Plesons Brick and Stoneworks Signature Tuckpointing Procedure
Step 1-Evaluate the mortar old mortar removal process
Old mortar removal is accomplished by either grinding, chiseling or hand raking the deteriorated mortar from the joints to a minimum depth of 5/8”. Then the joints are either hand brushed or blown out to remove dust and debris to insure a strong bond with new mortar.
Step 2-Repointing procedure
Once the joints are cut out and properly cleaned, new mortar can be applied to the joint with a jointer. There are many different joint styles available. Concave, flat, weathered, raked and grapevine just to name a few are often used. Mortar type is also a big factor in Tuckpointing. Historic homes often used softer brick than the units available today. These soft brick cannot tolerate the high compression strength of Portland rich mortars used in present masonry construction. This hard mortar commonly causes the soft brick to give way when settling, expansion and contraction, and other movements occur which result in spawled or sheared brick faces, severe cracking, and chipped brick edges. To avoid these problems a lower compression strength lime mortar must be used. Color match Tuckpointing is an art that is accomplished by highly experienced masons who can break down the mortar to find out what was originally used. Type of sand and tooling techniques play a dominant role in proper matching of mortar. This process can be a time consuming but rewarding task when the project is completed. Once the joints have been pointed and properly brushed the curing process begins,
Step 3-Cleaning process
Once the joints have cured it is time to determine if a cleaning procedure should be performed. There are endless masonry cleaning products and procedures, we use the prosoco brand. Prosoco carries a wide variety of masonry detergents, acids, restoration cleaners, mold killer, efflorescence removers and white scum removers to bring grungy looking building or homes back to their original beauty.
Step 4- Waterproofing
To get the best performance it is always recommended that a sealer is applied after tuck pointing, replacing brick, replacing stone, new brick, new stone on parapet walls, chimneys, or any other masonry unit that is exposed to the elements. Not all sealers are created equal! Please do not be fooled into a low quality sealer sold at the home improvement stores, they simply do not last. If a contractor tries to apply something of this nature to your building, simply refuse these products.
A breathable, silicon based sealer such as prosoco Siloxane PD is a high quality product that goes on clear so there are no shiny, discolored, or patchy looking areas after application. This product has been tested to last for up to 10 yrs. In even the harshest environments. This is a breathable sealer which means if water were to enter the wall through a hole or crack it can still escape. Please do not be fooled into a waterproofing