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How to Grout Interior Brick Veneer

Follow these steps to complete the installation of interior brick veneer by applying mortar to the brick joints.

More in Windows Walls and Doors

create a smooth line on finished grout

Step 1: Put Down Plastic Sheeting

Once you have finished laying your brick, remove the drop cloth and clean up your working area. Tape a plastic drop cloth to the floor -- grouting can be a very messy process.

Step 2: Mix the Grout

Prepare a premix bag of mortar according to the manufacturer’s instructions. Use a trowel to stir water into the mix until the consistency is close to that of peanut butter. Mortar can be harsh on your hands, so it's a good idea to wear gloves.

mix mortar until the consistency of peanut butter

Step 3: Set Mortar Into the Windowsills

If you have chosen to set your sills with stone veneer, they can be set with the mortar mix. Set the mortar in the sill with the trowel, keeping it away from the brick and wood -- mortar is difficult to clean up so it pays to be careful. Set the sills and check them for level, side-to-side and front-to-back.

Set the sills and check them for level

Step 4: Apply Mortar With a Baker's Bag

Fold over the end of the baker's bag to prevent it from leaking with you fill it, and then use a trowel to fill the bag with mortar (Image 1). Test the flow of the material before you start to make sure it will come out at a controllable consistency.Begin grouting by running the baker’s bag along the joints and slowly squeezing the mortar into the gaps (Image 2). Work slowly and carefully to prevent mortar from getting on the brick face, as it's difficult to clean.

Step 5: Recess the Joints

Allow the grout to set before using a half-inch jointer to recess the joints. When jointing the corners, start at the corner to keep the grout in place and create a smooth line.

use a jointer to recess the joints

Step 6: Brush off the Excess

Once you have grouted and jointed the entire wall, brush off excess mortar with a cheap paintbrush. Allow the grout to dry for about 24 hours.

use a paintbrush to brush off excess mortar

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