Discover the common drainage mistakes homeowners make when installing decking, patios, gravel, and artificial grass, and how to avoid them.
Summer is here. The sun is shining (occasionally), garden centres are busy, and homeowners across the country are transforming their outdoor spaces.
New patios. Artificial lawns. Raised beds. Composite decking. Outdoor kitchens. Garden rooms.
But amid all the excitement of creating the perfect garden, one important feature is often forgotten, hidden, or accidentally buried altogether…
Yes, you’ve guessed it….. Your drains.
At Happy Drains, we regularly visit properties where a beautiful garden makeover has unintentionally created a drainage problem. What looked great on completion can quickly become a headache when heavy rain arrives, a blockage develops, or access to underground pipework is suddenly needed.
Here are some of the most common garden drainage cover-ups we encounter.
Decking Over Manholes
It happens more often than you’d think.
A homeowner installs a lovely new deck, creating the perfect entertaining space for summer BBQs and family gatherings. The only problem? The inspection chamber or manhole cover disappears underneath it.
Out of sight, out of mind.
Until the day there’s a blockage.
Suddenly what should have been a straightforward drain inspection becomes a much bigger job involving lifting boards, dismantling sections of decking, or in some cases cutting access holes.
If you’re planning decking, always make sure manholes remain accessible. Recessed covers can often be installed, allowing access while maintaining the appearance of the deck.
Artificial Grass and Real Drainage Problems
Artificial grass has become hugely popular in recent years. No mowing, no mud, and it looks green all year round.
What’s not to like?
The issue comes when drainage features are covered, blocked, or ignored during installation.
We’ve seen inspection covers buried beneath turf, gullies covered over completely, and drainage channels obstructed by poorly fitted edges.
When water can no longer reach the drainage system effectively, puddles begin to appear. And when access is needed for maintenance, finding the chamber can become a game of garden archaeology.
Before laying artificial grass, make sure all drainage points are clearly identified and remain accessible.
Raised Patios Raising More Than The Patio
Patios are one of the most popular summer improvement projects. However, raising ground levels can create unexpected drainage issues.
When a new patio sits higher than the original ground level, existing gullies and drainage points can become buried or partially blocked.
We’ve attended properties where homeowners have unintentionally paved over inspection chambers or created low spots where rainwater simply has nowhere to go.
The result?
Standing water, flooding during heavy rain, and sometimes water finding its way towards the property itself.
Good drainage design should always form part of any patio project, especially where levels are being altered.
The Gravel Trap
Gravel can look fantastic. It’s affordable, attractive, and great for creating low-maintenance areas.
But gravel and gullies don’t always make good neighbours.
Over time, loose stones migrate. Rainwater washes them around. Garden maintenance moves them even further.
Eventually, drainage channels and gullies can become partially or completely blocked by gravel.
We’ve even found gullies completely hidden beneath decorative stone, making routine maintenance almost impossible.
If you’re using gravel around drainage features, consider installing edging or protective grilles to keep everything where it belongs.
The Hidden Cost of Hiding Your Drains
Most homeowners don’t intentionally cover drainage assets. It simply happens during improvement works.
The trouble is that drains, gullies, and inspection chambers serve an important purpose. They provide access for maintenance, inspections, and emergency drain repairs.
Cover them up, and a simple blockage can become a much larger and more expensive problem.
Before starting any garden project, take a few minutes to identify:
- Inspection chambers
- Manhole covers
- Gullies
- Drainage channels
- Surface water drains
Your future self may thank you.
A Quick Summer Drainage Check
While you’re enjoying your garden this summer, it’s worth asking yourself:
- Can you still access all your manholes?
- Are gullies clear and visible?
- Does rainwater drain away properly?
- Have recent landscaping projects affected drainage routes?
- Do you know where your drains actually are?
If the answer to any of those questions is “I’m not sure”, it might be worth investigating before the next summer thunderstorm arrives.
A beautiful garden and good drainage should work together, not compete with one another.
If you’re planning a garden makeover, or you’re concerned that drains may have disappeared beneath a previous project, Happy Drains can help. From CCTV drain surveys to drainage tracing and inspections, we’ll help ensure your outdoor space looks fantastic above ground and functions properly below it.
Best,
David & Will