Masonry Repointing Quiz

What is the purpose of repointing in masonry?

• To enhance the color of the bricks

• To replace the mortar and slow wall deterioration

• To increase the height of the wall

• To add decorative elements to the wall

Why should cement-based mortar not be used on historic walls?

• It is too flexible and permeable

• It is too strong, inflexible, and impermeable

• It is too weak and crumbles easily

• It is too expensive

When is repointing generally advisable?

• When the mortar joint is firm and intact

• When the mortar joint is soft and crumbling

• When the wall is newly constructed

• When the wall is painted

What is the recommended depth for raking out joints in brickwork?

• 10mm

• 20mm

• 30mm

• 40mm

What tool is recommended for cutting out damaged bricks?

• Plugging chisel and a 2½lb club hammer

• Mechanical disc cutter

• Electric saw

• Jackhammer

Why should mechanical cutting with discs be avoided?

• It is too expensive

• It can damage the edges of stones and bricks

• It is too slow

• It requires special training

What should be used to thoroughly wet the cleaned joints and face areas?

• A hose

• A brush or spray

• A sponge

• A cloth

What is the recommended mix for mortar in old buildings?

• Cement/sand mix

• Lime-based mix

• Pure cement

• Pure sand

What type of sand is not appropriate for lime mortar?

• Fine-grained sand

• Coarse sand

• Washed sand

• Sharp sand

What should be avoided when pointing bricks?

• Working in dry conditions

• Pointing in frost

• Using a stiff brush

• Using lime mortar