Polymeric Sand....Oversold?

Being touted as the "savior" for Brick Pavers is not true

The marketing machine for Polymeric Sand for brick pavers is in full force. Homeowners are embracing  the use of polymeric sand as the savior of brick pavers. Though there are some very good benefits, Polymeric Sand is NOT going to eliminate or prevent the need for ongoing paver maintenance.

Back 25+ years ago, I was frustrated with the perception that unqualified contractors gave homeowners...."Brick Pavers are NO maintenance !".  This could not be further from the truth and I had to spend needless appointment time explaining the myths these contractors created.

Polymeric Sand touting is the new frustrating "myth" that I have to spend countless time explaining the benefits and limitations.  Just this past week, I was frustrated with a customer who repeatedly said she wanted polymeric sand in the paver joints ..."so her bricks will never move!".

If she wanted to greatly reduce the chance of weeds or grass growing in the paver joints, if she wanted to reduce the chance of tracking any joint sand into the house, if she wanted to reduce the amount of sand sweeping each Spring of the paver joints, if she wanted to greatly reduce the erosion of any base material from rains, snow, & ice, then Polymeric Sand is a viable solution. In cases of extreme slope or water run off requires the use of bonding sand or permeable pavers.

But to keep your brick pavers in place for all time to come, well you are greatly misinformed. If that were true, we would fill all our road cracks & potholes in Michigan with Polymeric Sand and you would have a smooth ride from Detroit to Sault St. Marie.

Polymeric Sand is definitely beneficial in reducing the negative aspects of paving stones but you need to weigh the cost & benefits of it's use. If you can spend a half hour each Spring sweeping paver joint sand into open joints of your patio & walk, then Polymeric Sand is not necessary. Keeping paver joints filled already reduces weed & grass growth, loose pavers, and erosion damage.

Polymeric Sand requires patience and in most cases should be installed by a qualified brick paver contractor. Done wrong or sloppy, polymeric sand repair or removal can become a costly & tedious experience. Once winter frost goes through your brick paver paito, walk, driveway, porch, etc.. you will still need to touch-up areas each Spring.

Brick Pavers Dirty Little Secret : Paver Joints

Paver Joints are the most important part of your Brick Pavers Installation

It amazes me every day when I am doing estimates on brick paver repair & restorations that homeowners had no idea they needed to keep paver joints filled with paver joint sand. More than the paving stones themselves, paver joints have the most important function of interlocking brick pavers.  Here are paver joints dirty little secrets.

Paver joints are the whole purpose for brick paver "lock-up".  Paver joints for interlocking paving stones allow for the bedding coarse to shoot up and lock the paving stones together during plate compaction.  As the plate compactor vibrates across several paving stones at once, the paving stones depress and force the bedding coarse sand or slag to "jet up" into the paver joints and lock up the paving stones laterally.


The next important step is to sweep in proper paver joint sand to completely fill the paver joints. Full paver joints will help prevent the paving stones from loosening, shifting, and unnecessarily settle from erosion.  What is so perplexing is that sweeping in paver joint sand is so easy and effortless and most homeowners will not perform this basic paver maintenance requirement. In Ann Arbor, sweeping is usually necessary each Spring as the Winter frost, snow & ice, and Spring rains wash away the top of the paver joints.  The upgraded use of Polymeric Sand will greatly reduce the amount of paver joint sweeping due to the strength of this bonding sand. Here are some paver repair projects that we used Polymeric Sand to help avoid future repairs.

Keeping paver joints filled with paver joint sand is important to help keep weed seeds from establishing .  If the joints are not filled with sand, this presents a perfect setting for weed seeds or dirt to settle in and promote growth.  Dirt, weeds, and grass inhibit the proper flow of water through the joints and does not allow for application of a paver sealant.


 Paver joints absorb the winter frost effects of heaving so the paving stones do not crack, grind, or chip. While protecting the structural integrity of interlocking pavers, paver joints will lose joint sand over time. Sweeping in new paver joint sand is a small price to pay for protecting the beauty, appearance, and performance of your brick paver patios,walkways,driveways, and more.

In frost states like Michigan, it is highly recommended not to fill the joints of high density concrete pavers with mortar.  I see many outdoor applications using mortared interlocking paving stones that will some day fail.  Mortared paver joints in a frost State does not stand up to the flexible heaving of base laid pavers. The other important factor is that high density concrete pavers are much stronger than mortar. As the paving stones expand slightly they will crack or break up the mortared joints. This will become and unsightly and costly future repair.

