Does paver sealing prevent weeds, moss, and algae? That is a great question! We would like to be clear about our services and ensure you that we wish to provide you with the best information possible regarding your pavers.
The sealant includes a polymer additive that soaks into the sand between the pavers turning the sand hard; similar to a mortar. This creates an environment that makes it extremely difficult for weeds to germinate and grow.
Our goal is to minimally prevent 90% of future weed growth. However, there can always be certain circumstances that can alter the efficiency of the sealed pavers. There are also a few things that can be done after your pavers are sealed to allow for maximum weed and vegetation prevention in the future. We feel that it is important for you to understand that our process and service is not a remedy for poorly installed pavers (uneven, sunk, misaligned, etc.).
The number one reason weeds, moss, and algae grow between the pavers is due to inadequate or faulty paver drainage mechanisms and/or little to no sun exposure. The inadequate drainage can be caused by low or sunken areas, pavers that were improperly sloped during installation, patios that have stone walls around the perimeter (preventing water from draining appropriately), or even mounded landscape beds that also prevent effective water drainage.
When pavers are not draining properly, these areas remain damp (especially in shaded areas). Airborne organic materials begin to stick to the damp surfaces including pavers and sand joints. Over time, this promotes the growth of moss and algae. Airborne seeds from weeds and grass also begin to adhere to the damp areas. The airborne organic materials and seeds, within these damp areas, create the perfect conditions for germination. The roots then begin to grow in the shallow layer of organic material. We would be happy to address any drainage issues prior to sealing your pavers. The best fix for damp pavers is proper drainage.
How can I minimize the risk of future weeds, moss, and algae growth within my paver joints? Utilizing the following steps, you can have long term success with your sealed pavers.
We appreciate your business, and as always, we look forward to serving you in the future. Utilizing the above steps will increase the effectiveness of your sealed pavers and ensure long term success. We are more than willing to assist with these precautionary steps; please contact us for more information.
This client in Blacklick contacted us originally to help them repair their 15+ year old paver patio, walkway and paver steps at the entrance to their home. Failing pavers steps that were built around the same time the home was built is a very common repair that we’re called out on. The reason is caused during construction of the home. When the builder excavates for the basement, he digs wider allowing plenty of room for the basement wall builder to work. When the basement walls are finished, the builder then pushes loose dirt into this large void. Over the next 5-7 years, this backfill material will settle. So, if steps were built over top of this settling area in the first 5 years, chances are they’ll settle.
We are contacted weekly by homeowners who have decided to hire an unexperienced company to seal their pavers. Sealing pavers is a lot more finicky than sealing a deck or sealing concrete. There are some things that can go wrong, as you’ll see in the pictures below.
Patio and driveway pavers get dirty over time and grow black mold, moss and weeds. Most paver owners think to hire a pressure washing company to clean them or run out to the local hardware store and rent a pressure washer and try to pressure wash the pavers themselves. Pressure washing concrete pavers, especially newer ones, can easily damage the surface finish and we strongly suggest not pressure washing unless you are highly experienced and have the right equipment to pressure wash pavers.
There are many benefits to sealing pavers, but it’s not absolutely necessary. It really depends on your expectations of pavers and how long you would like them to look great. Pavers that aren’t sealed will be more likely to grow weeds in the joints, they will fade and loose their color from wear and UV breakdown, and because most newer paver sealers include an additive that will harden the joint sand it is less likely that you will have settling or shifting caused by joint sand loss.
All that being said, yes you should seal your pavers. Most paver manufactures will tell you that it’s not required to seal your pavers, however, it is highly suggested.
Typically, a customer comes to us requesting to either have their pavers sealed or stabilized with polymeric sand. Rarely does the client know both options exist. So, I wanted to put this informational article to share what the differences are and which is the best for your situation.
In most cases, we prefer to use a joint stabilizing paver sealer over polymeric sand. A joint stabilizing sealer is a liquid product that penetrates into the surface of the concrete paver as well as the sand in the joint giving the paver protection from stains and an enhanced look as well as hardening the sand in the joint. The joint stabilizing sealers come in a natural or matt sheen, enhanced or semi-gloss sheen and a high gloss sheen.
There’s nothing more frustrating than seeing your beautiful paver patio become infested with weeds. Weeds are probably the #1 or #2 biggest concern from potential clients of our new installation division. Because pavers are presented/marketed as an easy installation, they are often installed by DIY’ers or companies with very minimal experience installing pavers. I’ve always said that a paver patio properly installed will have minimal weed growth.