Home Renovations Vermont – Repointing Brickwork

Holiday Home Renovations Vermont – Repointing Brickwork

Repointing is the process of replacing mortar that is showing signs of age and wear in the joints of a masonry wall with new mortar. Any signs of deterioration signal the need for re- pointing. These can include mortar that has gradually recessed, cracks in mortar joints, loose bricks, damp walls or damaged internal plasterwork.

Mortar is softer and more porous than bricks and therefore takes the brunt of the weathering process. Cracked and broken mortar can result in damp inside the house so it is best to deal with repointing as soon as possible before the problem escalates.

Preparation involves raking out the joints out to a minimum depth of approximately 10-20mm depending on the type of brick by using an angle grinder or a plugging chisel. All dust and debris must be removed from the joints before beginning the repointing and the brickwork must be kept slightly damp to prevent the new mortar drying out too quickly. When undertaking any repointing it is important to begin work at the top and gradually work down the wall in order to ensure that all the dust and damping down is below any completed work.

The correct mortar mix is essential to ensure that the mortar is not stronger than the brick or the brick will crack and the mortar will fall out due to lack of flexibility.

Repointing is a time-consuming job and a square metre patch of brickwork could take up to 4 hours to rake out and repoint properly. Unless the area affected is relatively small it would be advisable to get help from a professional.

Give Donnelly Home Maintenance in Hermanus a ring for a free and friendly quotation.