When bricks become badly damaged they need to be replaced in order to preserve the integrity of the structure. This technique for repairing brick siding should only be used for replacing a single brick. If multiple bricks are damaged and in need of replacement it will be necessary to contact a professional mason.
With a pair of safety goggles on, use a regular hammer and chisel to remove any mortar around the damaged brick. Work slowly and be very careful not to damage any of the other bricks. Completely remove the old brick and any mortar in the hole - ensuring that it is free from debris and dirt on every side.
The most difficult aspect of this procedure is finding a matching replacement brick. If the old brick siding is weather-beaten, bring it to the store to compare it against brand new bricks to get the best match.
Use a small trowel to apply water resistant mortar to the sides and bottom of the vacant hole. The mortar should be spread to a 1 inch thickness that leaves the top side of the hole clean. Dampen the replacement brick with water which will help it to absorb the mortar. Spread 1 inch of water resistant mortar on the top of the brick and gently slide it into the hole.
When the new brick is placed into the wall mortal will ooze out and should be removed by sliding the trowel against wall. When the new brick is flush and all excess mortar has been removed from the brick siding, allow 48 to 72 hours for the mortar to completely cure.
Mortar Cracks
Over time mortar will degrade and eventually cracks will develop that allows water to migrate in. Brick siding will erode quickly if water is allowed to seep in as it expands and contracts according to the temperature.
While wearing safety goggles remove any damaged mortar with a hammer and chisel. All loose mortar and debris must be removed to provide a secure surface for the new mortar. Use a wire brush inside the crack to ensure the surface is properly cleaned.
Moisten the area inside the crack with water from a spray bottle. Load a small trowel with water resistant mortar and press it firmly into the crack. Continue packing mortar into the crack until it is completely full and remove any excess mortar by sliding the trowel across the brick siding. Allow 48 to 72 hours for the mortar to completely set.
John Beres - John has been a technical writer for over 9 years. Although the majority of his work is considered proprietary information, he has twice ...
