethane foam can support up to 14,000 pounds per square foot, ensuring long-lasting results.
• Environmentally friendly: Furthermore, many polyurethane foams, like Alchatek's AP Lift 430 and AP Lift 475, are NSF-certified to comply with strict environmental standards.

The Pool Deck Leveling Process

1. Site evaluation: First, experts conduct a thorough assessment of the pool deck to identify settled areas and determine the best injection points.
2. Preparation: Next, if necessary, they make saw cuts in the deck to release any bound slabs.
3. Injection: Then, technicians drill small holes into the deck and inject polyurethane foam in controlled bursts.
4. Monitoring: Afterward, they monitor the deck for lift using precise measuring tools like dial indicators, zip levels, or laser transits.
5. Finishing: Finally, experts drill and inject additional holes as needed to achieve a level surface.

Pool Deck Leveling Contractors

Uneven pool decks can be a safety hazard and detract from the beauty of your backyard oasis. By understanding the causes of pool deck settling and hiring a contractor skilled in advanced solutions like polyurethane foam injection, you can restore your deck to its original level condition.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on concrete leveling with polyurethane?

Are you dealing with a damp basement due to leaking walls? Water seeping into your below-grade rooms can ruin living spaces, destroy stored items, and lead to mold growth. However, you can stop this problem by hiring a contractor trained in sealing concrete cracks.

What Causes Concrete Wall Cracks?

Several factors can cause basement wall cracks that allow water intrusion:

• Imperfect construction: New homes often develop leaks if builders don't properly waterproof them
• Aging concrete: Exposure to hot/cold cycles and general aging creates cracks over time
• Unstable soil: Soil issues like erosion, poor compaction, and freeze/thaw cycles undermine foundations

While temporary surface repairs exist, polyurethane injection from the inside provides the best long-term solution. Depending on your situation, trained waterproofing contractors will likely use one of two methods.

Option 1 - Polyurethane Crack Injection

Polyurethane crack injection offers several advantages. Depending on the structure, contractors may be able to do it from either side of the wall, allowing the space to remain in use during repair. Additionally, the polyurethane material reacts with the leaking water to cure into a flexible seal (allowing for slight structural movement over time).

The Crack Injection Process

1. Locate and prepare the crack surface
2. Drill injection holes along the crack at an angle
3. Flush the holes with water to remove debris
4. Install injection ports and inject water to confirm the flow direction
5. Inject polyurethane grout, normally starting at the lowest point
6. Reinject grout a second time
7. Inject a final round of water to reactivate any remaining grout

Contractors need about 1 gallon of grout per 25 linear feet of cracks. Although this process is straightforward, it's not a DIY or handyman project. Always consult a professional to ensure they use proper techniques and materials.

Option 2 - Polyurethane Curtain Wall Grouting

Curtain wall grouting involves injecting an entire wall or section with polyurethane to create a waterproof barrier. This method is ideal when a wall has numerous cracks that are difficult to locate and inject individually.

The Curtain Wall Grouting Process

1. Drill a diamond-shaped grid of injection holes across the wall
2. Beginning at the bottom, inject each hole with polyurethane grout
3. Work up the wall, with each new row of grout flowing over the previous
4. Continue until the entire area is sealed

The injected grout penetrates into the soil behind the wall, forming a water-impermeable curtain. Consequently, this "positive side" waterproofing stops the water at its source. As a result, it blocks any seepage from entering the wall.

Contractors pioneered this technique in the 1960s for leaking manholes, and it's effective on concrete, block, stone, brick, and even wood or metal. They often use it for basements with hard-to-find cracks, previously failed injections, or masonry walls unsuitable for individual crack injection.

The specific polyurethane grout used for a curtain wall depends on soil conditions, voids, and water volumes. Therefore, always consult with a waterproofing professional so they can choose the ideal grout and injection pattern.

Hiring a Professional Trained in Sealing Concrete Cracks

Both polyurethane crack injection and curtain wall grouting are highly effective when trained experts do them properly. With either approach, the injected grout creates a permanent, flexible water barrier that reacts with the leaking water.

