landscapingmasonrypaving
I'm looking to lay a new section of Belgium blocks to border a new flower bed. However, the existing Belgium blocks have a joint connecting each block that protrudes outward. It is not clear to me whether this is a spacer block or perhaps mortar shaped using a jointing tool. Is there a known technique to match the style of the existing edging shown below?
The blocks you linked to are more for decorative purposes; one or two courses around flowerbeds or trees. What you're going to need for 3'-4' of retaining wall is something like this:
This is engineered block from http://www.anchorwall.com (I'm not affiliated; it was the first thing that came up when I Googled "Retaining wall blocks"). As you can see, they (and most other providers) can put that "hand-chiseled" look on just about any type of manufactured stone, and color it to your liking, so you should be able to get pretty close.
Understand that a wall like the one in the picture will probably run you between 15 and 20 grand, installed. On top of the blocks and the labor, there is a LOT of prep work that goes into building a wall like this. You have to consider grade on both sides of the finished wall, water drainage (water will sink into the soil and collect behind the wall), as well as build a proper foundation beneath grade (this particular wall represents maybe about 20 TONS of stone, so it needs a very solid base of compacted crushed gravel to prevent shifting and sinking). And yes, you need all of this, because if this wall moves, the soil behind it moves, and then whatever that soil is supporting (like your house) will move.
First of all, I hope the mortar wasn't concrete. Concrete and mortar, while related, are two different things. Mortar is meant to be softer and give (rather than the brick or stone giving and thereby cracking).
The proper solution is to re-tuck-point the joint. That means chip/grind out the old mortar and put new mortar back in.
Alas, mortared steps are a maintenance nightmare and you'll likely be doing this forever at least bi-annually. I eventually caved and tore out our aging brick stairs (meaning half the brick was spalling and flaking, and weeds were in every joint) and replaced them with colored concrete. Not quite as rustic, but a whole lot safer (the old bricks were slick) and maintenance free.
Best Answer
That appears to be what's called a "beaded" mortar joint. It's tooled from the mortar. Tools and videos can be found by searching using that term.