How embedded thin brick systems work (and what a ledge is)

The finished wall reads as masonry

An embedded thin brick wall looks like a brick wall because it is faced with real fired brick. The difference is how it gets built. Instead of a mason laying units one at a time, the brick gets cast into a concrete panel at the plant. When the panel ships and gets set, the brick is already there, mortar lines and all.

That means the crew on site sets panels with a crane. They are not standing on scaffolding laying brick in the weather. The brick work happened indoors, at the plant, under a roof, where it is easier to keep quality tight and stay on schedule.

How the brick gets into the panel

The system starts with a rubber formliner. The liner has pockets shaped to hold each brick and to space the joints. A worker sets thin brick into those pockets, face down. The brick sits in the liner the way it will sit in the finished wall.

Then the liner goes into the form. Concrete gets poured over the back of the brick. The concrete grabs the back of each brick and locks it in. When the panel cures and the liner strips away, the brick face is exposed and the concrete between the brick reads as mortar.

This works for precast panels made at a precast plant and for tilt-up panels cast flat on the slab at the site. Either way, the brick is embedded in the panel, not stuck on after the fact.

What a ledge is and why you do not want one

Here is the part that separates a good job from a sloppy one. When the liner does not seal tight against the edge of each brick, wet concrete finds the gap. It creeps up along the brick edge and hardens there. That thin shelf of concrete along the brick is called a ledge.

A ledge is a problem for two reasons.

• It looks bad. A ledge shows up as a rough smear of concrete riding up onto the brick face. Instead of a crisp line where brick meets mortar, you get a fuzzy, uneven edge. On a whole wall it reads as messy.
• It can trap water. That little shelf gives water a place to sit against the brick. Sitting water is not something you want on any wall, and freeze thaw cycles make it worse over time.

So the goal is simple. Keep the concrete off the brick face and off the brick edge. That is what a good seal does.

A good seal gives you a clean mortar line

When the liner seals to the brick the way it should, the concrete stops right where the mortar joint should be. The brick face stays clean. The joint reads sharp and even. From across the parking lot it looks like a brick wall a mason spent a week on, because the line between brick and mortar is crisp.

Getting that seal is about the liner fitting the brick. Brick is not perfectly uniform. It comes out of the kiln with small differences in size, shape, and texture. If the liner only fits a perfect brick, then every brick that is a little off leaves a gap, and every gap is a chance for a ledge.

Where Advanced fits

Advanced makes two embedded brick systems, Solocast and Flex2Fit. Both cast the brick into the panel the same basic way, brick in the liner, concrete over the back, clean face when it strips.

Flex2Fit is the one built for brick that is not uniform. It is designed to seal around brick that varies in size and shape so you still get a clean line with no ledge. That matters because real brick varies, and you want the system to handle the brick you actually have, not the brick in a catalog photo.

If you are speccing brick and want it cast into panels, the short version is this. The brick installs in the plant, in the panel. A tight seal keeps concrete off the brick and gives you a clean mortar line. No ledge means no smeared edges and no shelf holding water. Your rep can walk you through which system fits your brick and your panel layout.