March 27

What Remdial Building Services offer | What we Do | Remedial Building Services

If you want to know why you need more than a handy [...]


We are always open and transparent with all our clients about each element of the work we undertake on their building. To help you understand some of the commonly used terms in building rectification works, we have compiled this glossary.

Brick TiesBrick ties are galvanised strips of metal which are placed between bricks and connected to the frame of the building to reinforce the structure and prevent distortion of the walls.
Carbon Fibre StrippingCarbon Fibre Stripping is the technique of applying carbon fibre strips to concrete slabs in order to increase structural strength. This allows the slab to bear more weight and in some situations can also be used as an alternative to replacing the slab.
CladdingA form of building material affixed to the facade of a building usually for architectural purposes. Non-compliant flammable cladding has been responsible for numerous building fires and deaths across the world.
Concrete CancerConcrete Cancer is one of the most prevalent structural issues, which occurs when the steel reinforcement inside a concrete slab is exposed to water and begins to rust. As the steel rusts, it begins to expand, causing cracks and breakages in the concrete. These cracks let in even more water, causing the problem to worsen and spread.
DynaboltsDynabolts are used to anchor concrete, masonry, brick and natural stone. As the bolt is screwed into the wall, it pushes an encasing sleeve outwards creating a triangular effect. This allows it to ‘grab’ better and provide stronger anchorage.
Latent DefectLatent defects are those which are not observable on the façade of the structure and can only be discovered by deeper investigation. A common example of a latent defect is rusted steel reinforcements which have not yet begun to affect the exterior of the building.
LintelsLintels are horizontal beams used above a window or door to support the weight of a wall.
PondingPonding is an unofficial but commonly used term which describes the collection of water in areas other than dedicated water outlets, resulting in unwanted puddles. These puddles become problematic as they can cause flooding, leaking or water ingress.
Roll-on MembraneRoll-on membranes are a class of surface coating used exclusively on flat surfaces. Roll-on membranes are used primarilyfor waterproofing, but specialised products also provide chemical and non-slipresistance.
SpallingSpalling is the observable defect caused by concrete cancer (see definition above). Spalling occurs when the expansion of reinforcing steel within the structure causes large chunks or flakes of building material to come away.
Structural Repair

Structural repair is the general term used to describe work that seeks to repair the structure of a building. It involves correcting structural issues to bring the building into compliance with the relevant requirements.

Torch-on MembraneTorch-on membranes are a form of bitumen-based waterproof coating used on flat roofing structures. Intense heat is applied to the membranes, causing the bitumen to melt and adhere tightly to the surface, which creates a waterproof seal.
WaterproofingWaterproofing is a general term used to describe the protection of a structure’s flat surfaces to prevent water ingress. The two types of waterproofing are: liquid or roll-on membranes and torch-on membranes.
Water IngressWater ingress is the term used to describe the permeation of water into the structure of a building. Water ingress can range in severity from a small leak to a wide scale permeation which causes significant damage to the building’s structure or to internal elements. It can cause both aesthetic, immediately observable defects such as water stains as well as serious latent defects such a concrete cancer.
Water ingress is often more severe in coastal areas where rain and high wind combine to allow water to reach cavities it may otherwise not have reached.
September 04

Glossary Of Fire Rating Terms | Nullifire | Permax

Our glossary of fire rating terms will help you un [...]


The field of Fire rating can be a complex one. There are the requirements of the NCC and the interpretation of what it means, there is the terminology for each technology type and there are abreviations and other confusing terms. To help you understand some of the commonly used terms in fire protection, we have compiled this glossary.


Active Fire Rating

Refers to suppression systems which are designed to restrict the flow of fire and smoke around the building. By default this includes fire doors, sprinkler systems, suppresion systems etc.

Building Code of Australia

According to the HIA:
The National Construction Code (NCC) provides the minimum necessary requirements for safety, health, amenity and sustainability in the design and construction of new buildings (and new building work in existing buildings) throughout Australia.

The Housing Industry Association reproduces the Building Code of Australia (Volumes 1 and 2 of the NCC) under licence from the Australian Building Codes Board.

Volume 1 pertains to Commercial Buildings (Class 2-9 Buildings) and Volume 2 pertains to Residential Buildings (Class 1 & 10 Buildings).

Carbon Fibre Stripping

Carbon Fibre Stripping is the technique of applying carbon fibre strips to concrete slabs in order to increase structural strength. This allows the slab to bear more weight and in some situations can also be used as an alternative to replacing the slab.

Core Filling

Tests have shown that structural steel with hollow sections produce has poor performance when subjected to heat or fire.  Because of this, these sections are often core filled with concrete to achieve the required fire protection ratings.

DFT - Dry Film Thickness

This is a measurement of the thickness of an applied paint (in this instance an intumescent) above the substrate as measured when the paint is dry. 

Fire Board

Composite cement filled plasterboard which is often used to shield structural steel from sight and from flame.


Otherwise known as Fire Resistancee Level is the grading period measured in minutes for three key criteria: structural adequacy, integrity and insulation.


Integrity refers to the ability of a structure to resist the passage of flames and hot gas


The ability of a structural steel member to maintain a temperature below the threshold on the side NOT exposed to the fire. Ie how well can it insulate and keep the temperature down?



The NCC - released by the Australian Building Codes Board - stands for the National Construction Code. It sets out the minimum requirements for safety, health, amenity and sustainability in construction


Nullifire is a global leader in the development and manufacture of passive fire protection products inclusive of the market leading SC902 Hybrid intumescent.

Passive Fire Rating

Unlike Active Fire Rating, Passive fire rating refers to systems which seek to preserve the structural integrity of the building. These measures include Fire rated paints such as intumescents. 

Structural Adequacy

Defined as the ability of a specific structure (in this case structural steel) to maintain its stability and load-bearing capacity.


Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion when heated. It is a highly absorbant materials which was popular during the 1980s and 90s as one of the first products used to protect steel from the effects of fire.
Vermiculite is still used today although it has been replaced by newer technologies such as Nullifire.