Stack stone, also known as ledgestone or veneer stone, is a beautiful way to enhance walls, fireplaces, or exterior facades. However, creating a clean and seamless inside corner can be challenging due to the irregular shapes and varying thickness of the stones. Here’s how to properly finish an inside corner with stack stone for a professional look.
1. Plan Your Layout Before Installation
Before installing, dry-fit the stones to see how they align in the corner. Stack stone pieces come in different shapes and sizes, so mixing and matching pieces ahead of time will help create a natural and seamless transition. If the stone manufacturer provides pre-made corner pieces, use them for the best fit. Otherwise, you’ll need to cut and stagger the pieces manually.
2. Use the Overlapping Method for a Natural Look
The best way to create a seamless inside corner is by using an overlapping or alternating pattern:
- On one wall, extend a full stone piece past the corner.
- On the adjacent wall, cut a stone so it fits neatly against the extended piece.
- Continue alternating layers, overlapping the stones to mimic a natural stacked look.
This method prevents visible straight-cut seams that could disrupt the flow of the stone.
3. Cutting the Stone for a Tight Fit
If you need to cut stones for the corner, use a wet saw with a diamond blade for precise cuts and minimal chipping. A grinder with a masonry blade can also work for smaller adjustments. When cutting, make sure the edges align tightly to avoid visible gaps. If your stack stone has a rough or chiseled texture, slightly round or texture the cut edge with a hammer or chisel to blend it naturally.
4. Apply Adhesive or Mortar Correctly
Use a high-quality thin-set mortar or stone veneer adhesive to secure the stones. Apply mortar evenly on the back of each piece and press it firmly into place. For inside corners, it’s crucial to ensure a strong bond, so apply extra mortar to the edges that meet in the corner. If necessary, use shims or temporary spacers to keep the stones aligned while the mortar sets.
5. Fill Gaps and Blend the Finish
Once all stones are set, check for any small gaps in the corner. Use matching mortar or grout to fill in gaps where needed. If your stack stone is dry-stacked (without visible mortar joints), make sure the edges fit tightly together. Lightly brush or blend any excess mortar to maintain a natural look.
By following these steps, you’ll achieve a seamless and professional-looking inside corner with stack stone. The key is proper planning, precise cuts, and a staggered installation to maintain a natural, flowing appearance.
