LJN Blog Posts

We are currently in the middle of two adjacent contracts constructing quays on the edge of the Fal estuary in Cornwall. When we first quoted and tried to gather as much information about quay construction as possible it was difficult to discover much at all. The BS information is based largely on more modern standard construction and concentrates predominantly on the waterproofing qualities of the materials. Using drystone negates much of this and yet has been largely superceeded nowadays despite being very well suited to both marine and riparian constructions.

Using large stones >25kg, (it is necessary that every single stone is of sufficient weight), each stone is selected for an even weight along its length which is placed to allow a narrow face. The stones need to be placed vertically as much as possible, (an uneven pattern can also work), this is due to horizontal stones effectively being able to float on a strong current. The back fill is loose and with an amount of gaps the water can simply flow in and out of the whole base of structure.

Estuarine locations are by far the easiest locations in which to construct on the foreshore. The full force of the sea is usually tempered and flooding is not constricted and as such not fast flowing. Despite this it is essential to ensure the face is able to withstand very strong forces indeed. However the back of the wall face is under a much greater pressure - on high tides, particularly spring tides, the whole of quay becomes waterlogged and the pressure downwards and onto the rear of the facing stone is immense as the tide falls.

The work is incredibly labour intensive, although the localities make up for the hard work. The photos are of the first quay in construction, 46 metres long, which is in an AONB and surrounded by National Trust land; as such the design has to be traditional and the final finish needs to look in tune with the much older quays in the vicinty. A random pattern to the face allows for this easily.BEFORE:

AFTER:

The total cost for the above job came in below £5000.00, and as such it would be impossible to build a timber or concrete construction for the same price. Dry stone is becoming increasingly more fashionable as the prices for the stone become increasingly more competitive against prefabricated products. The sustainability factor cannot be beaten either, the stone for the above came from less than 20 miles away and all other materials were recycled.What is very amusing is to see the different species which utilise the quays in comparison to the dry stone walls.Crabs vs Toads. The final touch is a specialist seed mix for estuarine riparian and coastal headland, with strong rapid establishing grass seeds it is a mix that hardly suits any other type of lawn but will assist greatly in erosion preventative vegetative measures and remediation, (EPV) thus ensuring the longevity of the structure.

Dry Stone walls in Cornwallwww.paysagedurable.com
E-mail me when people leave their comments –

Comments

  • PRO
    Stunning work and cheaper than a patio in this neck of the woods!
  • PRO
    I have to agree - lovely work and totally in keeping with its environment.
  • Thanks for your kind comments - the work has been tough and I think all of our arms are 2inches longer.
  • Total agreement. Hits all the buttons....fabulous example and aesthetic. I should think you are very proud.
  • Fantastic especially for under 5k. How long did it take to build?
  • Thanks for your all comments. The build took just over three weeks. Hats off to Steven Johns and Charlotte Duriez, who seemed to positively enjoy lugging massive rocks around. We are starting a quay on the neighbouring property in the beginning of September. We are hoping to pick up more contracts such as this and the costs of the materials lower the final costs dramatically. Now in this part of the world the natural stone from sustainable quarrying practices, (such as Tredinnick) as well as sustainable timber from local woodlands is starting to match and often beat prefab and imported materials. The only problem is that finish is very localised and as such these traditional looking builds are simply not suited to many locations.
This reply was deleted.

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

Join Landscape Juice Network

Highlighted blog posts

Open forum activity

Andy Pullin posted a discussion
We're looking at buying one of these shredders - any opinions or experience - good or bad?
5 hours ago
Jon Perry replied to Jon Perry's discussion Honda GCV 170
"Yes, loads of people on the forum seem to rate etesias very highly. I just worry about buying second hand. I'm sure you could get a bargain but I guess you could also get a "duffer" with no comeback. I'm not really in a position to risk that. "
6 hours ago
Damian Jones replied to Jon Perry's discussion Honda GCV 170
"How about a second hand Etesia? I bought one for £475 and it’s been fantastic "
6 hours ago
James whitmore replied to James whitmore's discussion Equipment for sale
"Both chainsaws now SOLD
still have the unused weibang that’s going on fleabay and gumtree this week ,   
Thanks "
6 hours ago
Ian Kenyon replied to James King's discussion Seeding after scarifying
"Thanks. It's my first attempt.nlearnt a lot on how much I could improve my presentation style"
6 hours ago
Ian Kenyon replied to James King's discussion Seeding after scarifying
"Buy in bulk bags from Veioli. Yes the Matt knocks off high points and leaves in the depressions"
6 hours ago
Seth Burgess replied to Jon Perry's discussion Honda GCV 170
"I have the Stiga twinclip which is 95% the same as the mountfield. It has the GC 190 engine. And it is an excellent bagger. I dont think the 0.5hp is really going to matter much as my kaaz mower is an even better collector and has a less powerful en…"
7 hours ago
Jon Perry replied to Jon Perry's discussion Honda GCV 170
"Thanks Dave. Good point. I think Mountfield must be replacing the gcv190 with the gcv170 you can get the sp555v with either engine at the moment. Decent pick up is paramount.. I wonder whether the dual blade in the Mountfield actually collects 20% m…"
7 hours ago
Vic 575 replied to Jessica Bateman's discussion Ramps for mower
" You don't say whether you need ramps for hand mowers or a ride on machine. If it is a ride on, then get some proper ramps and don't even think about timber/boards. Apart from potentially and most likely not being strong enough, you will spin wheels…"
8 hours ago
Dave Colton replied to Jon Perry's discussion Honda GCV 170
"The thing that would sway it for me is the basket, the Alko with plastic basket should be the better bagger when wet due to greater air flow vs a fabric bag but the Mountfield does look like quite a good wee mower for price."
8 hours ago
Mr Kieran A Ray updated their profile
8 hours ago
Andrew Betteridge replied to Jessica Bateman's discussion Ramps for mower
"I have a couple of short scaffolding boards they have the advantage of being able to be used as scaffold boards as well as ramps!
If loading something heavy and you feel the need to put a couple of bricks or something else under them around the midp…"
10 hours ago
Tony @SM replied to Jessica Bateman's discussion Ramps for mower
"With respect John, I've had the same boards for years and they have no signs of any weakness, I reckon they'll outlast me! I don't see any more risk of tyres slipping on wood than there is on steel. You just need to use a modicum of common sense.  I…"
10 hours ago
Jon Perry posted a discussion
I'm in the market for a new mower. I have a £600 budget. Probably using for about 2 hours a day on average. I've looked into, and dismissed, battery mowers. I was on the verge of buying an Alko 527 vsh with the tried and tested Honda gcv160 engine.…
12 hours ago
Catherine Miller replied to Jessica Bateman's discussion Ramps for mower
"Another vote for scaffold boards
 "
13 hours ago
Alasdair @ TheGardenService Ltd replied to Anthony Toop's discussion Etesia pro46 belt change
"Thanks guys for this topic. Just replaced the transmission belt on a 2015 Pro51x
Just to add, to undo the central nut I managed to prevent the engine from turning by placing a screwdriver shaft through both clutch plates (large discs just above blad…"
15 hours ago
More…

Honda GCV 170

I'm in the market for a new mower. I have a £600 budget. Probably using for about 2 hours a day on average. I've looked into, and dismissed, battery mowers. I was on the verge of buying an Alko 527 vsh with the tried and tested Honda gcv160 engine.…

Read more…
5 Replies · Reply by Jon Perry 6 hours ago