My Foundation Repairs and Waterproofing News

Foundation repair and basement waterproofing news and information.

My Foundation Repair - The foundation solutions site

clock February 26, 2009 20:14 by author blogadmin

MyFoundationRepairs.com and our installing contractors, is synonymous with superior training, quality products and superior customer service. With the largest independent network of trained foundation experts we service 46 states and over 160 cities. Our roots are based in superior engineering and technology in the foundation repair industry.

While many organizations are based on large television budgets and fancy marketing, our network is founded on supplying homeowners with the best solution for their foundation problems at a reasonable cost. Don't fall for the hype and slick advertising, inform yourself through our resources and make an educated decision for your home. 

Remember, cracks in your foundation or around doors and windows mean you could have a serious problem. These cracks do not get better by themselves they need to help of foundation repair contractors that have been trained to solve these issues.

As always, My Foundation Repairs recommends that you hire a trained foundation engineer when a concrete foundation problem is suspected. Feed



Concrete Foundation Repair

clock February 26, 2009 19:44 by author blogadmin

Hydraulic piering can be used to lift and stabilize sinking concrete. Whether you have cracks, water problems or settling basement walls hydraulic push piers may be the best solution for your foundation repairs. Foundation settlement and movement requiring foundation repair can be caused by building on expansive clay or improperly compacted fill soils, or the lack of maintenance around foundations. Whatever the reason, understanding steel hydraulic push piers is the first step to fixing your concrete foundation problem.

Hydraulic push piers are driven pier systems consisting of sections of galvanized steel pipe supporting steel foundation brackets. The piers are a point bearing pile that are driven with a hydraulic ram through unstable soils to a load bearing strata. Sufficient hydraulic pressure is required to make sure that the pier material is able to reach this load bearing stratum or bedrock. Pressures of 4,000 to 8,000psi are very common on average homes.

Each pier is then individually load tested, and the structure is either stabilized or lifted with a synchronized hydraulic manifold system to insure maximum practical recovery. The manifold system is generally required by foundations engineers to lift or effectively stabilize a home. This system has been shown to successfully support structures in virtually all soil conditions, and can be used for stabilizing foundations and slabs built on questionable soil, as well as seismic protection, and commercial applications.

For more detailed information on the steps of repairing a failed foundation visit http://www.earthcontactproducts.com/PierInstallationSequence.asp

 



World of Concrete Foundation Repair Technical Seminar

clock February 24, 2009 06:43 by author blogadmin

Earth Contact Products held their annual engineering and technical information seminar at the Rio Hotel and Suites in Las Vegas. The seminar,  Techniques for Rapid Design and Bidding Deep Foundation Projects coincided with the first day of the World of Concrete Trade Show. The technical seminar, presented by Don Clayton, PE covered subjects including Estimating Structural Loads on Footings, Determining Safe Pier Spacing, Helical Shaft Selection and Slender Shaft Buckling.

This annual technical seminar was attended by over 40 companies representing 34 states including engineers, foundation repair contractors and design professionals. Each attendee was presented with a complimentary copy of ECP's Seventh Edition Design and Technical Service Manual for their individual library of industry related text. This latest edition in technical manuals by Earth Contact Product is quickly becoming the industries source book for steel deep foundation products and their applications. ECP offers this resource book on their website www.earthcontactproducts.com , along with other valuable foundation repair industry information.

Earth Contact Products is the industry leader in foundation repair technology and customer support. The national network of factory trained installation specialists cover 46 states including all major cities. Earth Contact Products also provides a free preliminary design service for its installers and industry engineers to insure that every job is done right and efficiently. If your foundation needs fixed demand that only ECP products are used to support your foundation.



Foundation Engineering Workshop

clock February 24, 2009 06:39 by author blogadmin

Engineer & Designer Workshop

 

Starting on February 19th, 2009 Earth Contact Products and Mays Construction Specialties, Inc. offered a two day technical and informational seminar in Grand Junction Colorado. Seventy –two engineers, architects and contractors attended the two day workshop at the local Holiday Inn in Grand Junction.

 

Over the two days topics ranging from deep foundation systems, foundation underpinning, concrete repairs, grouting, cellular concrete and polyurethane grouts were discussed by ECP, Xypex, Strata-Tech, Cellular Concrete, LLC, Williams Form Engineering and Super-Krete. White Cap construction supply was a non-participating sponsor of the event.

 

Day one started with Earth Contact Products presenting The History of Helical Piles, followed by Helical Pile Design and Load Capacities. After the lunch break Earth Contact Products continued their presentation about Resistance Pier Design and Installation. Xypex and Strata-Tech rounded out day one. Day two was completed with Super-Krete’s President Tracey Holwitz covering decorative concrete, bonding and coloring agents.

