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Landscaping & Gardening

Top tips on all things garden design, including fencing, lawn care, planting and outdoor improvements.

Landscaping & Gardening

In The Garden: Building a Retaining Wall

A retaining wall is a simple and aesthetically pleasing garden feature that allows you to turn steep banks of garden into easier-to-use space. While the safest bet is to ask a builder or landscape gardener to help you to build a retaining wall, it is possible to do yourself.

A retaining wall is a simple and aesthetically pleasing garden feature that allows you to turn steep banks of garden into easier-to-use space. While the safest bet is to ask a builder or landscape gardener to help you to build a retaining wall, it is possible to do yourself.

One of the most important elements is to protect your wood as much as possible from damp, both from the elements, and from the earth that it is retaining. We take a look at three simple steps that you can take to help your retaining wall to last longer. If you do employ someone to do this job for you, make sure you ask them whether they are taking these steps, too.

It’s all about quality

When it comes to choosing the wood for your retaining wall, don’t just consider price and looks. The quality of your wood will impact how long it lasts. Even if there is a wood that looks similar to a better quality one but costs half as much, if you can afford the better one, don’t be tempted by the cheaper version; the chances are that it will last half as long. Ideally, you want to find pressure-treated wood. This is wood that has been specially treated to survive the stressors of garden life. Reclaimed railway sleepers are a popular and attractive, but not cheap, option.

Add a barrier

The best defence is often prevention. Wood that is sitting next to wet soil around the clock is bound to be susceptible to wood rot, so it makes sense that one of the best ways to prevent that rot is to add in a waterproof barrier. One way to do this is to build an inner wall of stones and pebbles that will prevent the soil from coming into contact with the wood. However, a less green but quick, convenient and effective way is to use a tarp of damp proof membrane. This can be stapled to the wood or layered between wood and soil and trimmed back once the wall is completed.

Treat your wood – twice

Even if you buy great quality wood that has already been treated, there is no harm in treating it again. By adding your own coat of wood preservative, you are adding an extra layer of protection, helping your wood to hold off succumbing to moisture for longer. Before you start work, take the time to paint your wood with a good quality preservative so that you can get the most out of it.

Building a retaining wall is relatively simple – if you know how. If you are unsure, you could end up with a mess that is more expensive to fit than the job would have been in the first place! If you are in doubt, contact a couple of local traders to see what they would advise and how much they anticipate it costing. For more tips, follow Trust A Trader on X or Facebook.

Looking for more landscaping & gardening advice?

Find clear, practical answers to common landscaping & gardening questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • Do I need a professional to design and landscape my garden?

    For simple stuff - planting, basic lawn care, a few raised beds - you can often manage it yourself. For anything involving hard landscaping, drainage, retaining walls, or changing ground levels, get a professional involved.

    Badly built retaining walls and poor drainage cause expensive problems. A landscaper will also know which materials will actually work for your soil and conditions.

  • What is the difference between a landscaper and a gardener?

    A gardener looks after your garden on an ongoing basis - mowing, pruning, planting, general upkeep. A landscaper creates the garden in the first place - patios, paths, fencing, decking, drainage, planting schemes, the whole structure. Some people do both, but they're distinct skill sets.

    If you want the garden transformed rather than maintained, a landscaper is who you need.

  • How do I get rid of an overgrown garden?

    It's often more work than it looks. Beyond cutting things back, there may be significant root systems to clear, possibly invasive species to deal with (Japanese knotweed needs specialist handling), and ground prep before any replanting can happen.

    For anything seriously overgrown, professional clearance is going to be faster, more thorough, and safer than tackling it yourself.

  • What time of year is best for garden landscaping work?

    Hard landscaping - patios, paths, decking, fencing - can happen most of the year, though very wet or frozen ground causes delays. Planting is best in spring or autumn when things establish more easily.

    If you're planning something big, book a landscaper in late winter for spring work - good ones fill up fast once the season gets going.

  • What should I do if I have Japanese knotweed in my garden?

    Take it seriously. It can damage buildings and hard surfaces, and some mortgage lenders won't lend on properties where it's present and unmanaged. You're not legally required to remove it as long as it stays within your boundary, but you are responsible for stopping it from spreading to neighbouring land.

    It needs specialist treatment - either chemical treatment over multiple growing seasons, or excavation and licensed disposal. Don't compost it or put it in your general garden waste.

  • What are the benefits of artificial grass?

    The obvious one: no mowing. It stays looking decent all year and doesn't turn to mud in winter, which is a real plus for households with kids or dogs. Modern artificial grass is much more realistic than it used to be and holds its colour well. Worth knowing though: it gets noticeably hot in direct sun, needs occasional brushing, and is made from plastic that can't currently be recycled at end of life.

    It's a great fit for a low-maintenance, practical space - less so if the environmental benefits of a real lawn matter to you.

  • How can I make my garden low-maintenance?

    Cut down the amount of lawn first - it needs more regular attention than almost anything else. Swapping sections for hard landscaping or planted beds with ground-cover plants makes a real difference.

    Pick plants that suit your soil and aspect - ones that are happy where they are will largely look after themselves once established.

    A thick bark mulch layer keeps weeds down and holds moisture. A drip irrigation system on a timer removes another regular task. A good landscaper can design a scheme specifically around low maintenance rather than just what looks attractive.

  • Do I need planning permission for decking, a pergola, or a garden room?

    Decking is usually fine under Permitted Development as long as it's no more than 30cm above ground and doesn't cover more than half the garden. Open pergolas are generally okay - but start enclosing them with a roof and sides and they get treated differently.

    Garden rooms are classed as outbuildings: permitted if single-storey, within size limits, not used as living accommodation, and set back properly from boundaries. Listed buildings are a different matter - any structure nearby needs listed building consent. If you're not sure, a quick inquiry to your local planning authority will give you a clear answer before you spend anything.

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