What role do rodents and other critters play in settling concrete?

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Raising settled concrete with Polylevel –

Occasionally we comes across some fairly large critter holes, do critters cause concrete settling? How big of a problem is this?

Animals are mostly opportunistic home builders, they seek out ready-made dens as much as possible then enlarge to fit their needs. Once they find a spot though, they can move a fairly large amount of supporting soil from under a porch or patio.  Once a depression has been made water can often more easily find its way under the concrete which results in further settling.

A concrete roof is ideal for a rodents home, they have a solid and secure roof with warm soil and they are mostly safe from humans.

If you notice paths leading under your concrete act to reduce problems. Fill with soil, or gravel, don’t put a hose in there, it just makes the hole larger. If you are ok with the concept use rodent traps or poison to eliminate the problem otherwise your job is to fill holes and block entrances. Rodents attract predators like snakes, who will also take up residence under your concrete once they’ve had dinner.

So in answer to the question, no, rodents are not a cause of initial concrete settling but can contribute to the problem.

The best solution for not only raising your concrete but for filling the voids used by rodents and other critters is Geo-polymer injection, it fills voids and unlike pressure grouting with mud can’t really be burrowed in, it’s too hard.

If you notice voids with or without setting concrete give us a call, we can help.

1-866-762-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

 

Concrete cracks – what causes them and what to do.

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Raise and level settled concrete – settlement cracks – polylevel – polylift

Concrete cracks; it cracks as it cures due to shrinkage, it cracks when placed on expansive soils and it really cracks as it settles.

When we are called to raise a concrete slab there are occasionally cracks the are not easily seen. As a slab settles it sometimes cracks and “pinches” together. Raising cracked slabs nearly always opens up the existing crack. This happens because as the concrete settles at the crack it actually pushes the two sides apart. After the slab is raised the crack should be filled with flexible caulk to improve appearance and prevent water intrusion.

1-855-752-2522s polymer injection raises settled concrete and stabilizes cracked concrete which reduces further damage along the crack line.

When concrete moves it often cracks, it’s either pay a little now or a whole lot later, or reduced profit at sale time. Give the concrete raising and leveling professionals today, we can help.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Slabjack Geotechnical is polylevel Concrete leveling In Washington and Idaho (855)752-2522

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Raise and level settled concrete –

Washington and Northern Idaho’s most experienced geo-polymer concrete lifting company is 1-855-752-2522. Now in our fifth year we have raised thousands of concrete slabs. Porches, sidewalks, pool decks, stoops, basement and garage floors warehouse floors, driveways and more have been raised and leveled with structural grade polyurethane.

Locations in Spokane and Central Washington and serving the entirety of Washington state and Northern  Idaho make 1-855-752-2522 your local source for concrete raising and leveling.

call today, 1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Beware of the mudjacking pyramid scheme

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Raise settled concrete.

The Great Leap Forward in concrete raising took place in 1983 when Geo-polymer Slabjacking was first introduced.

The material being injected as a liquid which quickly expands eliminated “pyramiding” of the material.

Pyramiding is when material goes in the opening of the concrete slab during the Slabjacking process and supports the slab in a pyramid shape.

Geo-polymers used in injection Slabjacking flow much better under the slab which provides a much larger force pushing up on the slab in comparison to pressure grouting. This better protects the slab from fractures and ensures superior coverage under the slab.

With pressure grouting the “recipe” needs to be followed to achieve duplicatable results, do you see measuring devices on their trucks? No.

With 1-855-752-2522s state of the art system the materials are computer controlled and measured, ensuring an exact, duplicatable end product that will be the same job to job, year after year.

Don’t fall for the pyramid scheme, call 1-855-752-2522 today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

No can do

Slabjack Geotechnical
Slabjack Geotechnical

 

Raising settled concrete,

Some slabs are not good candidates for concrete leveling, they have various issues including,

 

Excessive cracks – hard to get the puzzle level, best to replace.

Unseen supports under the slab – damage of the slab almost certain with attempted lift.

Cracks running adjacent and near edges – very difficult not to heave the crack line.

“Parquet” type concrete – similar to excessively cracked concrete, hard to get the puzzle level.

In addition to these, slabs where the cost to raise approaches the cost of replacement should generally  be replaced.  This can happen in rare cases when settling is excessive or there are massive voids under the concrete slabs.

Slabjack Geotechnical is able to quickly determine if your slab can be economically raised or whether replacement is the best choice. Call for a no obligation, no pressure estimate today,

1-855-752-2622

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

 

Case study – Common settled concrete trip hazards

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Common water main vault trip hazard.
Common water main vault trip hazard.

The above picture demonstrates something very common, settling at the main water service vault.

If you were to open the hatch at your water meter you would see a concrete vault or box going down  about five or six feet deep. Because it is sitting so low it generally does not settle. The sidewalk abutting it however is very prone to settling.

