Opus Romano is the large version of the Roman pattern. Four paver sizes form a 1200 × 1200 mm module with exactly twelve stones. Four joints never meet at one point, and no joint runs across the whole module. That is why the surface looks as random as natural stone even though it follows a fixed plan. The preview shows four modules, and the rotate button turns the module by 90°.
The four sizes and their quantities
| Size | Dimensions | Per module | Per m² |
|---|---|---|---|
| Small | 200 × 200 mm | 4 | 2.8 |
| Medium | 400 × 200 mm | 2 | 1.4 |
| Large | 400 × 400 mm | 4 | 2.8 |
| XL | 600 × 400 mm | 2 | 1.4 |
Together that is 8.3 pavers per m², without joints or waste. Many manufacturers sell the sizes as a mixed layer or pallet. Check that the mix matches this plan. Otherwise you end up with spare stones of one size and a shortage of another.
Where does Opus Romano pay off?
The large module needs room. On a patio from about 15 m² or in a courtyard it works well, because the eye barely picks up the repeat. On a narrow path only a strip of the module remains and cuts dominate. For smaller areas with a similar look, the four-size ashlar pattern with its smaller repeat is the better pick. The ashlar guide compares both.
Recreate the template in PatioPlanner
The “Open template in planner” button selects “Mixed format (various sizes)” and the Opus Romano (12 stones) pattern.
- Create your surface. If the patio has a bend or a clipped corner, draw the outline as a polygon.
- Pick the start corner. Whole modules belong along the edge people see most, usually the house wall or the patio door.
- Enter a waste allowance. The shopping list puts each of the four sizes on its own line, split into full stones and stones to cut. With that list you can reorder one size instead of buying a second mixed pallet.
- Save the project and print the plan. “Print” and “Export as PDF” put the drawing and the shopping list on landscape A4.
- On site, start the laying guide. It counts “Stone 1 of …” and highlights each stone in turn. Voice or Wave control lets you move on without touching the phone with dirty hands. The upcoming cuts list tells you which stones to prepare at the saw in one go.
The guide saves the most time with Opus Romano. With four sizes it is easy to grab the wrong stone, and a mistake often only shows three rows later.
Tips for laying
- Sort the pavers by size before you start and keep them within reach. That saves more time than any laying technique.
- Dry-lay the first module and measure it. If it does not come out at 1.2 m with your joint, either the paver size or the joint width is off.
- Set the curbstones before paving. The shopping list works out curbstones and mortar for the perimeter.
FAQ
How many pavers do I need for 20 m² of Opus Romano?
Just under 14 modules in theory. That is about 56 small, 28 medium, 56 large and 28 XL pavers, without joints or waste. The planner’s shopping list gives the exact count for your outline.
Is Opus Romano hard to lay?
It needs more attention than running bond but no special tools. Most mistakes come from swapped sizes. With a plan that shows the next stone one at a time, the pattern is doable for DIYers.