Block Paving Water Drainage

What Causes Block Paving Drainage Problems

While block paving is a homeowners’ favourite for its visual appeal, most people tend to overlook the potential drainage problems that can occur with a block-paved driveway. These problems can be addressed before you have to replace your expensive pavers.

The problems most homeowners face when trying to have a driveway are easily overcome by working with the right paving contractor

A gentle slope on the driveway will allow rainwater to drain off easily and keep it from pooling underneath your driveway stones. If water gets on your driveway and you don’t take action to remove it, the pooling water will allow weeds to grow and will damage your driveway, requiring a costly repair.

If you’ve been frustrated by repeated flooding in your driveway, you’re not alone. Most driveways are designed with poor grading which can result in overflow during high water events. What goes in must come out. By grading for drainage, water has a natural path to flow through. The goal of grading is to drain all surface and subsurface water away from your home.

Bad Grading

Bad grading on your driveway will cause water pooling. As the water pools the chances of flooding and foundation problems are increased dramatically to avoid this slopes for driveways should be built properly and drain efficiently. They should not interfere with adjacent sites.

When designing your new driveway, you need to consider how water will drain. Driveways can be washed out during heavy rains and sustained periods of snow melting. To avoid damage to your home and vehicle, you need a driveway that is designed right for your property.

Minimal Aggregate Sub Base or Stone

As mind-blogging as it seems, it has been renowned for a few block paving driveway companies to lay block paving on the sand bed without setting up an appropriate sub-base. Today, this kind of shoddiness is less prevalent. However, many blocks driveways, especially in the UK, were installed like this for many decades. This issue can be addressed by:

  • Enhanced block paving manufacturing
  • Improved levels of professionalism
  • Better training can help end this issue.

Poorly  Fitted Drainage Channel

Slope drainage systems are increasingly being used as an established process in paving driveway foundations for block paving setups. Further to SUDs, legislation authorization is required when water drains to the street. So, a lot of block paving setups today come with channel drainage installed as standard. The kinds of channel drainage range from blocks that blend adequately. Sad to say, there are many kinds of cheap drainage systems available online and offline stores. These inexpensive forms of channel drainage curl and bund and don’t have big weight-bearing capabilities. 

Growth of Weeds

Another leading cause of blocks issue is weeds start to develop in the joints. These weeds, if taken for granted, can worsen the condition of block paving. 

This issue can be solved with ease by making use of polymeric sand or special sand. Just put these sands in the joints, and that’s it. It can stop weeds from cultivating.

This fine sand is mixed with silica or any type of additives that create a binding agent when combined with water. Instead of loose sand that weeds could develop through, this type of sand will lessen the number of weeds that breakthrough. On the other hand, if not used properly, this can also pose an issue.

There are many whole blocks failures with mistakenly installed polymeric sand. Once installed in an inappropriate manner, it might not stay put, which leaves nothing in joints. This can result in your block with lots of weeds.

Another solution is the setting up of geotextile fabric, a type of material with high tensile strength, set up at the bottom of the blocks. This acts as a fence to any weeds breaking in from the soil below. This also strengthens the bottom of the patio by serving as a bridge on top of soft spots. 

On some occasions, weeds may be breakthrough from seeds, which have blown above the patio; applying the elements mentioned above can get rid of or stop the growth of the weeds. 

All the causes of block paving issues come down to inferior construction methods. They are issues that could have been mitigated or even get rid of entirely, just if the yard was erected right in the first place. It is also vital to conduct maintenance work.  Taking for granted, such maintenance works can have a considerable effect on yearly expenses. If you don’t know about this, there are companies out there that offer this kind of service.

How to Avoid Poor Drainage on Your Drive Pavement

Almost every homeowner in the UK has had to cope with the drive pavement drainage issue at some point. It doesn’t matter if the situation has resulted from a lot of rain events in the season and not sufficient pitch to the backyard to efficiently guide the it away from something else; there are ways on how to avoid these issues.

Putting Slope and Placement Can Avoid Poor Drainage

The two most reliable ways to combat poor water drainage issues on drive are slope and placement. When setting up a new walkway or driveway, it must be put in an area, which has good drainage. Avoid putting the driveway in a low-lying place or a spot where it usually flows during a storm. It’s best for your drive to placidly slope away from home so that if it rains, it will flow to the street.  Grading might be needed to obtain the best slope; however, it all depends on your property.

Installing Driveway Drains

For some homes, most particularly those which are installed below road level, it is hard to address poor drainage system with correct slope and placement alone. So, in this case, you need to consider setting up a driveway drain. A  French drain or also known as trench drain, can be set up where the driveway joints the garage. This kind of channel is narrow and long and must run the whole size of your driveway. You must cover the driveway channel using a metal grate to avoid debris that can block the pipe. However, if your home is built in a rainy climate, think of setting up many trench drains at diverse points along the driveway. Trench drains are available in various styles and designs, so enhancing the appearance of your drive pavement. There are also small site drains ideal to use in some parts of your drive where there are wet pools.

