We’ve been talking a lot about post-tensioning lately because in Denver, we have an interesting combination of many old parking garages around the city, combined with a lot of new engineers. Post-tensioning has been an effective technique for reinforcing concrete in parking structures and garages for decades, and even though they have good track records with regard to maintenance, it’s important to identify and correct problems early.

When an inspection reveals a problem that needs to be addressed, it’s critical to choose a company with post-tension expertise to execute the repair. Certification from the Post Tensioning Institute (PTI) alone is often not a sufficient indicator for safe, quality repairs. Experience is key.

PTI is a nonprofit organization that has generated manuals, best practice procedures, and certification classes designed to train engineers and field personnel in correct post-tensioning installation. However, installation and repair are totally different animals. The PTI training manuals, while important, cannot be applied to both activities.

Plus, no two repairs are exactly alike. Sometimes technicians don’t even know what they’re dealing with until they start removing concrete from a structure — a potentially dangerous process for anyone without adequate hands-on experience.

That’s why direct experience with post-tension repairs is crucial. This includes experience with building inspections, practical knowledge of specialized tools, and recent history performing repairs on a variety of different structures.

HEXA technicians have comprehensive training including hands-on experience with installation, assembly, and safety regarding post-tensioning replacement and repair so they can:

  • Help diagnose cracking slab or joint misalignment
  • Figure out why chemicals are leaking from within the walls
  • Determine the weak points in a structure and calculate exactly how to strengthen them
  • Keep safety the utmost priority

Post-tension repair is an important investment and trusting your job to just anyone can be a very costly mistake. Reach out to us today, and let’s chat about how we can help support your post-tension repair needs.

Post-tensioning has been an effective technique for reinforcing concrete in parking structures and garages for decades. Here’s some background on the basics of post-tensioning. Although post-tensioned structures typically have better track records when it comes to maintenance, they are complex systems that are subject to some specific vulnerabilities, especially when initial installation was less than ideal. Identifying and correcting problems requires special investigation and repair expertise and techniques.

There are several challenges to consider with post-tension repair work:

  • Many buildings have unknown history. Present-day building owners may not know what materials or systems were involved when their structures were built. Trained experts can spot and diagnose issues quickly.
  • Specialized knowledge is rare. Knowing how to repair older concrete structures requires specific experience and specialty tools. Dealing with post-tensioning systems can present conundrums for any contemporary engineer who is unfamiliar with how to diagnose or repair its unique issues.
  • Repairs can be costly when contractors aren’t properly trained. When a structure or building needs a repair, specifically post-tension repair, the investment can get out of control if the contractors don’t possess practical application and hands-on experience. These repairs also come with inherent challenges and safety risks.

This doesn’t mean post-tension repair needs to be a huge stressor. Still, it’s critical to choose a team with extensive knowledge as well as field experience with safe, efficient diagnostics and restoration techniques. Post-tension repair is one of HEXA’s specialties and a technique in which we have certification through the Post-Tensioning Institute.

Contact us and we’ll perform a complimentary inspection with an estimate for repair work.

Check out our Post-Tension Repair brochure here.

Pioneered in the 1930s by French, structural engineer, Eugene Freyssinet, post-tensioning is a system for reinforcing concrete, structural elements. It consists of pre-installed steel tendons that run the length of the beam or deck span, are anchored at both ends, and then are stressed when installed.

By applying a pre-stress load, post-tensioning pre-emptively counteracts tensile stresses and is therefore an active reinforcing system, whereas rebar is passive. By keeping the concrete in compression, post-tensioning strengthens the concrete and foundation and helps reduce cracking. While the buildings can stand on their own, the post-tensioning carries the load.

Post-tensioning is typically used in parking decks, garages, bridges, and nuclear reactors built since the 1970s and 1980s. With age comes wear and deterioration. What original designers didn’t foresee, however, was the extensive use of salts and de-icing chemicals on these structures in cold weather. This contributed to faster wear and a greater degree of damage, including rust, which must be identified and repaired to keep the structures safe.

