There are three main causes of block paving drainage problems:

Block Paving Drainage Problems – Laying on a Concrete Base

If there’s a fall (slope that drains either naturally or to installed drainage) blocks can be laid and there shouldn’t be a problem. 

However, if there’s isn’t a fall (so water doesn’t drain away) then water will simply sit underneath the blocks and this will cause organic growth (weed and grass) and worse this will make the blocks lift. 

The only remedy to this problem is to resinstall the driveway. 

Nobody wants this problem (see below) do they?

Block Paving Drainage Problems – Minimal  Aggregate (stone) Sub Base

As unbelievable as it seems it has been known for some block paving driveway installers to lay block paving on a bed of sand without first installing a suitable sub base!

This type of shoddiness is less common now but for many years a lot of block paving driveways were laid like this.Improved block paving manufacturing, better training and increased levels of professionalism have all helped to put an end to this.

But it still happens so be in the know!

These types of installation are easy to spot. They’re the ones with large ‘ruts’ where a vehicle has been rolling over the same spot. Over time the ruts get deeper and the blocks start to break away from each other.

Driveway Channel Drain with Galvanized Steel Grate

Designed to efficiently manage standing water in driveways, patios, and other outdoor spaces, this durable drainage system combines galvanized steel grates with sturdy recycled plastic channels for lasting performance.

The interlocking channels simplify installation, seamlessly snapping together without screws, while the grates securely hold under heavy loads—rated for up to 10,000 pounds.

Maintenance is hassle-free thanks to snap-in grates that allow quick access for debris removal, and the built-in outlet adapts to standard drainage pipes for flexible routing. Its robust construction ensures reliability through seasons, effectively redirecting water to keep surfaces dry and protected.

Practical yet unobtrusive, it offers a sustainable solution for homeowners seeking a low-profile, high-capacity drainage option.

Premium Trench Drain Channel

Designed for residential water management, this shallow trench drain system combines galvanized steel grates with adaptable snap-lock channels, offering a streamlined solution for driveways, walkways, and patios.

The modular design allows effortless installation, with interlocking channels that create 16.5 feet of linear drainage and customizable 90-degree turns for flexible layouts. Integrated bottom outlets and secure end caps simplify connections to existing drainage systems, while the pedestrian-rated grates prioritize durability underfoot.

Lightweight yet functional, the snap-in components enable quick adjustments and maintenance without tools, ensuring hassle-free customization. Ideal for homeowners seeking a versatile, value-driven option, its balance of practicality and design makes it a practical choice for managing runoff in tight or curved spaces.

Channel drainage for Patios

If you are constructing a patio the discreet fitting of Slot drainage is the way to go. These are also suitable for blocks, too.An enhanced visual feature of these types of linear drainage channels are they appear as a single line along the surface of a patio or driveway (rather than a grill.)

Block Paving Drainage Problems – Poor Fit Channel Drainage

Linear drainage (channel drainage) systems are used extensively on many driveway installations. 

And remember: further to SUDs legislation permission is needed if water drains to the public highway. 

Therefore many block paving installations now have channel drainage fitted as standard. The types of channel drainage range from block that blend in nicely, like below:

Slot Channel Drain with 304 Stainless Steel Grate

Crafted for efficient water management in both residential and commercial settings, this trench drain system pairs durable HDPE channels with corrosion-resistant 304 stainless steel grates, built to withstand extreme temperatures and harsh environments.

Its triple-slot design features narrow 0.2-inch openings that minimize debris buildup, reducing maintenance while ensuring rapid water flow. Reinforced ribs along the base add stability, making it suitable for patios, pool decks, and non-traffic areas, while the sliding connection system simplifies installation and prevents leaks.

Flexible configuration options—including adjustable outlet adapters and compatibility with standard drainage pipes—allow seamless integration into existing setups. Easy-to-remove grates and a modular design enhance practicality, offering a low-profile, long-lasting solution for discreet and reliable surface.

Read more on soakaways

At ImproveOutdoors we often hear stories of shoddy work.

Surprisingly (or not) the main source of this are often those looking to make a quick buck with property renovations.

It’s hardly ever homeowners simply looking to improve the look and value of their home.

This type of poor practice reflects badly on the majority of driveway installers that create marvelous driveways.

And there are many talented professionals out there.

Most homeowners are looking to get a decent installation and avoid future headaches such as their driveway surface sinking or ruts appearing.

Here at ImproveOutdoors we take the time to explain the pros and cons of driveway surfacing products. 

This helps to enhance the reputation of the driveway industry and bring to light instances of poor practice.