Settling slab in a pole building? Slabjack Geotechnical

Settling Slab in a Pole Building
Settling Slab in a Pole Building

www.SlabjackGeotechnical.com

1-855-752-2522

Pole buildings present some unique challenges because they are not built on a traditional foundation as most structures are in freeze/thaw climates. In addition it is uncommon for builders to specify reinforcement such as rebar or welded wire mesh. As a result cracking and settling are common.

There are many things that should be taken into consideration PRIOR to building a pole building that will greatly minimize problems with the concrete portion of the structure, but that’s for another post. For now let’s consider what to do when things start to go wrong.

1) It won’t ever be less costly to fix the problem, so if you can….fix it now before greater problems rear their ugly heads.

2) There are several options for slabs going bad; replacement, raising and top coating. Let’s discuss these three.

Replacement – best option if the settling is severe, the slab has several fractures or if there are serious underlying issues with the base soil. Advantages; new appearance, can re compact the base, can add rebar and/or wire mesh. Disadvantages; have to empty out building, disruptive, takes time to tear out old slab, frame and pour then cure time up to four weeks, most costly by far.

Raising – methods include Mudjacking, polymer injection and pressure grouting. Each method has advantages and disadvantages however having used the first two methods and seen the aftermath of the third we have focused our contracting business on polymer injection exclusively since 2011. Advantages; less costly, less invasive, ready for immediate use, depending on the extent we can even underseal and insulate your floor! In addition slab raising is a proven method which has been in existence since the 1930’s if the underlying soil is stable the repair should be permanent.

Top coating – pouring additional concrete over the slab to “fill in” lower/settled sections. Advantages; new appearance. Disadvantages; additional weight will exacerbate settling problems, cracks right where under slab has cracked, can be costly, temporary fix.

If you find yourself dealing with the pole building going bad give the concrete raising and leveling professionals call today.

Superior technology, Superior polymers, Superior results.

1-855-752-2522

Slabjack Geotechnical SPI 350H – vs – PolyLEVEL PL250 & PL400

Slabjack Geotechnical
Slabjack Geotechnical

1-855-752-2522

www.SlabjackGeotechnical.com

Raising sinking concrete slabs,

When we entered the concrete raising business in 2011 we made a commitment to be on the cutting edge of the industry in order to provide the best value to our clients.

In addition to embracing technology both in our estimating software and with our truck and trailer metering equipment we determined to use the best polymers we could find.

What determines “best”?

1.  Superior lifting ability; After testing Both Polylevel PL250 and PL400 against SPI 350H we found the following differences; The SPI 350H has a much more vigorous expansion. The quick reaction time has a huge advantage; the ability to raise very heavy structures (concrete) without needing massive amounts of material. According to the literature provided with the materials, PolyLevel PL400 and even PL250 do not lift with the aggressiveness of the SPI’s 350H

2. Superior control; With a much faster setting polymer comes much greater control over the lift. This is especially important with smaller slabs such as sidewalks or slabs leaning against a foundation. Simply put the other guys polymers don’t cut it when lifting small slabs, the material migrates to places not desired and the lift is not forceful enough to localize lift to areas desired. Even on larger slabs such as driveways the other polymers create undesirable lift.

3. SPI has formulated 350H exclusively for 1-855-752-2522 the 350H (hydrophobic) is super fast reacting at very low temperatures which provides less off gassing, less chance of charing and superior control.

I could go on, there really is no comparison between the three polymers, the polylevel foam is more like void filling foam and not really up to the task of raising concrete. They are advertised as four pound foams but comparing them side by side they appears to be about half the density of SPI’s polymer. One is structural the other literally breaks apart or crumbles under foot.

You have a choice, Slabjack Geotechnical or some other guys.

Superior technology, Superior polymers, Superior results.

1-855-752-2522

www.SlabjackGeotechnical.com

Slabjack Geotechnical case study – raising a settled concrete garage floor

18557522522
1-855-752-2522

One of the more frustrating things to have settle is a garage floor. The difficulty of replacement as well as the extremely high cost begs for a better alternative. Fortunately there is one, 1-855-752-2522!

