A stone veneer over concrete is the process of affixing stone to existing concrete with mortar. At Boulder Stonecraft we use concrete bonding adhesive between the existing concrete and new mortar to ensure a strong bond, and metal reinforcing wire attached to the concrete. We also use a steel ledge at the bottom of the face stone to hold it in place if there’s no exiting concrete lip or support under it. All of this prevents most of the issues that stone veneer over concrete faces as it ages, with stone peeling off or the vertical faces falling off as the concrete naturally shifts over time.
There are several design options with flagstone. They essentially break down to pattern and color, with many different patterns and colors available.
Pattern: Breaks down as follows
- Random square cut arrangement. This is made with square and rectangles of various fixed dimensions, typically 6″x 6″, 6″ x 12″, and 12″ x 12″, or 1 ft x 1 ft, 1 ft x 2 ft, and 2 ft x 2 ft, depending on the size of the patio/walkway we are veneering. These are laid on in a semi-random pattern, based on how the sizes fit together. This is the most common for square cut stone.
- Patterned square cut arrangement. This uses square cut stone, but in a set pattern similar to how manufactured patio pavers are laid.
- Natural edge flagstone. This uses flagstone in the random, natural shapes stone comes out of the quarry with. Flagstone can be fit together with its natural edges, for larger joints and a natural look, or cut to fit for tighter joints. The tighter the joints are, the more cutting it requires, and the more it will cost. Natural edge flagstone is the most popular choice.
Color: Breaks down as follows
- Red. This is locally produced stone. You’ve most likely seen lots of it everywhere. It’s the cheapest stone available because it’s local. It’s also hard stone, and not subject to flaking and wear like some other stone is.
- Buff. Buff stone is tan, and comes in several varieties, by production location. Colorado buff is produced locally, and is a darker gray-tan. Other varieties available at local material yards include Arizona buff, which is bright and almost yellow, and New Mexico buff, which is more brown. Buff stone is very popular, many people find it more attractive than the commonly available flagstone, and it sets your home apart from the rest. However, it is more expensive due to its rarity in our area. It also tends to have issues with layers of the stone flaking up over time. Sealing it is important to prevent that.
- Gray. Many gray stones are available. They’re a little bit more expensive and harder to find, but are an extremely attractive option. Some varieties include flat gray slate and sandstones, and the glittery quartzite.
Call and arrange a time for us to come out for an estimate, and we can discuss the design options you want. I also measure out the area for the veneer, and take note of site conditions (such as areas that need special reinforcement), so I can crunch the numbers and send you a quote.