Roof Inspection & Certification
It is required by law for a new roof structure to be inspected and certified by a qualified roof inspector. Without the A19 Completion Certificate you will not get your occupation certificate and could also suffer a backlash from your insures if any claims arise due to defects in the structure.
ECO Roofing uses an independent experienced roof inspector who follows the roof erection process from start to finish. Services offered by our independent roof inspector include:
- Supervision of newly erected timber structures
- Certification of new timber roof structures
- Roof structure evaluation assessments
Supervising the roof erection process
Building professionals are increasingly relying on effective project management based processes, by managing external professionals or specialized skills to ensure successful project deliverables. Recent case studies have proven the value of such overseeing activities, in eliminating many potential dangerous malpractices and abuse of structural elements on site.
This is also in line with the following: Construction Regulations No. 8.
The size and risk profile of this project necessitates the supervision of the erection phase of this roof structure and is also in line with the recommendations of the new “Construction Regulations” No. 8 nl. The appointment of a competent person by the Principal Contractor to oversee this section of the project.
It is furthermore strongly advised that a competent person in the industry be consulted to oversee the Roof installation process on a daily basis, to ensure that the correct Roof Erection Procedures are being followed and that bad practice and subsequent damage to the timber is avoided. This will also eliminate the possibility of missing any possible manufacturing errors, as the inspector will have the design & manufacturing documentation on site to compare the design requirements.
Why is roof structure evaluation assessments necessary?
Structure evaluation assessments are done to determine the structural integrity and serviceability of Roof Structures. Inspection Services include the following:
- Initial Structural assessment – Video recordings & photos.
- Re-design and analysis (if necessary) by professionals
- Written Roof Structure Evaluation Report with a repair summary.
- Bill of quantities.
- Supervision of the remedial work.
Why are roof structure inspections necessary?
It is a statutory requirement to comply with all the provisions of both the Building Standards Act Section 14(2A) and the National Building Regulations (Regulation A19) in order to obtain an Occupation Certificate from the Local Authority.
Through the proliferation of bad practices in the Roof Erecting Industry over many years, we have now witnessed an increase in this disturbing trend of Roof Structure failures.
Case studies, worldwide have confirmed that a lack of compliance with recommended installation procedures were the common cause of most of these failures and collapses.
We know that roof structures are made up of individual wood framing members that are connected with specially designed metal plates. These are amazingly strong once they are installed & braced as a system, but, they are surprisingly fragile as individual trusses. They have very little lateral strength or resistance to lateral forces.
The successful Erection of Timber Structures is possible through compliance with the National Building Regulations Requirements as contained in the SANS 102453 & SANS 10400(L) codes of Practice.
The role of the Inspector is therefor to check that these guidelines are carefully followed.
Pre-fabricated trusses that are handled with care, erected and installed properly, have proven their value in the industry. Unfortunately, their value is sometimes questioned when failure or collapse occur.
It is a fact that many roof structures fail during the construction phase while others take years for an incident to occur.
Incorrect loading or overloading during construction, like high winds or mishandling of trusses during erection, utilizing weak members or bad joint connections, damaged, broken or improperly repaired trusses, or installing unacceptable or unauthorized design changes on site.
These are some of the main reasons why trusses fail or collapse.
Then there is the problem of 3rd party interference after these structures were erected.
These mainly involve adding additional services like air conditioning systems, water system and electrical systems to the structures, which they were not designed for.
There is an International Residential Code of 2006 that states: “Truss members shall not be cut, notched, drilled, spliced or otherwise altered in any way without the approval of a registered Professional Engineer”.
How often have we seen these “remedies” done without any consultation, at the Erectors own discretion?
Structures with proper design and construction of bracing systems are essential in reducing and / or eliminating timber structure failures.
Roof Certification – ITC Accreditation
ITC Certified Roof Inspectors are deemed to be recognised as competent in their specific occupational professional designation. Members are awarded an ITC – COC number (Certificate of Competence) as a clear demonstration of their status under the National Qualifications Framework Act (Act 67 of 2008) and accredited by the South African Qualifications Authority (SAQA). This recognition is also recognized by statutory organizations like the NHBRC & the NRCS