After years of neglect, paver patios without paver joint sand may require us to completely  re-sweep in new joint sand and re-compact the whole patio with a plate compactor. This will help re-lock the paving stones into the bedding coarse. We will then finish off the top of the paver joints with an approved joint sand.

Most homeowners believe that you must protect the paving stones with a sealer which is not true. Sealing brick pavers is an option and is mainly for aesthetic purposes.  The best way to protect your interlocking pavers is to keep the joints filled with paver joint sand. This is a simple and very cheap way to avoid costly and unnecessary paver repairs.

Brick Paver Walkway Repair & Polymeric Sanding

This past week in Ann Arbor we did a brick paver repair of a brick walkway & porch approach. This brick paver walkway was in need of immediate attention. According to the customer, the paver walk had quickly deteriorated this past few years.  Due to the lack of yearly maintenance and some homeowner inspection, this paving stone walk began to fail.

This brick paver walkway had evidence of severe erosion due to joint gapping, lack of paver joint sand, weed & grass growth in the paver joints, and the exposure of the cement bead edge restraint.  Paving stones where loose and uneven and the brick walk was beginning to stretch or move out throughout the paver pathway & porch approach.

 We lifted up all the paving stones, power washed them off, recompacted the old paver base material, added some new paver base to relevel properly, relaid the paving stones, installed a new cement bead paver edge restraint, and finally finished off the paver joints with polymeric sand. We also covered up the outside edge restraint with soil & sod to protect the outside edges from erosion.


After we completed this brick paver repair project, I spent a half hour educating my customer on the yearly paver maintenance requirements. I also pointed out the early signs of any trouble the pavers may exhibit so he can have us address these issues before they become a costly paver repair.


Another successful brick paver restoration by Brick Doctor Bill this week. We will move on to the other side of Ann Arbor this week to help bring back the beauty & function of paving stones and retaining walls in your neighborhood!

Brick Paver Polymeric Sand for Paver Driveway

This past week in Ann Arbor we did a brick paver repair, cleaning, and polymeric sanding of a paver driveway. The paver repair was minor but we needed to do an aggressive cleaning of the pavers and paver joints. The customer complained he was experiencing weeds, grass, and excessive moss growth in their paver driveway.

The customer told me that they had the paver driveway installed about 5 years ago but they have not had any brick paver maintenance done. They have NOT swept in any paver joint sand since the paving stones have been installed!

Due to this neglect, the paver joints have been a breeding ground for the growth of weeds, grass, and moss.  The paving stones exhibited black soot and mold growth on the surface, thus inhibited the beauty and color of their interlocking pavers.

We started by spending over 6 hours aggressively power washing the paving stones and paver joints. We first made wet the paver driveway and agitated it with a stiff bristled brush and combination of water, bleach, and Oxy Clean solution. This special concoction helped cleaned the surface but power washing was necessary to completely deep clean the surface of the paving stones.

We then returned a couple of days later when all the paving stones and paver joints where dry so we could properly sweep in polymeric sand. In this particular paver driveway project, we used Pave Tech's SANDLOCK polymeric sand. We find this product to be durable and long lasting.

After vigorously sweeping the polymeric sand into the paver joints at a 45 degree angle, we use a simple leaf blower to blow off carefully the excess polymeric sand from the surface of the paving stones. It is important not to blow the polymeric sand out of the paver joints.

The final step is to wet the polymeric sand so the bonding of the polymers can begin. We began by gently misting all the paving stones and paver joints to begin the process. After lightly wetting the paver driveway, we gently misted paver areas so the polymeric sand was thoroughly soaked. We started at the highest point and worked our way down to the street, making sure that there is no run off or puddling. If there where any puddles, we used a simple wisk broom to remove excess puddled water.

When we completed the polymeric sand application, we instructed the homeowner to stay off the paver driveway for 24 hours to insure no tracking of the polymeric sand. The polymeric sand usually starts to harden after an hour but no need to push it.  Our customer was ecstatic with the results and I took the time to educate them on future brick paver maintenance to insure a less costly event.

Paver Patio and Step Repair & Cleaning completed!

We just completed this Paver Patio and Step Repair in Ann Arbor this week.  Our earlier post showed the before pictures of this extreme brick paver repair.  The homeowner was ecstatic with the results by Brick Doctor Bill's attention to detail and paver restoration.

After removing all the brick pavers, recompacting the sub base, adding more base, cleaning the paving stones, re-installing the paver patio & step pads, and sweeping in polymeric sand, the end result is a rejuvenated hardscape installation that they can enjoy for years to come!

The drainage issues are now resolved and the customer can now look out their walkout basement during their next party and not see such an eye sore.  Aside from the obvious safety issues, the repaired paver patio is now functional for entertaining and relaxing.