Many engineers evaluating the condition of these older structures were not even born when these structures were built. New engineers must assess buildings and make determinations when there is quite possibly no engineering information available from the original design. In addition, today’s engineers may not be as familiar with older systems which can be very different from the modern systems they install today. For example, parking decks built today are waterproofed; 50 years ago, they were paper wrapped. Most owners don’t know what materials were used in their structures, and most engineers don’t know how to deal with button head or rod systems from the early 1970s.

That’s where Colorado’s experts in post-tension repair come in. HEXA’s team has the in-depth know-how to repair and restore these structures safely and efficiently. We can help you understand what cracking, joint/slab misalignment, or chemical leaks from walls means for the future of your structure – and what it takes to repair it. Reach out today, and let’s chat about how we can help you add many useful and safe years to the life to your structures. Check out our Post-Tension Repair brochure here.

In 1999 Mike McDonald founded McDonald Waterproofing and Restoration with a vision to bring honesty, friendliness, and concrete repair services of the highest quality to Colorado’s Front Range. Established on straightforward values of integrity, doing the job right the first time, having fun, and friendships with team members and clients, we’ve built a solid, trusted reputation throughout Colorado.

January 2020 marked the company’s 20th anniversary. Along with achieving that milestone, and in anticipation of the upcoming sale and transition, the company was renamed HEXA – a McDonald Company. The new name represents the excellence and efficiency of the team and the strength under pressure that characterizes our specialty repair solutions.

Now the company marks yet another milestone. Mike McDonald has announced his retirement and has sold the company to Joe Keller. Joe has worked in the concrete repair industry more than 20 years, many of those spent with Mike, helping grow HEXA into the company it is today. He has served the last three years as President and COO, building on the vision that Mike created more than two decades ago.

“I’m proud of this company and the entire team who helped us get to where we are today,” said Mike. “Joe is a strong leader who has been instrumental in our growth, and it is with great pride and confidence that I pass the baton, and ownership of this great company, to his continued leadership.”

“I’m honored that Mike has entrusted me with his legacy,” commented Joe, HEXA’s new Owner, President, and CEO. “HEXA has the hardest-working people and the best customers. It’s a privilege to take over ownership as we grow the company, do the work we love, and continue to make lasting friends along the way.”

In 2021, we watched our company grow — not only welcoming new clients and completing many great projects, but also expanding our team. We created positions, brought in additional experts, and focused on ways to make the HEXA family stronger and more cohesive.

To set a marker for continued growth and expansion, we started a new tradition in 2021; during our annual Christmas party, we give away a motorcycle to an employee who wins a raffle by having their name drawn from a hat. Each year, as we grow, so will the bike be bigger and better!

This year, Braulio Alvarez was super-excited to win a fun, Coleman 200cc minibike. With a top speed of about 20 mph, it’s great for zipping around the neighborhood or running errands. Braulio has been a valued part of the HEXA team for a little more than a year, working as a technician/laborer. Other employees also won fantastic items — a 65-inch Samsung TV, Yeti cooler, and gift cards. All HEXA staff members received Wyld Gear water bottles and cups. This new tradition celebrates what being part of HEXA is all about – the fun and camaraderie of working together as a solid team.

With a lot of projects already booked for 2022, we are fueled by the energy and excitement that comes with working in a positive environment, growing along with great people who are dedicated to the values on which this company is built, and serving customers who have also become cherished friends. We stand behind each other and have our customers’ backs in protecting their concrete investments. We anticipate great things and look forward to sharing more good news as the year unfolds. Stay tuned for 2022’s bigger, badder bike!

Post tensioning is used instead of traditional rebar in applications where it’s especially important to reduce concrete shrinkage or eliminate cracking. This method of strengthening concrete is a good choice in a variety of applications. We’ve recently been doing post-tension repairs in a parking garage at Metro Point in Denver to restore strength to concrete and thought we’d share a little about the process.

Post tensioning uses steel cables – referred to as post-tensioning tendons – inside plastic ducts or sleeves that are positioned in the forms before concrete is poured. Once the concrete has gained strength, but before it has to support service loads, the cables are pulled tight – or tensioned – then are anchored against the outer edges of the concrete.

