A foundation with large exposed areas can be unsightly. Fortunately, the concrete cinder block typically used in home foundations makes an ideal substrate for an applied rock fascia. Using creek rock fascia stones, you can make it look like your home is resting on a foundation of natural stone. The installation process is very similar to that of setting wall tile, except you have more freedom in how you arrange the fascia stones to get the look you want.
Things You'll Need
- Concrete masonry unit foundation
- Tape measure
- Creek rock fascia stones
- Creek rock corner stones
- Portland cement
- Masonry sand
- Polymer-modified thinset compound
- Large bucket or wheelbarrow
- Masonry trowel
- Grout bag
- Thin wire brush
Estimate the amount of fascia stone to be used. For each wall, measure the length and height of each exposed wall, and multiply the two figures to estimate the amount of square footage of facia stone to order. If the exposed wall is on a steep grade, take 1/2 the maximum height times the length.
Estimate the linear feet of corner stones needed by measuring the length of exposed corners. Since each linear foot of corner also covers about 3/4 foot of flat wall space, you'll need to take the total linear feet of corners, multiply it by 0.75 and subtract that amount from the flat wall space to get the actual amount of flat wall stones you need.
Mix the adhesive coat. Mix 2 parts Portland cement, 1 part thinset and 5 parts masonry sand in a large bucket or wheelbarrow. Add enough water so that the mixture is easy to work, but sticks to the trowel when it's set on edge.
Working in small areas, apply a thin coat of mortar to the foundation wall, starting from a lower corner. Apply only to an area small enough so that you can set fascia stones into it before it hardens.
Apply the fascia stones to the mortar. Because creek rock is irregularly shaped, you have a lot of latitude on how you set the stones up. However, to make the wall look authentic, you should try to arrange the stones so they are no more than 1/2 to 1 inch away from each other.
Allow the adhesive layer to set, usually 12 to 24 hours.
Mix the grout. Mix 2 parts Portland Cement to 7 parts masonry sand, with enough water so that it has about the same consistency as the adhesive coat.
Load some of the grout into the grout bag and twist the bag closed at the top.
Squeezing from the back of the bag, apply the grout to the spaces between the fascia stones.
Press the grout into the stone joints as it is beginning to set, using the back of the wire brush.
Wipe any chunks of grout off the surface of the stones with the wire brush. Do not allow the grout to set on the stones themselves.