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.

Paver Tip: Sweep in Joint Sand to Winterize Your Pavers

Necessary paver maintenance for Winter

If your pavers patio, walkway, driveway, porch, etc.. is in need of paver joint sand this Fall, this is an important time to perform this brick paver maintenance service.  One of the most important steps in winterizing your pavers is making sure the paver joints are filled with joint sand.

Winter snow, ice, and melt off will run into paver joints that are not filled with joint sand and may create preventable settling, erosion, or heaving.  I gave some suggestions for preparing your pavers for Winter in an earlier post about winterizing brick pavers. A quick review will  help you insure long-term performance of your paving stones patio, walkway, or driveway.



Paver joint sand creates friction between paving stones causing vertical and rotating interlock to occur.  Paver joints play a cushioning role in preventing damage between paver to paver contact.  Angular or course joint sand will prevent sand movement and help sand retention in the paver joints, thus avoiding long term erosion or settling of your patio paving stones.

It is so simple to just sweep in paver joint sand. In the Fall, you can just concentrate on sweeping paver joint sand in the areas that are in need of joint sand.  Touch-up sweepings throughout the year will save you unnecessary paver repairs over the years. Neglect of this simple brick paver maintenance requirement will result in costly paver repairs.  So during this Halloween season, grab a broom from a witch and sprinkle in some paver joint sand from Lowe's and start brewing.

Brick Paver Joint Sand: Change in my Recommendation

#1 Brick Paver Maintenance Requirement

For years now I have preached to my clients, "Do NOT sweep play sand into your brick paver joints!".  Well, I have a slight change in my recommendation for this yearly brick pavers maintenance requirement.  Play Sand generally is a fluffy yellow sand with very little granular substance to assist in bonding. In Ann Arbor, this type of sand graduation will splash or blow out of brick paver joints and make your experience with interlocking pavers frustrating. Silica Sand also does not perform well as a paver joint sand.

As mentioned in early posts, keeping your paver joints filled with joint sand is a crucial yearly requirement for the long-term performance of paver patios, walkways, driveways, porches, etc.. . Paver joint sand is essential in keeping proper lock-up of the paving stones and help deter the effects of erosion, settling, and weed growth.

Most brick paver manufacturers distribute an approved paver joint sand that is either privately labeled or from a national supplier.  Obviously these products are an approved paver joint sand to use for your interlocking pavers project but usually carry an unnecessary cost and not readily available to you geographically.

For the last 10 years I have been recommending and using Quikcrete's "all purpose sand" for paver joint sweeping. This all purpose sand had a similar sand graduation (sieve rate) as the more costly paver manufacturer's joint sand and is also screened, washed, and dried.  These processes are important to remove unwanted substances like dirt, weed seeds, and silt.

This past Spring I started to notice that  Quikcrete's "all purpose sand" was beginning to have a larger sand graduation (sieve rate) which was allowing larger pebbles to be present in the mix. These larger pebbles of sand either do not sweep into the paver joints or lodge themselves in the joint, thus not allowing proper filling of the paver joints.  We found ourselves having to discard about of 1/3rd of each bag. This was not only inconvenient but eliminated any cost savings.

I did some further investigation and discovered that Quikcrete's "Premium" play sand had a similar sand graduation (sieve rate) to the paver manufacturer's paver joint sand. It also is screened, washed, and dried. Unlike cheap or the original fluffy play sand, this "premium" play sand has a granular mix to assist in bonding & lock-up. It also has enough sand fines to allow for easy and successful filling of paver joints. 

I do want to say that I am not recommending "all" play sands. My investigation at this point has only concluded that Quikcrete's "Premium" play sand is an acceptable joint sand for your brick paver joints.


At Lowe's and Home Depot, this play sand runs @ $3.50 per bag. This is a considerable savings from the $7.50-$8 / bag for paver manufacturer joint sand bags. I understand that there is a cost for private labels and convenience, but this is an unnecessary cost for clients who can easily obtain an acceptable replacement at a local hardware store.