 

Initial feedback from those attending the seminar was very positive both from knowledge gained and the organization of the event by Mays Construction Specialties. Kyle Vanderberg, Vice President of Mays, stated “The interaction of the attendees and the speakers has been fantastic.” Jeff Tully, President and GM of Earth Contact Products, noted that many engineers approached and thanked him for sharing information about their underpinning and foundation repair products. Will this become an annual event for Mays, according to Vanderberg, “I do not see how it could not”.

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Causes and Signs of Failed Foundations

clock February 18, 2009 12:32 by author blogadmin
 
A foundations movement and cracking may result from a wide range of hidden factors, which may include:

•  Swelling or Shrinking of clays caused by changes in moisture content
•  Compression of the ground as a result of the applied foundation loads
•  Soil softening
•  Frost heave
•  Improper back filling of the foundation
•  Variation in groundwater levels
•  Erosion or undermining of the foundation
•  Vibration from nearby construction
•  Hydrostatic Pressure on the foundation

Inadequate design of basement walls, footings and slabs traditionally account for 75 to 85 percent of all problems in homes built upon expansive clay soils. These failures are generally divided between two broad classes of failure – lateral pressure and differential settlement. Both classes of failure generally have few primary causative factors.

Lateral pressures on basement walls have four likely sources:
•  Pressure from soil weights
•  Pressure from soil swelling
•  Hydrostatic pressure
•  Pressure from frost

It is not difficult to identify lateral pressure, but accurately quantifying the  source is very difficult and should only be handled by a qualified engineer. The inward bowing of a basement or retaining wall is the simplest indication of lateral pressure. The bowing generally occurs when the external forces exceed the wall strength. The maximum bowing will often occur near the center of the wall because the adjoining perpendicular walls provide support in the corners. If bowing becomes severe, these walls can collapse inward.

 
   

Cracking can occur when lateral pressure exceeds the strength of the concrete or block wall. The most common crack pattern begins in the corners and move up or down at 45 degree angles in concrete walls. For block walls, the cracks move along the mortar joints in a stair step pattern. Often these cracks end at a long horizontal fracture that parallels the basement floor.

 

Lateral pressures may affect the overall integrity of a house. Severe structural damage results in a visible opening between the top of the basement wall and the structure. Since water is one of the main causes of these cracks, water infiltration becomes significant in the largest of the cracks. Filling these cracks with epoxy, without solving the water problem, only moves the lateral pressure to another section of the wall.

The difference of the outside ground level and the basement floor creates a mass of soil that must be retained thus causing a lateral pressure. Picture a walk out basement or tall retaining wall. The pressure of soil weight is typically considered during the design of an engineered wall using theoretical earth pressures.

Soils with heavy clay content undergo a change in volume when the moisture content of the soil changes. When expansive clays are placed against basement walls, the swelling of these soils can induce lateral pressures not accounted for in the original design. Cyclic shrink/swell can also reduce the shear strength of the backfill and thus increase the lateral pressures. The solution to this problem can be as easy as replacing clay backfill with gravel or other non-swelling material. When used in conjunction with a footing drain, gravel will prevent increased lateral pressure.

Hydrostatic pressure is pressure exerted by a fluid due to its weight. Hydrostatic pressure against a basement wall develops when water fills voids or “ponds” within backfill immediately adjacent to the wall. This water buildup can cause dripping, seepage, dampness or efflorescence (salt residual). Leakage during heavy rains or poorly designed/maintained drainage increase hydrostatic pressure. Like soil swell, hydrostatic pressure is not typically considered during design and construction of basement walls.

Water that accumulates in backfill and then becomes frozen may cause a large amount of lateral pressure on basement walls. Severe damage can result from frost causing lateral pressures much greater than even hydrostatic pressure. The expansive natures of water crystals have been know to create catastrophic structural damage.

Backfill, that is heavily laden with clay, present long term lateral soil pressure problems. Their cohesive nature makes it practically impossible to re-compact them to a uniform moisture content and density. Clay backfills require significantly stronger basement walls to withstand the larger horizontal pressures. The obvious solution is to backfill with non-cohesive aggregate with proper drainage.

Structural settlement is characterized as either total and /or differential settlement. Total settlement is a complete structure downward movement. Differential settlement is the difference in vertical movement between various locations causing structure distortion. Generally, total settlement is not a critical factor as long as it is uniform. Utility connections are affected to the greatest degree by total settlement. Even relatively small differential settlements can cause cracks in floor slabs, brick walls and drywall.

 
   

Some amount of settlement can be tolerated in most homes provided it is within specified limits. Small amounts of settlements are anticipated in most design work. When homes experience excessive settlement special procedures must be employed to stop or limit the amount of settlement. These special procedures usually employ the use of steel piers or helical anchors. A underpinning procedures.



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