FAQs

At BUSS we know that there are common questions that need addressing and often require urgent attention.

See below for FAQ’s regarding:

  • All
  • Concrete Repairs
  • Facade Remediation
  • Joint Sealing
  • Waterproofing

Concrete cancer occurs when the inner reinforcing steel begins to rust and corrode. The rusting steel expands, forcing the surrounding concrete to be displaced and weaken. As the steel pushes away from the concrete, the exposure to natural elements is increased and increases the rate of deterioration.

Concrete structures are continually exposed to natural and manmade elements which, over time cause the deterioration of a concrete structure. No matter the situation, BUSS can provide a solution to maintain and rehabilitate any structure and environment, based on the assets operational and budget requirements.

Cathodic protection describes a method which is used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. This involves a simple method of connecting the metal which is to be protected to a more easily corroded “sacrificial metal” to act as the anode.

Crack Sealing and Injection is the process of repairing concrete damage, by applying a sealant directly into the damaged, cracked concrete. Damaged concretes and cracks can vary in size, starting from small hairline cracks through to large scale structural repairs. Crack Sealing and Injection also includes repairing internal holes, spalls and cracks through to external damages where heavy traffic flow is expected. Once cracks are sealed, the now repaired crack will be two to three times stronger than the original concrete, which ensures a long lasting and durable crack repair solution.

Core Drillings are necessary to route cables, conduit pipes, and wires through structures for renovations, demolition or in new build constructions. The typical core drilling applications include walls, ceilings, roofs, bridges, tunnels, and even road surfaces. Core drillings are also used to test core samples of concrete and asphalt.

All buildings undergo damage due to the effects of time, weathering, aggressive environmental conditions and pollution. Facade remediation is the term used to restore assets to their original condition. Modern techniques allow almost any building component such as masonry, steel or concrete to be remediated instead of replaced resulting in consistency of appearance to the aesthetic of the structure.
Facade refurbishments require professionalism and detail in the execution of the works. Further, the works need to be undertaken safely and with minimal disruption to the facility users.

Cracks frequently occur in masonry structures when there is differential settlement of the structure resulting in concentrated forces at a given location. Masonry may crack as a result of movement in foundation soils, cyclical wet and dry, hot and cold environmental conditions or a number of other causes. The result is that the bricks and/or mortar in this location fails resulting in an unsightly and structurally unsound crack.

Crack stitching and repair provides a permanent solution for masonry repairs and cracked wall reinforcement.  The crack is repaired and stabilized using the installation of stainless-steel bars into the fabric of the building in this location. The existing mortar is removed and the high tensile strength structural stainless steel is then embedded and fixed into position using a high strength grout. The new structural steel then spans across cracks in walls to reconnect and strengthen masonry

Lintels are metal, concrete or wood beams that span an opening such as doors or walkways. Lintels are designed to distribute the vertical load from above to either side of the opening and down into the structure and foundations. Lintels frequently present with surface cracks indicating the lintel is being overstressed and/or degrading. Frequently the cause is steel corrosion, water ingress or increased structural load.

Damage to the lintel may lead to collapse and damage the adjacent members such as frames, surrounds (window, door or masonry).  Buss undertake lintel repair and treatment under the advice and direction of our in-house structural engineer and all works are executed safely.

Render is designed to envelop structures in a protective coating and it is the primary defence against the elements. When placed correctly even the best render will need repairs and remediation in order to perform well and remain aesthetically pleasing.

If neglected, serious flaws can develop quickly. Damage such as cracking, drummy, the delaminating or bulging render is evidence or poorly installed or damaged render. Drummy render will sound hollow when tapped and is evidence that the render no longer adheres to the substrate. If the render does not adhere to the substrate then it is a possibility that portions of render may fall off, thereby posing a risk to persons and property.

Cracking due to shrinkage can also develop where the original render mix was too strong. In some cases, missing lumps of render are also simply down to physical damage. Either way once damp becomes trapped behind the surface it can penetrate through solid walls, setting up the conditions for rampant timber decay within the building.

Heritage repairs involves building maintenance that does not involve the removal of, or damage to, the existing fabric of the building or the use of any new materials. All cleaning conducted must be low pressure, nonabrasive and non-chemical. An example of heritage repairs may include replacing missing or deteriorated material with like for like materials that do not involve the removal of, or damage to, the significant fabric of the building.

One of the causes of fretting bricks is due to salt contamination, sometimes water has a high salt content which attacks the brickwork, causing them to deteriorate overtime.  If the cement content in the mortar mix is low then the mortar starts to wear down over time and the bricks can become loose, causing a cascade of the surrounding bricks to also loosen and the integrity of the wall becomes an issue. If the wall has developed cracks then the cracks could be repaired by replacing the cracked bricks with new bricks or by stitching the wall in place.

