About the Landscape Juice Network

Founded in 2008. The Landscape Juice Network (LJN) is the largest and fastest growing professional landscaping and horticultural association in the United Kingdom.

LJN's professional business forum is unrivalled and open to anyone within within the UK landscape industry

LJN's Business Objectives Group (BOG) is for any Pro serious about building their business.

For the researching visitor there's a wealth of landscaping ideas, garden design ideas, lawn advice tips and advice about garden maintenance.

PRO

If there hasn't been a sufficient effort to accommodate expansion joints in a building or landscaping project, there may significant aesthetic or structural problems at a later date, whereby substantial and expensive remedial action may be needed to rectify any damage.

Expansion of materials such as wood, concrete and metal is common during periods of extreme temperature, as the materials expand and contract, pulling and pushing forces and all directions: damage is cause in areas of weakness and vulnerability when these materials can no longer move within their normal tolerance.

 

Making good use of old surfaces

It is often the case where new projects - such as pathways, patios or features - are built directly on to the top of an existing concrete base: examples of this may be a site of an old building, farm yard or roadway - where it may be financially prohibitive or impractical to remove the base.

Using old surfaces as a new base makes sense because there is normally a great deal of expense and preparation that goes into creating a sub-base where the visible part of the project is set.

Historical stress fractures

Old bases are notorious for fractures and fissures as they've settled and moved over the years - often as a result of the lack of a suitable expansion joint or because of poor sub-base compaction.

Chances are, although the base might show significant signs of movement or surface damage, further settlement is unlikely. However, lateral (expansion/contraction) movement caused by heat and cold, could cause any minor movement as forces transmit through any new structures that might be built on top.

If it's intended to build on an old surface, there's one simple but effective and relatively inexpensive technique that can be applied as a safety net and insurance against damage.

Plastic and geotextile membrane.

The following makes the assumption that any new construction has been planned to fit within the existing space and there is sufficient height to be able to build up and there is to be a further concrete or sharp sand and cement mix sub-base to be laid on top before the final surface.

Clean off the old base. It's not necessary to scrub clean but all loose material, including soil and stone, must be brushed away.

If it's a patio or pathway that is to be laid, all that will be needed is two separate sheets of Damp Proof Course (DPC) grade plastic sheeting.

Lay the first sheet out fully over the old surface (if it's an odd shape then don't cut because the surplus can be trimmed with a Stanley knife or scissors afterwards) making sure there are no folds, wrinkles or bubbles.

After this, lay the second sheet on top of the first - again making sure there are no folds, wrinkles or bubbles.

Safety

Be warned: at this stage, walking on the surface, especially if footwear is damp or there has been some rain, will be hazardous due to the slippery surface.


A geotextile membrane may be utilised directly on top of the plastic sheeting to protect the plastic.

Now continue to construct the new project in your normal way.

The above method stops the two surfaces bonding and at the same time, allows movement of the two surface independently and ensure that stress fractures are not transmitted up through the new surface.

Experience: here's an example of a project I rectified after another firm had built a stone pond on top of an exiting base.

You need to be a member of Landscape Juice Network to add comments!

Join Landscape Juice Network

Email me when people reply –

Industry Jobs

Experienced gardener

EXPERIENCED GARDENER Full-time or Self-employed – Company based in Borehamwood, Hertfordshire Salary up to £25k, or self-employed £11/hour starting hourly rate, dependent on experience   The Role: Working as part of a team completing soft and hard landscaping duties for clients. Duties can include: • Hedge cutting • Weeding • Planting • Pruning • Border

Head Gardener for Private Estate

The role of the head gardener is the overall maintenance of the gardens, lawns and grounds. When the opportunity arises, parts of the gardens might be redesigned and replanted. The gardens form an essential and much loved part of a private estate. Main Responsibilities: Full management of 2 part-time assistants, including day-to-day supervision and working

Self Employed Gardeners

Grasstex are currently seeking to engage the services of local (West Sussex / South Surrey) gardeners. If you are a new start up looking for more work, or an existing business with the odd spare day to fill, we may have something for you. We have various types of work available to match your skills.

Gardener

Gardener required I run an established garden maintenance and soft landscaping business based in North London. I have a record of working in the industry and now work with fellow colleagues on domestic gardens. I’ve spent many years studying and training at Capel Manor. I’m looking to grow my business by taking on additional help

Trade green waste centres

LJN Sponsor

Advertising