Dana jobs fail in their own particular ways. The general texture mistakes — bad preparation, no primer, lost wet edges — apply here too and are covered in the texture mistakes guide. These are the faults specific to granule work that we see on Indian sites.
1. Working a dead mix
Dana-binder mix has a working time. Stretching a batch past it — common at day's end — lays granules the binder can no longer grip. The wall looks fine at handover and sheds at the first hard brush. Habit: smaller batches, mixed as needed, leftovers discarded without regret.
2. Topping up with a different grain or lot
Running short and finishing with whatever dana the local shop had prints a visible patch of different grain or tone. Natural stone varies between lots even at the same nominal size. Habit: order the whole job plus reserve from one lot — the arithmetic is in the quantity guide.
3. Guessing the binder ratio per batch
The classic cause of one wall in three tones. Measured ratio, same measure, every batch — a mug nailed to the mixing board outlives any painter's judgement at 5 pm.
4. Laying coarse grain with an unpractised hand
Coarse dana magnifies trowel faults that medium hides. A team quoting confidently for coarse should show you a coarse wall they have done — grain choice and team choice are one decision.
5. Ignoring weather on application day
Full afternoon sun on a hot wall snatches the binder before the trowel finishes levelling; rain inside the cure window washes streaks into the face. Sites that chase the shade around the building and watch the sky get even walls.
6. Patch repairs done proudly wrong
A damaged patch filled with fresh mix in a different lot, feathered into the old surface, reads as a bruise. Good patching uses reserved material from the original lot and squares the patch to natural breaks. No reserve kept? Expect the repair to show, and choose its edges deliberately.
Frequently asked questions
How do I check a finished dana wall before paying?
Brush a low corner firmly by hand — grain should not shed. Sight along the wall in raking light for waves and joints. Look at edges and around openings, where hurry shows first.
The wall sheds a little grain in the first days. Normal?
A few loose granules from the surface, yes. Continuing shed after the cure period is an adhesion fault — raise it while the team is still answerable.