This is almost always a quick repair however the job is more complex than a typical sidewalk because of the potential for voids along the vault. In this respect it is much like a slab abutting a foundation wall.

These walks often need to be cut with a concrete saw so binding on the vault doesn’t cause fracturing of the slab.

Voids are common because water finds an easy path down along the vault, as water moves it carries particles of soil and before you know it the walk is settling and voids are developing.

The vast majority of these types of jobs are $300, our minimum job charge. Occasionally it will go slightly higher due to the voids being extensive, but that is fairly rare.

If you find this type of trip on your sidewalk give us a call, we can help.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

Slabjack Geotechnical – your local source for concrete repair

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Raise settled concrete slabs-

We love to do business with local companies that we know will be here tomorrow. At the same time we want to spend our money wisely and not overpay for a product or service. Don’t we all feel that way?

With the recent purchase of our new truck for Spokane and Northern Idaho we received two very different bids to build the truck for us. One from a well-respected company in Georgia the other from an instate company. Wanting to do business with an instate company we hoped their estimate would at least be close. It wasn’t. They were over fifteen thousand dollars more than the out-of-state company, a company we had worked with in the past and knew to do excellent work.  What to do?

We called the local company and explained that we really wanted to give them our business but because of the huge difference there would need to be some pretty drastic movement on their estimate for us to offer the work to them. We explained that some of the equipment they had specked out may be unnecessarily large, we even allowed them to see the list of equipment the other company was including so they could compare apples to apples. While some local companies, for whatever reason are unable to compete with out-of-state businesses the vast majority of the time they work hard to gain your business if you allow them the opportunity to do so.

Doing business locally makes sense, the dollars spent with 1-855-752-2522 are rolled over many times in our communities with the purchase of fuel, housing, food, employment, taxes and much, much more.

Dollars spent locally pay employees in this state, pay taxes to support services we all use, and enable all of us to prosper. For these and many other reasons we are committed to purchasing locally and regionally as much as possible and encourage others to do the same.

1-855-752-2522, your local source for concrete leveling and crack repair,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

 

Voids now, settling concrete later

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1-855-752-2522 raise settled concrete
An obvious void under an entry, most voids are unseen
An obvious void under an entry, most voids are unseen.

 

This picture demonstrates how voids against foundations form. In most cases the concrete would also settle but with this example the entry was “pinned” with rebar to the foundation.  Over time the rebar will rust and weaken, eventually failing causing the slab to drop.

As you can see by the slope behind the entry, water was being channeled toward the home, this slope caused all the runoff and snow melt to compact and wash away soil resulting in the settling seen above.

Most slabs and porches against a foundation have voids which will eventually cause settling. Geo-polymer injection fills these voids and raises your concrete back to level but in order to have a lasting repair additional corrections need to be made, things like;

Correcting slope by re-grading, installing gutters and directing down-spouts well away from foundations, addressing sprinkler systems and plantings too near foundations and insuring ponds and other water features are not overfilled creating flooding. (Something I’m all too familiar with at my home)

Caulking joints and cracks in concrete plays an important role in reducing concrete settling and can be done when we raise your concrete for an additional fee.

In the above example we quickly filled this void by blocking one side of the void and filling the cavity from the other.

If you see voids or have settling call today, we can help.

1-855-753-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

How to DIY concrete crack repair

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I’ve written a few blogs in the past about repairing cracks in concrete, today I’d like to dig a little deeper and explain what product to use in a given situation and why.

While we provide concrete crack repair services and are happy to do so, these are jobs that many folks with time and patience can do to save money.

If you have used a product you feel good (or not) about feel free to leave a comment. This by no means is meant to be an exhaustive list of the products available, there just too many to review in a blog.

The one thing I wouldn’t use in any moving joint is concrete mortar. As soon as the joint moves it will crack and begin to deteriorate. Mortar is just fine for patching a rock pop or a missing chunk but not in a control joint or a crack. (accidental control joint)

Far and away the best way to stabilize a crack in concrete from movement is to “bridge” the underside of the crack with Geo-polymer foam. This is accomplished by making injections in a “stitch” pattern along the entire crack line. Then the crack can be repaired with confidence the repair will last.

OK, here they are –

Flexible Polyurethanes – for most exterior cracks flexible polyurethane caulking works just  fine. In this line are fairly inexpensive products available at the big home improvement stores or the local hardware stores as well as some really good commercial grade products. We have used products from all three and have found them sufficient if not always long-lasting solutions. Also available from Quickrete is a liquid caulk in a squeeze bottle, bluntly put don’t waste your money on it. The solids settle to the bottom of the bottle and no amount of shaking seemed sufficient to break them down which resulted in clogs followed by an ejection of the material. Our current”go to” product is Masterseal SL1. Formerly Sonolastic brand, Masterseal is a superior commercial grade polyurethane. It adheres much better to concrete than the box store products yet maintains flexibility in a wide range of temperatures. The “SL” stands for self leveling so it is used for level or nearly level joints and cracks. (Not 45 degree angles) Masterseal also has products suited for sloped or vertical sealing if needed. (NP1) The average cost for DIY’er with this method is between $.50-2 a linear foot. Because this is a self leveling product you will need to fill wide or deep cracks with foam backer rod to reduce usage and waste. Masterseal sells a non off-gassing foam rope in two diameters that reduces bubbling of the material even if the rope is punctured.