  • Avoid Poor Drainage By Installing Aggregate Base

Proper drainage keeps the water flowing. Setting up an aggregate base will let the base layer be stable, tough and quickly drain from your pavement. However, sometimes, this is not enough. A sub-grade made of clay can prevent it from draining. So, in some cases, it is ideal to set up a 12’-18 inch drainable sand layer under the base layer to boost the drain ability of supporting materials.

  • Install Dry Creek Bed for a Functional Drainage on Drive Pavement

Some drainage issues can lead to erosion areas in the driveway where too much downspout water appears from pipe openings or daylights. You can avoid this issue by setting up a dry creek bed. This is effective in carrying the water off. Most often, these are ornamental designs, and you can put in a beautiful landscape to your drive pavement. You can use big boulders and river slick for a more natural look.  This may cost you a lot compared to setting up a catch basin; however, to move too much water from your pavement, it is ideal to have it flow across the surface in a natural way rather than below the soil, where blocking issues could take place.

  • Landscaping Swales Work Wonders

In case the land on one or both sides of the drive slopes down to your driveway, landscaping swales is considered the best solution to poor drainage. A landscape swale is a low and superficial depression that is broader than it is deep. So, making a swale along with single or both sides of the drive will give a place for water to gather as well as re-enter the groundwater. What is more, this also keeps it draining off the hillside from going down to the driveway and flooding the drive pavement, garage, or the whole area. You can landscape swale to appear like a creek bed that has water-loving ferns and river rock as well.

  • Search for Any Indications of Trouble to Avoid Poor Drainage

Issues with drainage systems are often are not totally noticeable until it is too late. But, if homeowners take the time to totally inspect their homes or property might notice some telling signs of poor drainage.

  • Call an Expert to Avoid the Issue From Getting Worse

If you believe that you are facing poor drainage on your home entrance and don’t know what to do, you can call an expert to help you out. It is quite overwhelming if the thing in your home is not working the way they should be, so get rid of the stress by just calling or hiring an expert to assess drainage issues.

How to Install Driveway Drain Channel

Setting up a channel drain is a simple and cost-efficient way of dealing with issues on driveway drainage, and it is so simple most of you can do it without help. So, in this guide, you will know the basic installation methods to assists you set up a successful drainage system in the pavement or driveway.

Safety first!

When doing an installation, you need to wear appropriate safety protection all through the whole process.

Step by Step Process

Planning and Preparation: Choose where the channel drainage is going to be set up. Keep in mind that the channel drain will have to discharge, and commonly channel drains release into the primary drainage system through a pipe union end cap. A lot of channel drainage products available come with pop-out parts, which fit a typical drainage pipe.


Make a Trench: First, you need to dig a trench out of the ground and make sure it is deep to fits neatly and appropriately the channel drain and reaches the surface, two millimeters under the surrounding flooring with an additional 100 millimeter under for concrete application.

Assembling Drainage Channel: Make sure you have the proper lengths of channel drainage ready for set up, together with any needed parts like a silt trap. Also, ensure the pre-created outlet has been trimmed or cut out. Your next step is to make sure all the required end cups have been fixed prior to assembling your drainage channels.

Put Layer of Concrete: Put in a layer of concrete, preferably ten millimeters think into the base of the trench. You can substitute this with compacted fill just in case the channel is only utilized in place of pedestrian traffic.

Slot in Drainage Channel: Lower your channel drainage into the trench, making sure the outlet connects as well as seals to the pipe. You can use a mallet to press the drainage into the trench but do it gradually. Then add concrete or backfill around the drainage channel run.

Permeable Paving For Driveways (Alternative)

A driveway material choice is often solely based on the appeal. But, if you want to avoid poor drainage, you may need to consider permeable pavements. This type of walkway allows water to flow through openings or voids and go back to the soil underneath. Sometimes called porous pavements, a permeable surface significantly lessens runoff, thus lessens the chance of flooding. There are lots of permeable paving choices which are able to handle driveway traffic, such as permeable, grass, and pervious pavers as well as gravel.

  • Lessen water in a storm drain: If it rains, it goes down the channel into a sewer system that can get overstressed in a main storm event. A permeable block paving helps in reducing the level of water going into a storm channel and eases the strain on sewer infrastructure.
  • Keep out Pollutants: Sewer water goes into rivers, lakes, and streams, carrying with it toxic pollutants like chemicals and oil. Permeable enhance wet quality runoff by filtering out pollutants prior to getting to the waterways.
  • Assist meet limitations on an impervious surface: Municipalities are putting restrictions on the impermeable surface space you’re permitted on your home. With a permeable paver, you can have a big patio, driveway, pool deck, and driveway and save a considerable amount of money. 
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