One of the garage floors we recently raised is a good example of what is possible. The garage had settled along a crack line down the center of the garage a full six inches.

A string line was pulled across the crack line and 5/8″ holes were drilled for the injection valves on either side of the crack in a grid pattern to lift and also to provide support where void would be created by the lifting process.

Gradual support was added to gently raise the settled slabs back into alignment with surgical precision.

Once aligned, injection holes were patched in preparation for final crack repair at which point the garage floor was ready for use.

Each floor presents its own unique challenges, call the concrete raising and leveling professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Slabjack Geotechnical case study – settled concrete outbuildings and shops

18557522522
1-855-752-2522

Outbuildings and shops are typically built by a simple concrete slab on grade construction. While not heavy, due to the lack of a foundation they can be prone to settling. Replacement of the slab foundation is extremely difficult making concrete leveling the “go to” method of repair.

In addition to settling, cracking is also common. Fortunately Slabjack Geotechnical is prepared to deal with both settling and crack repair.

Geo-polymer Slabjacking with particular attention to bridging the crack line with the polymer thus underselling  and stabilizing the crack coupled with epoxy injection which fills the crack with a durable repair material that also binds the slab back together is the least costly, quickest and least disruptive method to return your outbuilding  to full use.

We recently leveled a pump house for a school district in Central Washington. Geo-polymer Slabjacking coupled with I-beam bracing due to very large void under one corner enabled the district to save their pump house, continue to operate the sprinklers and saved the taxpayers thousands of dollars.

If you are having problems with a small tool shed a large warehouse or anything in between call 1-855-752-2522 today, we can help.

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

 

Case study – settled concrete pool decks

Tilting pool deck
Tilting pool deck

Pool decks that have settled need to be repaired soon or major problems can result. In the photo above, a large gap has opened up allowing water to penetrate behind the pool wall. Over time this can have disastrous results as not only support for the deck is compromised but for the pool itself.

With the pool above, injections are made on the outer edge to raise the settled areas at which point a good quality pool caulking will need to be used to seal the pool to deck joint.

The old saying “pay me now or pay me later” really applies here, this job is under $600. Replacement about $1500 and delaying repair could be thousands.

When the time comes call the professionals,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

Slabjack Geotechnical case study – settled concrete driveway

18557522522
1-855-752-2522

We recently leveled a driveway that is a good example of what can be accomplished with geo-polymer Slabjacking.

The three car driveway covering six separate panels had settled under the control joint going left to right due to a drainage issue. The settling caused the drive to “cave” in.  As a result we had to bring all six slabs up along the control joint.

Holes were drilled on either side of the control joint four feet apart and two feet from the joint. Because the material flows roughly four feet in diameter we were assured excellent coverage.

A string line was pulled across the settled section and material was injected to bring the slabs into alignment, assuring a smooth transition across the drive.

This drive also had a crack so stabilization of the crack was important to increase the longevity of the repair. Holes were drilled on either side of the crack at one foot intervals and small injections were made to “stitch” the crack back together, injections were made with the intent of bringing material all the way into the crack, thus completely immobilizing the fracture.

Experience matters, call the concrete raising and leveling professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

Slabjack Geotechnical case study – settled concrete pool decks

18557522522
1-855-752-2522

1-855-752-2522 raises many pool decks, a large number of them either municipal or for multi family homes/apartments. Each one is instructive of the care we take with what is a huge investment for either a community a real estate investor or a home owner.

After the initial inspection is made and a plan formulated for repair, the owner is advised of all recommendations, told the estimated cost to level the deck and warned of potential dangers associated with the procedure. The customer then signs an acceptance of responsibility, acknowledging their acceptance of the risks associated with pool repair and absolving us of any liability.

Why do we do this? No concrete raising company can see through concrete, as a result there is a slight possibility that material will flow against pool sides potentially causing bulging on fiberglass and vinyl pools. Gunite pools are much more robust in construction and are much less prone to damage from the Slabjacking process, however they too are asked to sign a release before work begins.

As of yet we have not damaged a pool, we take great pains to avoid even the possibility of damaging one. Occasionally we turn down a pool job because we determine the potential for damage is too great to proceed.