Rigid Polyurethanes – these two-part systems are used for filling and structurally repairing interior cracks. Because they yellow when exposed to ultra violet radiation they are not good candidates for exterior cracks unless they are topped with another non yellowing material such as self leveling polyurethane caulking or Polyurea. This method is much more time-consuming and costly and some of the brands can only be purchased by licensed contractors. These materials are first injected into the crack allowing the material to absorb into the concrete which is followed by filling the crack with structural sand (silica) which is then saturated with more of the polymer. The material generates a thermal reaction so it sets in about ten minutes. When hard, the excess can be ground off with a finishing stone or a small hand grinder. Excellent for garages and other interior concrete the cost for a DIY’er is between $2-7+ a linear foot. Unlike Polyurethane caulking where you can greatly reduce product usage with the addition of foam backer rod, the ridged Polyurethane systems are designed to fill and adhere to the concrete top to bottom and completely saturate the sand filler in order to “weld” the joint back together. As a result the width and depth of the crack play a major role in how much material you will need.

Rigid epoxies – these two-part systems are in many ways comparable to the two-part Polyurethane systems spoken about in the preceding paragraph. They are applied the same way,  both use Silica sand as a filler and both are finished with a stone or grinder. Epoxy can be used both indoor and out without concern with yellowing.  So why would one choose a two-part Polyurethane over a two-part Epoxy? Both set up to about 4000psi, basically the same as concrete. The advantage that Polyurethane has its retention of a degree of flexibility which allows it to better adhere without developing a crack along the repair. Epoxy is brittle in comparison. Cost for the DIY’er is about the same as the two-part Polyurethane $2-7+ a linear foot.

With either the Polyurethane or the Epoxy repair any movement of the slabs along the crack line will crack the repair. Geo-polymer Slabjacking with the intent to bridge the crack greatly aids in stabilizing the crack.

Polyurea –  another product to consider is polyurea, this is the same stuff they spray on pickup truck beds. It is extremely durable and also comes as a two-part system. The material is injected into the crack, if the crack is deep or wide I recommend a filler of some type as it is fairly thin, foam rope works well and sand can also work as long as you allow enough room for the material to adhere to the sides of the crack. Thermally activated this product sets up fairly quickly depending on the weather, ten to thirty minutes and according to the directions only an hour to drive on it. We have been very pleased with this product with one exception, the first little squirt needs to be purged into a waste container and as a precaution the last little bit of the set not used too. We have had some small areas not cure due to off ratio material which needed to be cut out and re-done. If done properly Polyurea hardens to the consistency of a hockey puck, adheres tenaciously and should last years. It comes in grey or black. The cost for a set of material is about $60 and will do between ten and thirty feet, again width and depth of the crack determining the difference. So $2-6 a linear foot, more if you use sand as a filler as it will absorb the material.

In addition to the mentioned products above there are Acrylic caulks, and ready mixed Vinyls that can be used. The ready to use Vinyl is difficult to make look good as it is applied with a putty knife not a caulking gun but it seems to work well on spalled concrete or to bridge gaps or to fill height differentials between slabs, for cracks I would stay away from it especially if appearance is important to you.

These are just a few of the available products available for crack filling and repair that we have used. Here are our top recommendations;

Exterior crack fill – Masterseal SL1 (long lasting crack and joint filler)

Exterior crack repair – Emecole epoxy for concrete repair

Interior crack repair – Roadware polyurethane concrete mender (contractor only)

Special purpose – Emecole polyurea (nearly permanent expansion joint filler)

OK, there it is. Whether DIY or hire 1-855-752-2522 we’re happy to offer helpful tips and where to buy information, call today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Case study -Raising a settled concrete patio

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A typical patio with minor settling under the sliding door.
A typical patio with minor settling under the sliding door.
Jobs done! Notice how it is nice and tight against the door frame, just like new!
Jobs done! Notice how it is nice and tight against the door frame, just like new!

Once concrete settling starts you can expect it to accelerate. This is because rain, snow melt, sprinklers and any other source of water will start to drain in the direction of the settling.

In the example above, the slope was minor but still enough to channel large quantities of water to the foundation, first creating voids then settling.

The solution? 1-855-752-2522s geo-polymer injection. It quickly fills voids and gently raises your concrete back to proper grade. Slope problems are corrected quickly and in most cases for 1/4 to 1/2 the cost of replacement.

If you have a settled porch or patio like the one pictured above call today, we can help.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.