Once professionals permanently seal the leaks, you can confidently use your below-grade room without worrying about future water damage. As a result, you'll enjoy your dry, comfortable space for decades to come!

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information about crack injection and curtain wall grouting?

Uneven concrete slabs are a common problem for homeowners. Level concrete slabs are ideal. Not only do sunken slabs look unsightly, but they can also pose safety hazards. However, there's no need to worry. In this post, we'll explore why slabs sink and how polyurethane foam can effectively level them.

Why Do Concrete Slabs Sink?

Concrete slabs can sink for various reasons. Firstly, erosion from poor drainage or leaking pipes can cause issues. Secondly, poorly compacted soil during construction may lead to settling. Lastly, the decay of organic materials under the slab can create voids.

Over time, these issues create gaps or destabilize the soil beneath the concrete. Consequently, slabs settle unevenly.

Level Concrete Slabs with Polyurethane

Polyurethane concrete leveling, also known as slab lifting or slab jacking, offers an effective way to raise and stabilize sunken slabs. The process involves drilling small holes into the slab and injecting expanding polyurethane foam underneath. As the foam expands, it fills voids, compacts the soil, and lifts the slab back into place.

Polyurethane foam has several advantages over other methods like mudjacking. Firstly, it's a minimally invasive process. Secondly, it has a quick curing time, allowing the slab to be usable within 15 minutes. Additionally, it's a lightweight yet durable material. Moreover, it's eco-friendly. Lastly, it's more affordable than total slab replacement in most cases.

A Jack Attack System is sometimes necessary in addition to polyurethane foam. This triangular steel frame helps the technician adjust the slab's position. Often, a measuring device called a dial indicator is used to track the exact level of the slab.

Common Areas for Concrete Slab Leveling

Sunken slabs can affect various areas of your property:

• Garage Floor Slabs: Uneven garage floors can make parking and walking difficult. 
• Basement Floor Slabs: Settling basement floors can lead to water pooling and moisture issues. 
• Patio Slabs: Sunken patio slabs can ruin the aesthetic and functionality of your outdoor living space. 
• Walkway Slabs: Uneven walkway slabs pose tripping hazards for you and your guests. 
• Driveway Slabs: Sunken driveway slabs can damage vehicles and make snow removal challenging. 
• Pool Deck Slabs: Settling pool deck slabs can be dangerous and unattractive.
• Porch Slabs: Uneven porch slabs can detract from your home's curb appeal. 

In most cases, polyurethane foam injection works well for residential concrete lifting needs. 

Level Concrete Slabs: Next Steps for Homeowners

If you're dealing with sunken concrete slabs, don't let them diminish your home's safety, value, and appearance any longer. Instead, consult a professional contractor experienced in polyurethane foam lifting to assess your specific situation and determine the best solution for your property. With the right approach, you can enjoy safe, attractive, and level concrete surfaces once again.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on how to level concrete slabs?

When it comes to fixing sunken or uneven concrete slabs, homeowners have two main options: slab jacking with polyurethane and mudjacking (lifting with cement slurry). Both methods aim to level the slab without demolishing or replacing it. However, they differ in their approach and effectiveness.

What is Mudjacking?

Mudjacking involves pumping a mixture of cement, water, and other materials (known as "mud") under a sunken slab to raise it. This process has been around for over 60 years. While it can lift settled concrete, it has some drawbacks.

The weight of the mud material can be as much as 100 lbs per cubic foot, which can cause further settlement. Moreover, mudjacking requires drilling 2-3" holes in the concrete to pump the thick material through. These holes need to be patched and can be noticeable. Additionally, the mud pumped under the slab takes a lot of time to cure, sometimes up to a couple of days.

