Installing Stone Veneer Over Painted Concrete Block

Tap the stone panels to the wall with a rubber mallet.

Installing stone veneer over painted concrete block.

Wipe the back of the panels with a wet cloth. At the least you will need to apply a wet scratch coat to the brick before you install the veneer. Call an rcp block brick near you for available products and tips. Natural stone veneer over painted cinder block natural stone does not require mesh to adhere to another surface unlike the manufactured variety.

Start installing the stone veneer at the wall corner. It is recommended to install all corner pieces first before installing the field. If you re using the mortar to hold on stone veneer the mortar should be scraped onto the back of the stone and then pressed into the scratch coat. Now the wall is ready for a layer of mortar that will adhere to the scratch coat.

If your asking about cultured stone or some other lick and stick product then it is similar to stucco and you would probably be best to start with wire mesh and scratch coat that and then apply the stone. It requires a sound footing and a somewhat bondable surface as well as fasteners such as galvanized hot dip l shaped wall ties to bond the stone to the concrete. Applying stone vaneer to painted concrete block a stone veneer would be full depth 3 5 inches which would not require any change to the block. A scratch coat is a rough coat of mortar that provides a firm porous surface for the veneer to stick to.

If your substrate is cmu or concrete then you can sandblast it remove the residue and install stone veneer with a polymer modified mortar or thinset. The mortar that squishes out over the stone will then form the mortar joint between that stone and the next stone. Use a pre blended polymer fortified type s mortar and water known as svm stone veneer mortar. Mix according to manufacturer s directions.

Slide inch thick wood shims under the veneer panels to hold them even with the level chalk line. At best you install a firm layer of cement board over the brick then install the veneer on the cement board. Cover the lath with a scratch coat of mortar to. Spread inch of mortar onto the back of the stone veneer panel and press it to the wall.