There are several reasons why the mortar or cement might be falling from your walls here in WA. Firstly, if your home was constructed between 1980 and 1995, there is a strong chance that the cement was defective or that the bricklayer added detergent to the mix.

Rising damp is another reason for deteriorating mortar. This occurs when moisture from the ground is slowly absorbed and drawn upwards through the lower six or seven courses of bricks. Over time, this constant dampness can lead to the mortar crumbling and falling out, a condition commonly known as fretting mortar.

Several factors can contribute to excessive water near your walls, exacerbating the problem. Poorly designed or maintained drainage systems are a common offender, allowing water to pool near foundations. Similarly, ineffective reticulation systems can saturate the earth adjacent to the house, providing a continuous source of moisture for rising damp.

Beyond drainage issues, other environmental and material factors can play a significant role. Proximity to the sea, for instance, exposes buildings to higher levels of airborne salt and moisture, which can accelerate the breakdown of mortar.

Furthermore, the incorrect use of different types of cement during construction can compromise the mortar's integrity. Using materials like coastal cement, brickies' lime, or natural hydrated lime inappropriately, or in the wrong proportions, can lead to a weaker, more permeable mortar that is highly susceptible to fretting when exposed to moisture.

In a word, yes! The mortar can be replaced. This involves removing any loose debris and then cleaning the area with water. The mortar is mixed at a ratio of 3 parts sand to 1 part cement. The tricky part is matching the mortar pointing as closely as possible, using various methods. These include blending cement and using oxides. The mortar is then inserted into the joint and troweled off. A joint to match the original is then used. Finally, the area is brushed and cleaned.

Yes, it indicates an underlying problem, such as water damage or poor construction. It is important to address this issue to prevent further damage, such as brick dislodgement.

This is a problem known as fretting or fretting bricks. Water, which has salt dissolved in it, passes through the brickwork to its surface, blowing the front (face) off the brick.

Small cracks are normal with settlement. Movement in the footings are the main causes of cracks in brick walls.

Yes, a crack can be stitched with the use of Helifix bars. The mortar is cut out from the joint to a depth of 30mm, then washed. Manufactured grout is then installed. A stainless steel bar is inserted into the grout and then repointed with a cement or lime mix to match the original.

These are bricks that have become crumbly, soft and powdery, typically due to moisture and salt attack. This occurs when water enters the bricks or mortar, and as it evaporates, it leaves behind salt crystals that break down the material from within. Read more about fretting bricks.

Yes, they can.

Lime mortar is a traditional type of mortar made from lime (calcium hydroxide), sand, and water. It is known for its breathability, flexibility, and self-healing properties, allowing walls to manage moisture effectively and accommodate slight structural movements. This makes it a popular choice for historic buildings and conservation projects. Read more about lime mortar.

Over time, steel lintels above your windows (if not treated) will corrode, expand and lift the brickwork above them. At this point, those lintels need to be replaced.