Benefits of Polyurethane Slab Jacking

• Lighter Weight: Polyurethane weighs only 2-4 lbs per cubic foot. This lightweight material helps stabilize the soil without adding extra weight that could cause further sinking. Furthermore, polyurethane expands to fill voids and crevices, providing excellent support.
• Smaller Holes: Polyurethane injection requires only 3/8" holes, which are much less noticeable when patched. This results in a cleaner and more aesthetically pleasing repair. 
• Faster Curing Time: Polyurethane cures quickly, reaching up to 90% full strength in just 15 minutes. This means the slab can be used almost immediately after repair. 
• Less Disruption with Minimal Equipment: Polyurethane slab jacking requires less heavy equipment compared to mudjacking, resulting in minimal disruption to the surrounding property. The process is less intrusive and can be completed more efficiently, causing less inconvenience to the homeowner.
• Permanent Bonding: Polyurethane forms a strong, permanent bond with the underside of the concrete slab. This creates a secure, long-lasting solution that effectively supports the slab and prevents future settling or sinking.
• Water Resistance and Erosion Prevention: Polyurethane is water-resistant, which helps prevent further erosion of the soil beneath the slab. By sealing out moisture, polyurethane minimizes the risk of future settling caused by water-related issues, ensuring a more stable and durable repair.

Considering these advantages, polyurethane slab jacking is optimal for most concrete leveling situations. Its durability, effectiveness, and ease of application make it the go-to solution. When considering slab jacking, homeowners should seek a qualified, experienced contractor to ensure the best results.

Lifting Concrete with Precision

When faced with sunken or uneven concrete slabs, slab jacking with polyurethane offers a more effective and long-lasting solution compared to mudjacking. Its lightweight properties, smaller application holes, and faster curing time make it an efficient choice for homeowners. By opting for polyurethane slab jacking and working with a reputable contractor, homeowners can successfully restore their concrete surfaces to a level and stable condition while avoiding the potential drawbacks of mudjacking.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on lifting concrete slabs with polyurethane?

Unstable ground conditions can cause significant damage to structures built on sandy soils. However, sand stabilization with permeation grouting offers a solution to this problem by stabilizing loose sandy soils to create a solid base. This article explains the stabilization process.

The Problem with Sandy Soils

Sandy soils are prone to instability. Specifically, rain can easily trigger erosion, causing settlement issues that lead to cracks or uneven surfaces in various structures. Moreover, poor compaction worsens the problem, compromising structural integrity.

Permeation Grouting: How It Works

Permeation grouting involves injecting low-viscosity grout into loose sandy soils. For instance, AP Soil 600 is a single-component, moisture-activated, hydrophobic polyurethane grout. Once it cures, it transforms the sandy soil into a solid mass, thereby providing stability.

Diverse Applications

Furthermore, permeation grouting is useful when traditional solutions are not feasible. Its non-invasive nature suits confined spaces and delicate excavation scenarios. Additionally, this technique applies to a wide variety of project types.

The Installation Process

The installation process for permeation grout is straightforward. First, workers drive injection rods into the ground at the required depth, typically spacing them 18 inches apart. Then, they add a catalyst to the grout and slowly pump it into the soil using a suitable pump system. The amount of grout used depends on the depth of the soil being treated.

Fast and Effective Results

Within 24 hours of injection, permeation grout cures, solidifying the sandy soil and providing support for the structure above. As a result, this quick and effective solution ensures the longevity and stability of buildings and infrastructure.

Find a Sand Stabilization Contractor

Permeation grouting is a powerful tool in the fight against erosion and soil migration. By transforming loose, sandy soils into a solid base, this technique helps secure the stability of structures and protects them from the damaging effects of unstable soils. Understanding how permeation grouting works can help property owners and managers choose a qualified sand stabilization contractor.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on stabilizing soil with polyurethane?

Sunken concrete slabs plague many property owners. Over time, erosion, shifting soil, compaction, and other factors lead to concrete settlement. As a result, neglecting this issue can cause structural damage, vehicle damage, trip hazards, and other liability risks. However, contractors skilled in leveling concrete with foam offer an efficient and effective solution.

Sunken Concrete Repair Options

Property owners can choose from three main options to repair sunken concrete:

• Replace the Slab: This messy, time-consuming, and expensive option involves removing and re-pouring the concrete.
• Mudjacking: Also called slab jacking with cement grout, this method requires heavy equipment and large drill holes. Furthermore, the cement may crack and sink again over time.
• Leveling with Polyurethane Foam: Contractors inject lightweight foam through small holes drilled in the slab. Subsequently, the expanding foam quickly raises the concrete with minimal invasiveness and long-lasting durability.

