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Repointing Process

 

Existing mortar is removed from the bed joints using a twin bladed wall chaser with vacuum attachment.  The vacuum removes around 95% of the dust and debris from the mortar raking process, ensuring that the working area remains as clear as possible and does not pose an inhalation hazard to the public or co workers.

The width between the blades is adjusted to the width of the existing bed joint in order to ensure complete mortar removal.  The depth of the cut is adjustable although 20mm is the industry standard.

 

 
 
Once the bed joints have been removed the perpendicular joints (perps) are taken out using one of two machines we have available.  If the existing mortar is soft (which is usually the case) a mortar router is used, again in conjunction with a vacuum attachment.  This tool is also fully adjustable and can be used to remove both bed joints and perps on projects where the use of diamond cutting blades is restricted.

On occasions when the existing mortar is harder, we use an angle grinder with diamond blades. 

 
 
 

 

Once the mortar raking process is complete, the brickwork is power washer to remove all debris and fungi that have accumulated on the face of the bricks throughout the years. .  In most cases this restores the brick face to the condition in which they were first laid.

 

 
 
 
 
 
 
 

 

Finally the preparation process is complete and the failed mortar can be replaced with a well graded and durable mortar.  The perps are the first joints to be replaced, using a hawk and trowel in order to achieve any finish or style that is required.    A wide range of trowel widths are available to ensure that mortar can be pressure pointed directly to the back of the joint leaving no air pockets and allowing complete adhesion the brick.

 

 
 
 

 

 
 
Once an area has been fully perped, the bed joints are added.  These are pressure pointed directly off the hawk right to the back of the joint.  The consistency of the mortar used for the perps and the mortar used for the bed joints differs immensely.  The mortar used for the bed joints is a lot drier in order to save the face of the brick from any staining.  

 

 
 
 
 
 
 
 
 
 
 
 
 
Once the mortar reaches a temporary set, the joints are brushed to remove any surplus mortar and the repointing process is complete.

 

 

 

FocalPoint strongly recommend the use of a masonry water sealer to protect new and existing brickwork and pointing from the damaging effects of penetrating rain.  We use a high quality water sealer which seals the capillaries of the bricks to prevent water absorption but does not block the pores of the brickwork allowing the natural dispersion of water and salts, usually referred to as breathing.  New pointing must be allowed to fully dry out before this process commences and a settling period of at least two weeks is recommended.   We apply the sealer using a hand spray which ensures all areas are fully saturated and even the inaccessible areas, such as behind down pipes, are treated.  As a note of caution, be careful when choosing a water sealing product.  Many act as a complete barrier on the surface of the brick work, in these instances any moisture held within the brickwork ends up being draw out to the inside of the building, leading to damp problems.  FocalPoint can advise on which water sealers are appropriate for each individual need. 

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