henry&hymas consulting engineers provide cost effective building investigations and remedial engineering solutions for asset, strata and building managers.  

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Remedial & Strata Reporting

Our investigation and reports will identify issues, rectification priorities and remedial works. We can also be engaged for coordination and supervision of project work.

henry&hymas provide comprehensive site investigations and building defect reports identifying structural issues, rectification priorities and remedial works. We can also be engaged for coordination and supervision of project work.

Our remedial engineering team are highly qualified, experienced and provide superb service. We also provide a detailed scope, specifications and costing for defect rectification works.

Structural and remedial engineering

With over 30 years of structural and remedial engineering experience we are superbly qualified to conduct building condition assessments, defect audits and provide preliminary and comprehensive reports for owners Corporations, property and asset managers.

The implications of defects can be devastating to owners so it’s incumbent on managers to use highly skilled and experienced consultants. We have carried out literally thousands of inspections and reported on almost every conceivable building defect.

Structural diagnostics & building audits

Building structures age, foundations settle and walls move. Building facades deteriorate and connections decay and corrode. Windows leak, render cracks, brick ties corrode. Buildings can become dangerous and need to be audited periodically to identify risks to the community, other structure and assets.

Henry and Hyams are on-call for the largest facility managers in the world and hundreds of strata and property managers to respond to urgent issues with buildings and structures. We have identified critical ‘code red’ issues on number of occasion requiring immediate works to eliminate immediate threats.


henry&hymas carry out dilapidation reports for builders, local government and infrastructure projects. Construction creates vibration and the associated works can impact the structure and integrity of surrounding structures. A thorough photographic record of the buildings, homes, infrastructure, facilities is essential to protect asset owners and managers.

Concrete Spalling (concrete cancer) caused by Magnesite

Concrete spalling is caused when steel reinforcement in concrete begins to rust. When steel rusts it expands causing concrete cracking and flaking. Voids are create allowing water ingress compromising the concrete strength.

Many properties constructed in the 1980s used magnesite topping as an insulation layer over concrete slab.  It was later realised magnesite could leach chloride ion into concrete slabs and if subjected to moisture causing steel reinforcement to rust leading to concrete spalling (concrete cancer).

During removal of floor covering, extensive concrete spalling to concrete slabs has been discovered.  Henry & Hymas Remedial Engineers are  engaged by the strata and property manager to investigate the cause of the concrete spalling & provide suitable recommendations on rectification and technical supervision during the repair.

Conventional treatment normally involves scabbling & removing the concrete cover up to 30-40mm to the entire floor slab to remove the contaminated concrete.  Henry & Hymas Remedial Engineers may also recommended a cost effective non-destructive approach which was to poultice the entire concrete slab by using Westox Cocooning in order to extract excessive chloride from the contaminated concrete.  During the investigations detailed reports for insurance purpose can be prepared to assist with claims.

Waterproofing and Flashing Repairs – case study
Whilst waterproofing membranes are commonly used to prevent water ingress through a structure, flashing and capping is typically used at wall and roof intersections to seal and protect structural joints from water penetration.   Joints formed from intersections of walls or roof mounted structures are often one of the most vulnerable areas and are extremely susceptible to water leaks.

The property inspected was an industrial complex comprised of two levels. Ground level is primarily office complexes whilst Level 1 is mostly warehouses with an external suspended carpark area. The carpark area has been utilized in the past as a storage area with containers and forklift operations directly loading this slab.  Henry & Hymas Remedial Engineers were engaged to audit the premises and provide a structural engineering assessment and recommendations for the various defective areas.

Defective areas included a planter box leaking along a horizontal joint above one of the office units within the carpark.  Staining to the wall was noted due to the leaking of the garden bed. Additionally, fine hair line cracks were noted (0.2mm-0.3mm in width) in various areas, which have been caused due to shrinkage of the concrete. The waterproofing membrane in the planter box failed, allowing water to seep out through the construction joint.

Henry & Hymas Remedial Engineers project management services including preparation of a cost effective scope of works, and tender documents, contract administration and remedial buildering management.  The project was completed in an efficient manner due to the outstanding collaboration between all parties involved.

Structural Audits and Renovations – case study
Henry and Hymas Remedial engineers were contacted by the tenant of a five storey brick building with load bearing brick internal walls to assess the possibility of removing structural walls for a new kitchen and open floor plan layout.  The tenant wished to remove two walls spanning across the centre of the unit as well as creating a new doorway within a third wall. Our engineers assessed the loading induced onto the walls as well as the bracing effects these walls provided the building and accurately determined the beams required to replace the walls.

In order of ensure the walls were removed without effecting the units over or the buildings overall structural integrity, Henry and Hymas engineers provided detailed design sketches and reports. Our sketches and reports detailed all propping sizes and layouts required during demolition works as well as all fixings details required upon installation of new beams. We also detailed a demolition and construction sequence which contractors easily followed during works to ensure no incidence to adjacent units occurred during works.

The walls were successfully removed without causing any incidents to the surrounding apartment or compromising the buildings overall structural integrity. We successfully ensured works were coordinate smoothly and safely between all tenants, strata managers and contractors.

Building Façade Repair – case study
The  property in Auburn was built approximately 15 years ago.  It has a brick façade with exposed concrete slab edges on each floor.  The brick façade has multiple cracks together with loose render along slab edge due to poor workmanship and brick growth. The original render to the slab edge is bonded to the adjoining brick façade, thus causing the render to fall off which creating major safety issues throughout the complex. Henry & Hymas Remedial Engineers assessed the condition and developed  a feasible solution for to repair the building façade. A photo during the repair is shown below.  Henry & Hymas Remedial Engineers prepared the Scope of Works, tender documents and project managed the entire contract.

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