Why Polyurethane Foam is Ideal for Concrete Leveling

Several key benefits make polyurethane foam ideal for leveling sunken slabs:

• High Strength: Slab lifting foams deliver compressive strengths stronger than clay or bedrock. Moreover, the foam gains even more strength when injected under the slab.
• Fast and Efficient: Polyurethane foam slab jacking proves much faster than replacing concrete. 
• Minimally Invasive: The polyurethane lifting process requires smaller holes and lighter equipment than mudjacking or replacement.
• Lasting Results: High-strength polyurethane foams provide long-term durability and load-bearing capacity. 
• Environmentally Friendly: Alchatek's lifting foams are NSF-certified to strict environmental standards.

The Polyurethane Concrete Leveling Process

Contractors follow a simple 3-step process to level concrete with polyurethane foam:

1. First, they strategically drill 3/8" holes into the slab and install injection ports.
2. Next, they inject high-strength polyurethane foam through the ports.
3. Finally, the expanding foam beneath the slab fills voids and lifts the concrete back to a level position.

After lifting, contractors patch the drill holes and seal any cracks. Subsequently, the repaired concrete is ready for use about 45 minutes later. Depending on the size of the repair area, the entire process often takes just a few hours.

Get Started Leveling Concrete with Foam

If sunken concrete slabs plague your property, Alchatek is ready to help. As a leading manufacturer of polyurethane foam injection materials, our expert team offers project guidance and connects you with qualified local contractors.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on leveling concrete with foam?

If you're a homeowner dealing with concrete leaks in your basement or below-grade living spaces, it's essential to hire an expert who specializes in polyurethane leak seal grouts. These advanced products offer a cost-effective, durable solution for waterproofing your home. Moreover, a skilled contractor will ensure that your home leak repair job is done right.

Why Standard Methods Fall Short

Professionals often find homeowners who have tried to fix leaks with sump pumps or hydraulic cement. While these methods may provide temporary relief, they don't address the root cause. Sump pumps only remove leaking water. Furthermore, hydraulic cement can crack due to its rigidity and inability to withstand structural movement.

Advantages of Polyurethane Grouts

Contractors choose polyurethane leak seal grouts for their superior performance and durability. These products stop leaks at their source. Additionally, they remain flexible after curing, allowing them to withstand structural shifts without failing. Polyurethane grouts offer strength and safety for residential and even industrial use.

Leave the Application Process to the Pros

Although the application process for polyurethane leak seal grouts may seem straightforward, experienced contractors should handle it. They know how to properly drill holes, attach static mixers, and inject the product effectively. Moreover, a skilled professional will ensure that the grout forms a flexible, watertight seal, stopping leaks for good.

Understanding the Causes of Concrete Leaks

Experts understand the various factors that cause leaks in concrete, such as imperfect construction, weather, wear, and unstable soil. Additionally, they can assess the situation and determine if your home needs follow-up leak seal treatments or if there are underlying issues like unstable soil.

Environmentally Safe Solutions

When you hire a contractor who uses Alchatek products like Spetec PUR F400 and Spetec PUR HighFoamer, you can trust that the solutions are NSF-certified to strict environmental standards. To maintain NSF certification, companies must undergo periodic inspections of their manufacturing plants and have their products frequently retested. This ongoing process ensures that the products consistently adhere to the stringent standards set forth by NSF, rather than simply meeting the requirements once to gain initial certification.

How to Find a Home Leak Repair Professional

In summary, dealing with leaks in your below-grade living spaces can be stressful. It's crucial to hire a professional who specializes in polyurethane leak seal grouts for a reliable, long-lasting solution. With their expertise and access to high-quality, environmentally safe products, these specialists are your best ally against home concrete leaks.

Fill out this form or call 404-618-0438 for a contractor referral today!

Want more information on residential leak seal solutions?