Before applying, lay out a small area of stone in front of your project area to give you an idea of the laying pattern on your wall.
Arrange the pieces so that they fit complimentary next to one another. It is useful to take photographs at this stage to refer back to and use a numbered sequence left to right.
Try to avoid fitting similar size pieces together in the one area.
First, coat the wall with LBS adhesive using a notched trowel but only apply enough adhesive that can be covered within 30 minutes.
Note: Stone Veneer must not be fitted externally when temperatures are forecast to be 5°c or less or more than 35°c degrees for the next 48 hours.
Step 2 - Installation
Start at the corners and work towards the centre of the wall.
Be sure to alternate long and short returns on corner pieces.
Take a clean stone and slightly dampen the back, this will remove any dirt and will prevent moisture loss from adhesive.
Apply a coat of adhesive approx. 10mm to the entire back of the flats and corners.
Press the stone onto the wall rotating slightly to force some of the adhesive to squeeze out.
Any adhesive forced out should be removed before the adhesive is allowed to set. Adhesive joints are better off narrow but should be consistent.
Fill any gaps with small stones and use spacers where necessary to maintain the joint. Evaluate your work as you go along.
Cut and trim the stones if you need particular size to fill the gaps.
Step 3 - Fitting Stones & Grouting Joints
Fill all the gaps between the stones with Gun Pointing Mortar (GPM) or alternatively grout with a sand cement/lime (check suitability) to slightly above the desired finish depth. The grout will tighten and seal up the area around the stone.
Let the GPM/grout dry until it is firm but not solid. You want to be able to push on it without leaving fingerprints, but don’t let the GPM/grout dry too much or it will be very difficult to strike.
Strike the GPM/grout to achieve the desired finish look.
Use your striking stick to scrape along the joints until the GPM/grout has a clean and even look.
Step 4 - Sweeping the Stone
Finally, use your medium bristled brush to sweep the dust off the stone.
Stone Veneer is light and easy to install and offers a significant cost saving on labour and material compared with traditional masonry.