Tuck-pointing is often interchangeable with re-pointing and is carried out when the existing mortar joints have deteriorated and started to collapse, causing holes in the brickwork which can lead to structural damage and cracking. A combination of extreme weather conditions, excess moisture and a weak mortar mix can cause masonry work and mortar to break down and fall out. It involves  using two contrasting colours of mortar in the mortar joints of brickwork, one colour matching the bricks themselves, to give an artificial impression that very fine joints have been made.

Caulking is the process undertaken to seal the joints / gaps / seams / piping / penetrations in structures necessary as part of the construction process. The installation of a flexible seal prevents the risk of any contaminants such as water, air, dust, insects, fire, oil or compounds damaging the joints integrity.

As part of the building regulations, it is necessary to comply with the Fire Safety requirements in accordance with Australian Standards. A critical part of this construction is to ensure that the sealing of electrical cabling and ducting, PVC pipes, steel and copper pipes, busbars as well as fibre optic are not a weak point in the fire prevention strategy of the facility. BUSS can supply fire collars and wraps which can be customized for specific requirements.

Silicone sealants form a tough, powerful, highly flexible joint using a single component silicone joint sealant for facade applications. Silicone sealants are designed to block and protect a surface from water and other weathering elements. Silicone is a gun applied, neutral sealant that is fast curing and forms a durable, weathertight seal. Construction Silicone remains permanently flexible even once it has fully dried or cured. This type of sealant can withstand very high temperatures, making it ideal for applications that suffer high heat exposure.

Silicone sealing is suitable for bathrooms windows, sealing lap joints in metal guttering, aluminium roofing, flashings and down pipes

The use of pre-cast concrete panels has increased in popularity over recent years. Well detailed and constructed joints are critical in ensuring that the structural integrity of the building is maintained and that it is weatherproof, compliant to fire resistance codes and has suitable acoustic performance.
Panel joint sealing is undertaken by sealing the joint type between the precast concrete cladding and the wall panels. The function of a joint between precast elements is to provide physical separation between the panels and, in conjunction with joint sealants, prevent the ingress of water and air into the building. Additionally, the joint creates a strong visual feature of architectural wall design.

In building construction, an expansion joint is a mid-structure separation of the various elements that combine to make the whole structure. Each element is separated by expansion joints in order to safely allow independent expansion and contraction of construction materials as well as absorbing any vibrations. Expansion joints can be found everywhere from households to buildings, bridges, roads and car parks.
With Perth’s extremely variable temperatures our buildings, roads and concrete slabs often expand and contract due to warming and cooling. Without the application of expansion joints these structures would inevitably crack under temperature stress.

Combiflex and Hypalon joints are a flexible membrane designed to span movement joints and structural cracks to seal the joint from invasive water or chemicals. Combiflex and Hypalon systems are used for construction joints, expansion joints and connection joints. Combiflex and Hypalon joints can be applied on damp substrates and the supporting epoxy adheres to concrete, iron and steel. Combiflex and Hypalon are comprised of flexible waterproofing tape of multiple widths combined with epoxy adhesives that can be used for multiple applications.

Remedial water proofing describes the application of waterproof membranes on new and existing buildings. Waterproof membrane types range from multilayer bitumen torch on systems, to liquid systems applied with a roller or sprayed systems that can be touch dry in less than 30 seconds and can be applied at a daily productivity of 1000m2.

Waterproofing is a fundamental but often overlooked aspect in new build construction. Waterproofing processes includes roof covering materials, siding and must be at least water-resistant and often waterproof. Many types of waterproof membrane systems are available dependent on the specific requirements.

It is essential for swimming pools, both above and below ground, to have the correct combination of the right waterproofing materials and professional workmanship to ensure both the structural integrity of the asset but also achieving cost efficiency in maintaining a swimming pool.

Planter boxes whether they are separate and free standing or they are attached to a home or commercial building, waterproofing is essential in order to shield adjacent areas from excessive moisture. There are many options of waterproofing membranes that can be applied to waterproof planted boxes.

Internal Wet Areas are described as common household areas which are readily affected by water usages such as bathrooms, laundries and kitchens. Bathrooms by their very nature are affected by constant water exposure being consistently among the most common building defect reported by homeowner’s, therefore, making waterproofing essential.

External areas such as balconies often suffer from water damage and related problems in industrial, commercial and residential buildings due to their constant exposure to the environment.  Although outdoor waterproofing solutions are dependent on the individual and specific requirements it is common for external areas to undergo liquid membrane coatings which is accustomed to Australian climate conditions.

Liquid applied membranes have been specialized in waterproofing to allow waterproofing to become more efficient and convenient.

Torch-on membranes are used as a continuous waterproofing method for foundations, basements, tunnels and concrete roofs. They are applied by flame bonding, allowing application to have a uniform thickness, stability at extreme temperatures, a high impact resistance, and high elasticity which can be later painted over to be maintaining colour consistency.

Due to the underground nature of the basement without the correct waterproofing applications, they would be damp, wet and unusable. Waterproofing membranes act as a failsafe barrier so that basements remain dry and practical.