These paving stones are over 12 years old and are beginning to exhibit signs of weathering and wear.  Brick Doctor Bill will be returning in a couple of months to spot clean and seal the paver patio and paver steps with an approved brick paver sealant.  This will help restore the old color and aesthetics of the original paving stones.

Paver Patio Repair and Cleaning in Ann Arbor

We are currently working on a Paver Patio repair and cleaning in Ann Arbor. This paver patio had severe settling along the house foundation and due to no ongoing paver maintenance, the paver joints where full of weeds, grass, moss, and dirt. This particular brick paver repair will cost the homeowner $950 to clean & re-install approx. 90sq.ft of brick pavers & base, aggressively power wash the remaining 200 sq.ft. of brick pavers and paver joints, and re-sweep with polymeric (bonding) sand. Below I will explain the cause of these brick paver repairs and some steps to avoid costly patio repair in the future.

This first picture is of the paver patio area we needed to re-install the patio pavers.  This area experienced severe settling due to one major factor: WATER !  See the gutter coming down on the house in the left portion of the picture. It has been dumping water into this area of the patio since the paver patio was installed. The brick paver contractor should have designed or ran a drainpipe out into the yard to redirect this water flow. The customer said it has been a slow 4 year process of settling. Once this paver area began to settle, all water from the paver patio began to flow back into this area too.  Each Winter's frost feasted on this area due to the presence of water & moisture. The result: The pavers buckling and sinking over a foot down! She lost the use of about 1/3 of her paver patio since it became hazardous and unsightly.

To help avoid this brick paver repair, always make sure that all water from gutters is redirected into grass areas by buried drainpipes or gutter extensions. Also, at the first sign of settling and the water flow of the paver patio is moving back, it must be addressed or the damage will become more severe and expensive. Not to mention that this may cause water damage to your foundation or basement. We did connect a gutter extension so the water would flow out into the yard.

In this second  picture of the paver patio, you will see the results of brick paver maintenance neglect.  The paver joints have alot of dirt, weeds, grass, and moss growing in them. Grass has actually grown over the last 2 rows of bricks on the outside of the paver patio. This customer in 4 years has never re-swept paver joint sand in the joints each Spring. She was not aware of this small paver maintenance step since her landscaping contractor did not educate her on this need.  Now she is paying $300 to clean her patio pavers & paver joints and have re-swept with polymeric sand ! It would have cost her @$6.00 worth of regular joint sand and 20 minutes of her time each Spring to keep her paver patio looking good and functional!

We completed the work with 3 workers in a day but it was pretty grueling. The customer was ecstatic to have her brick paver patio & pride back! I took the time to educate her on some brick paver repair preventive steps that she can perform. If she is too busy, we can perform these brick paver services at a nominal charge. Do not let your brick paver patio get to this despair, it will only cost you money & heartache.

You can check out the finished results of this paver patio in a few weeks when we return to take some snapshots at Paver Repair Before & After on our Website. Look for our next job post within the week.

Brick Paver Sealing is for the Brick, NOT the sand in the joints!

After completing a brick paver sealing of a paver patio today, the customer said while handing me my check, "so I will not get any weeds, right?". It drives me crazy that customers are only concerned with the sand in the joints being sealed and not the patio stones. Sealing pavers is for the brick, NOT the sand!

Today's customer never commented on the enhanced color and appearance of the brick paver patio. They never asked any questions regarding the long term performance of the paving stones surface or protection from natural elements. They were never concerned about the cost or frequency of an approved brick paver sealer application. They were only concerned during my estimate and my completion of services about a 100% guarantee of NO WEEDS!

I usually have to slowly explain to potential clients that sealing of pavers is for the enhanced appearance and performance of the concrete paver. But as predictable, customers only hone in on the sand in the joints. They believe that the brick paver sealer is for sealing the joints, therefore making the sand permanently hard like mortar so weeds can not grow. It is true that the paver sealer will typically flow into the joints and temporarily harden the sand. But as the interlocking brick pavers expand or heave due to winter frost, these joints will absorb the pressure and loosen. Snow, ice, rain, and wind will eventually erode the sand and create opportunities for weed seeds to germinate.

I could have saved this customer 100's of dollars if the paver joints were their only concern. I could have simply used some brick paver polymeric sand in all the paver joints to harden for the season. Simple touch ups of paver joint sweeping each Spring will keep joints filled and hardened to deter any chance for a weed seed to establish. I always tell customers that the number one reason to seal brick pavers is for aestheitc values of the paving stones, NOT for the sand in the joints!