If post-tensioning components become weakened or damaged due to water intrusion, we remove the concrete to expose the deteriorating tendons. We then install new hardware and tendons and re-stress the cables before replacing the concrete. Finally, we waterproof the new concrete to maintain its integrity and prevent damage to the post-tensioning cables, which can be especially vulnerable to Colorado weather.

Repairing or altering post-tension cables is one of HEXA’s specialties. To discuss restoring the strength of your concrete for years to come, call the HEXA experts today. Check out our Post-Tension Repair brochure here.

HEXA is currently working on an extensive and interesting repair at the top of the huge atrium at Wells Fargo Bank in Denver, which needs to be resealed. The area apparently started leaking several years ago and was undetected at first. Eventually, the leaks became visible, then progressed to the point that buckets sometimes had to be put down to catch water during heavy rains or snow melts.

This massive project will require cutting out and removing the old, weakened sealant and installing new caulking on all window-to-window joints. It will require at least six months to complete. To give you an idea of the scope of this job, once it’s done, we will have replaced 52,000 linear feet of caulking on 2,900 windows – many of which we can only access by tying ourselves off and using the 14 ladders that are attached to the exterior of the building. No fear of heights here!!

This is a perfect example of the damage Colorado weather can inflict on buildings and why periodic inspections are so critical. When windows have not been checked and resealed at regular intervals, caulking can deteriorate and water leaks can sometimes result in structural damage depending on where they occur. We’d like to offer you a free inspection to make sure your concrete and sealants are sound.

It has been just over a year-and-a-half since we celebrated our 20th anniversary and renamed our company to HEXA™ – A McDonald Company to mark the end of a successful 20 years and the beginning of a new phase in our growth. We chose the HEXA name and logo because:

  • Like the hexagon, it shows that we are stronger under pressure, delivering the highest quality solutions.
  • Like the strong community bond of bees within a hive, the hexagon-shaped cells of the hive represent our commitment to communicating and building solid relationships with our customers.

We’re the same great company, run by the same people, with the same values. As one of the most well-respected locally owned and operated concrete repair companies in Colorado, it’s no surprise that word gets out about why it’s great to work with, and for, HEXA!

We’re excited that over the last 18 months we’ve grown and added new team members. We welcome these highly experienced and skilled people to our team. They’ve been in the industry for decades and are eager to work for a fun and progressive company.

If you know of anyone with concrete repair expertise who shares our values of delivering honest, friendly, quality service every time and is looking for a positive, fun company, tell them to check out our job openings!

We are deeply grateful for our customers who put their trust in us to keep their concrete structures strong, resilient, and stable. We’d welcome the opportunity to get to know you better, help solve your concrete issues, and become a resource you can continue to trust. We look forward to serving you!

The HEXA team has decades of experience, and we pride ourselves on staying current on the most innovative and cost-effective ways to keep your concrete working for you. Our team is currently tackling a complex and interesting project – reinforcing two concrete columns at the main entrance of an older apartment building in Denver to extend their longevity.

These columns are structural, running six feet above and three feet below the surface concrete, so their weight-bearing capability is critical to the building. To ensure that they can continue to do their job, we are strengthening these columns by pouring concrete then adding a carbon fiber wrap to further reinforce the columns.

Fiber-reinforced wraps can be up to ten times stronger than steel, yet thinner and flexible to help increase the load-bearing capacity of concrete. Shoring up the columns is a complex, multi-step process. The project is rewarding because by extending the life of the columns, we are extending the life of the building itself.

Call us to schedule a free inspection or if you suspect you need repairs. Addressing those needs now will save you money down the road.

Just another day at the office for HEXA. We wanted to share with you our beautiful view as we are busy inspecting winter and sun damage to window sealants. This is a common issue we’re seeing a lot of these days. If not addressed, it can allow water and chemicals in, which could eventually lead to structural damage and the need for major repairs.

Constant exposure to the elements can lead to sealant failure. No one likes a leaky building. Don’t get stuck with an average fix that leads to future complaints. At HEXA, we’re sealant specialists. We assess windows and use the proper sealants to wet seal any window perimeters that are leaking or will be in the near future.

Exterior repair locations can be difficult to access, but with our expert team and know-how, nothing is out of reach!