Replacement of pool decks carries risks as well, breaking up concrete that is against or on top of pool walls can chip Gunite, dent steel walls on vinyl pools (or damage the liner) or damage gel coats on fiberglass pools. It is also very costly because it has to be done by hand as large equipment can easily damage the pool.

Once we are approved to proceed, 5/8″ holes are strategically drilled for the injection of the geo-polymer. We very carefully monitor lift to the 1/1000″ to insure it is happening only where we want it. Occasionally we will use a pry bar or even a toe jack to help the slab into position. These tools help direct material where it is needed providing lift and support only in locations we desire. Once all the slabs are back in alignment the holes are patched and it is available for immediate use.

Experience matters, call the concrete raising and leveling professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

Slabjack Geotechnical case study – settled concrete sidewalk

18557522522
1-855-752-2522

One of the more common problems we come across are entry walks that have settled below steps.

Conscientious builders find ways to ensure porches are stable either by using a foundation, Sonotubes or simply pinning the porch to the foundation wall. Walks however are often just poured on unprepared soil which results in settling.

One walk this summer is instructive of what we do and the effort made to insure it will not resettle.

The porch had Sonotube support, however the walk had settled three inches which made the final step a ten inch drop. The porch had two steps plus the landing so the drop was  7″ – 7″ – 10″ this can be a real stumbling hazard especially for senior citizens.

We made an inspection of the walk AND the porch to pinpoint voids, water runoff and shrub/root issues. We determined that in addition to an injection for leveling the slab, additional injections would be made for support and void filling. These additional points of support being necessary to insure the long-term stability of the walk as a large void was found under the porch. (It was high and dry above the soil perched on two Sonotubes)

After leveling the walk the other support injections were made stabilizing the walk for years to come.

Experience matters, call the concrete raising and leveling professionals today, 1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior polymers, Superior results.

 

 

Slabjack Geotechnical case study – Raising a settling basement floor

18557522522
1-855-752-2522

Settled interior concrete can be especially challenging. The incredible cost of demolition and removal, the unbelievable mess and the time to do the work all conspire to ruin you week.

We recently had a job that demonstrates the advantages of concrete raising over replacement.

The home, a vacation property was unoccupied when the water line broke, how long it ran is anyone’s guess but the result was roughly four inches of setting across over four hundred square feet,nearly half the total footprint of the building.

Replacement costs were estimated to be fifteen thousand dollars due to the distance to the site, difficult interior work which would not enable large machinery to be used necessitating hand removing several tons of concrete and the challenges of re-pouring concrete in an existing structure.

1-855-752-2522 was called and an estimate provided of $3016. We arrived on site, drilled roughly thirty 5/8″ holes, installed the injection ports and pumped roughly three cubic yards of RR401g fully hydrophobic geo-polymer foam under the slab raising it back to proper grade, all in two hours!

If you are dealing with settled concrete, call the professionals today,

1-855-752-2522

www.SlabjackGeotechnical.com

Superior technology, Superior Polymers, Superior results.

Slabjack Geotechnical case study – Settled concrete porch

18557522522
1-855-752-2522

 

Wide but not deep porch "pinned" to foundation.
Wide but not deep porch “pinned” to foundation. File photo.

We recently raised a large decorative concrete porch, this porch is fairly typical of what we find as we provide estimates.

The porch measured roughly one hundred square feet and was wider than it was deep.  There were two columns with decorative stone work attached. The porch had been “pinned” to the foundation so all the visual settling was on the outward edge of the porch, however as expected there was a large void against the foundation wall In the neighborhood of six inches.

Replacement would have been very costly. In addition to the porch itself the issue of the stone columns which also acted as a support for the roof line would have been problematic.

A series of six 5/8″ holes were drilled through the porch and injection valves were tightened into place at which point geo-polymer foam was injected under the porch. A total of five hundred pounds were used, in excess of four cubic yards of material to first fill voids, then compress loose soils then to gently raise the porch back to proper grade. All in about four hours.

Drill, Inject, Patch.

Superior technology, Superior polymers, Superior results.

call today, 1-855-752-2522

www.SlabjackGeotechnical.com