Did you end up cutting a secondary drip kerf on-site to save those eight windows, or did the stone have to come out entirely?

We once had to dry-cut secondary drip kerfs on site across an entire north elevation because the scratch coat ate our clearance. Miserable, dusty mistake you only make once before render thicknesses get highlighted in red on every stone schedule.

Are you typically bumping the overall sill depth across the stone schedule to absorb the build-up, or do you pull the drip groove closer to the leading edge?

Did you end up having to recut the drip groove on site to salvage them, or did the whole batch have to be pulled and re-ordered?

Had to bring a mason back to grind new drip kerfs on-site years ago because our strapping ate up that exact margin. The airborne granite dust alone cures you of ever detailing from the rough substrate again.

Are you holding a strict minimum clearance between the drip groove and that finished lime face, or do you usually add a tolerance buffer for coat thickness variance on site?

Half the imported models I prep have this exact error baked in—the render skin gets toggled on and the deep shadow under the sill just dissolves. If that drip groove can't catch a clean shadow line in a render, it's definitely not clearing the plaster in real life.

Bridging that drip groove is an infuriating oversight because everything looks pristine right up until the first sustained winter rain. Good on you for highlighting this—we still catch stone packages dimensioned straight off the rough masonry without accounting for the multi-coat lime build-up.

That buried drip edge is an absolute classic. The number of times I've seen a pristine lime wash get wrecked in month two because nobody accounted for the scratch coat is depressing.

Seen this catch people out at the jamb returns, too—if the render wraps into the reveal without a clean relief, it bridges the groove right at the corners where runoff is heaviest.

That 20mm buildup catches people out constantly. You only have to see water jump a choked drip groove once to double-check the sill schedule on every job after.

The amount of CAD sections where that drip groove ends up swallowed right inside the render build-up is wild. Those wash streaks are brutal on fresh lime, too.

Had to pay for site-cutting new drip grooves into a dozen Yorkstone sills years ago because a tender drawing measured off the bare block instead of the lime build-up. You only watch water bridge a buried drip and streak fresh render once before that dimension gets its own bold warning box on every detail sheet.

Had to watch a crew recut drip grooves on-site with an angle grinder in Pavia because our section detail referenced the Poroton block instead of the finished scratch coat. Painful lesson in why the dimension string has to terminate at the final plaster line, without exception.