Tag Archives: Moles

A Bigger Splash – weeks twelve to fourteen – story of a swimming pond for a garden designer

 
Finally starting to look like a pond, although the water level will eventually be up to the top of the liner right the way across.
 

I know, I know – it’s been three weeks since an update. The principal reason for this was that not enough had happened after two weeks. And the principal reason for that was that some of the gang were pulled away on to other sites to do something a little more productive. But it never ceases to amaze me what a difference it makes to a site when the turf goes down. It suddenly changes in one go from a landscape site to a garden.

The molemesh being installed just below the turf.

As you can see from the photo, we incorporated the famous ‘molemesh’ as it went down – fingers crossed. This allows us to share the lawn with the local mole population on the basis that they agree not to make any molehills. We have a signed agreement with the moles to this effect.

The new line of the path

The line of the stepping stone path was ‘adjusted’ (that’s a great word for lifting and relaying 11no 115kg slabs of stone) to a slightly sharper curve, which we feel works a lot better. In fact we are delighted. Which is just as well, ’cos they sure ain’t moving again! The grass will be laid between the slabs at the very end of the project, once we have finished wheeling stuff down there.

We had a minor leak, which the liner guys came back and fixed for us. Note to self – make next pool a simple shape. The leak was luckily in the most accessible part of the pond, in trying to install the liner around the concrete buttresses for the metal edging.

Marginal planting underway

The planting of the marginals is happening at the moment – see photo. The beds are first filled with special soil, mixed with light expanded clay aggregate balls to bulk it out (LECA, or Coco-pops as my sons call it). The plants are then carefully planted and a sealing layer of clay is placed over the top. Finally, a thin layer of limestone grit (otherwise known as cat litter by my sons) is laid over the surface. We have positioned some slabs to act as standing points within the lower beds for maintenance access. The lower beds are planted with lilies and other nutrient hungry plants. The upper beds are mostly ornamental. When complete, the water level will cover all the beds to the top of the liner – the pool is still filling at the moment.

 

Finally, it is starting to look like a garden! The view from an upstairs window.

It is such a huge relief to see green things arriving after so long with just mud, concrete and stone. Even the dogs have cheered up with the lawn going down, although they can’t understand why they are not allowed on it.

And some of you may have picked up from twitter that during that really hot bank holiday weekend, we had an inaugural swim in the pool (only about one-third full at that point). It was freezing, but felt great!

Just two weeks left to go now, and almost there… (I keep saying that, don’t I?)

A Bigger splash – weeks eight and nine – story of a swimming pond for a garden designer

 

The completed liner for the swimming pond, looking towards the path end. The skimmer pit is in the foreground.

As of Friday night, the installation of the liner is finished and the pool is (hopefully) watertight.  I will resist all the obvious puns regarding liners and launching. Suffice to say that although we didn’t crack any bottles of champagne on the ‘bow’ of the pool, we had a small celebratory drink at what is after all a landmark in the construction.

Detail along the sleeper wall. The liner is trapped between pieces of timber and then sealed.

You might remember from (much) earlier posts that we decided to go for polypropylene rather than PVC partly on the grounds of it being manufactured in the UK, but also because it is a lot less environmentally damaging in manufacture. My concern with this was that it was very stiff and might look a bit ruckled following installation. I needn’t have worried. The appropriately named Tim Pool (yes, really) who is doing the installation of the liner for us did a fantastic job with almost no creases or ugly lumps. It did take quite a lot longer than we expected (like most things on this job), but the result looks great. I have posted a couple of pictures of some of the details as well as the main photo. The marginal beds with curves on both sides were particularly difficult. To seal the liner against the sleepers was tricky – we don’t like to make things easy for ourselves – we used a chunky piece of larch that we used to secure the liner against the timber sleepers and then enclose in liner. This stops the liner tearing against the fixings once loaded with water.

Similar to the timber detail, but using metal edging.

On the lawn side we used a similar method with a strip of metal bolted to the metal edging, which was in turn secured in concrete haunching. This may all seem a bit belt and braces but the pull on the liner once it is full of more than 200 tonnes of water is huge.

Although the rain has made working on the lawn grade difficult, we have made progress towards final levels. So much so that I am now beginning to think we might not have enough subsoil and topsoil! All those enormous piles have gone – I can’t quite believe that all the calculations were right.

Hopefully an end to these...

What I really cannot face is the incessant battles with the local mole population which has gone on for the last six years. This peaked when, on our return from our summer holiday a few years ago, we were confronted 40 molehills on the lawn. My heart sank. I spent 3hrs or so on my hands and knees opening the tunnels and burying all the soil so the lawn was green again. Next morning: ten fresh molehills – this was war! We tried everything – flooding the tunnels, battery operated sonic devices, solar powered devices, traps, with limited success. The ultimate indignity was finding a sonic device toppled by a fresh molehill – a sort of moley ‘two-fingered’ response. The dispute as to whose lawn it was dragged on for several years until I recently solved it (temporarily) by digging it all up. We had to find a more permanent solution by which we could both share the lawn. After a lot of research, we have come down in favour of a German product (suggested by Jens in our design office) which allows the moles to tunnel beneath the lawn but prevents them producing molehills. An honourable compromise that should restore peace. You can get details from Harald Unger at http://molebarrier.com/3.html. It is installed about 50-70mm below the surface of the turf. If I never see another molehill, it will be worth it.

From now it is a sprint to the finish. Marginal beds in the pool to be filled and planted, plumbing completed, paving laid, pool filled, lighting to be installed, lawn laid and decking constructed (both underwater and outside the pool). Soon there will be no more mud in the house…