Façade Weatherproofing

HYER STANDARD

PROCEDURE

Purpose and Scope

The purpose of this procedure is to ensure that the façade weatherproofing works on Hansen Yuncken projects are constructed in accordance with relevant Standards, project documentation, and HY processes.

There are various types of façade materials to consider regarding weatherproofing of a building’s façade. Types of facades includes, but is not limited to the following:

Aluminium Composite Panels
Non-combustible cassette cladding
Interlocking solid aluminium panels
Pre-finished high density fibre cement panels.
Brickwork and Stonework (Masonry)
Precast Concrete Panels
Insulated Render
Metallic Cladding
Tiles and Stone veneer panels.
Glass and steel façade systems (Curtain walling)
Natural and wood panelling

Responsibilities

Project Manager

Ensuring design changes are assessed for constructability risks.
Ensure any design constructability risks are assessed, controlled, and documented in the Project’s Risk Register.
Ensuring any constructability risks identified are communicated to workers performing the work and the HY project team.

HY Project Team

Obtaining and reviewing project documentation, drawings, and specifications.
Managing workflows to document RFIs and design changes.
Managing the project’s document registry and communicating documentation to relevant parties.
Communicating requirements for submittals, warranties, and inspection and test plans to Subcontractors and other parties as applicable.
Ensure nominated subcontract users are registered in the QA platform and invited to the Project Profile.
Ensuring relevant quality control pre-work checks are complete prior to starting works.
Ensuring any applicable hold and witness points are in place and adhered to.
Receiving and controlling submittals, warranties, and inspection and test plans.

Subcontractor Supervisor

Ensure personnel responsible for using the QA platform are registered and have means to access the platform via mobile or desktop devices.
Ensuring relevant quality control pre-work checks are complete prior to starting works.
Ensuring any applicable hold and witness points are adhered to.
Providing any required submittals, warranties, and inspection and test plans.

Quality Verification

Hansen Yuncken predominantly utilises Autodesk platforms (BIM360 and ACC) to carry out quality control checks and verifications. Subcontractor supervisors or nominated representatives must have a registered Autodesk account and be invited onto the Project Profile by the HY project team.

The Façade Weatherproofing Checklist in the QA platform is to be completed prior to and throughout the relevant stages of works. If the specified façade system is a curtain walling system, use the Curtain Wall Manufacture and Curtain Wall Installation checklists in the QA platform. HY representatives are responsible for completing the header and site preparation sections. The subcontractor representatives are responsible for completing their respective sections respectively. All hold points must be adhered to and verified by the HY representative to proceed.

Guidance on the use of software for Subcontractor users can be accessed via the Onboarding Induction and Training Procedure.

Note: Defence Projects and select Government Projects may have unique requirements regarding Quality Control and the use of software packages to carry out verifications. The agreed methods and software packages will be determined at Project Commencement considering the specific project needs and client requirements.

Preparation

Project drawings and specifications will detail the locations and requirements of the façade system and materials to be installed. The latest revisions of drawings and specifications are to be referenced for the works, which are to be provided to the subcontractors carrying out the works.

Approvals

Submittals, samples, and materials are to be identified, reviewed, and approved by the respective responsible parties in accordance with project specifications prior to works beginning. Any changes are to be captured via appropriate channels for the project (e.g., Aconex Workflow) and communicated to workers.

The façade cladding and associated fixings, sealants, and sarking materials are to be verified in accordance with the project drawings and specifications. The following items are to be confirmed:

External materials type, profile and colour is approved
Sarking/insulation material is in accordance with the specified requirements and is the correct R-Rating
Confirm the correct fixing types have been selected and are in accordance with specifications and manufacturer’s requirements
Confirm all sealants are the correct grade, colour, and type
Subcontractors ITPs

Supporting Structure

The supporting structure subcontractor is required to provide the desired wind loading requirements, and prior to any substrate works proceeding the following items must be actioned:

Hansen Yuncken must receive confirmation from the that the structure has been constructed in accordance with design and project specifications and that façade cladding works can proceed
The supporting structure, substrate or framing system has been inspected and accepted by the external finishes subcontractor to proceed with cladding and weatherproofing works
If the external cladding is a curtain walling system the structure, block outs, slab edges and connecting dowels must be surveyed to confirm dimensional accuracy to the for-construction drawings

Installation

Depending on the type of external cladding to be installed, there are similar installation processes which are required to weatherproof the building. Prior to installing the external cladding, the following must be confirmed:

Structure/framing system surface is vertical or correct grade and aligned
All cast in anchors, other anchors, fixing locations and spacings have been installed in accordance with specified requirements
Joints are provided as detailed and are perpendicular and horizontal and correctly aligned
Joint widths have been installed in accordance with specified requirements and are within tolerance
All penetrations for grilles, louvers etc. are in the correct location and size
Sarking taped and installed to manufacturer specification
Sealant has been finished and visually inspected to be to an acceptable standard
Façade element is installed in accordance with specified requirements and visually inspected to be to an acceptable standard

Specifications and Compliance

Current Project Specifications are to be used to confirm all approvals, samples, and submittals required for the project. Project Specification requirements are to be entered into the Project’s Compliance Schedule.

The following approvals/samples may be required:

Samples – external finishes
Subcontractor ITPs

The following supporting documentation or submissions may be required from the subcontractor:

External Finishes material certificate of compliance
Sarking/insulation certificate of compliance
Certificates of Installation for completed works

Hold/Witness Points to be adhered to throughout Wet Area Construction works:

Supporting structure has been signed off by structural engineer for wind loading requirements
Substrate, supporting structure or frame have been accepted by External Finishes subcontractor
Material and colour are in accordance with approved sample
Inspections as specified

Definitions

ITP – Inspection and Test Plan

NCC – National Construction Code

RFI – Request for Information

References

NCC – Volume 1, Part F3
AS 1530.1 – Methods for fire tests on building materials, components, and structures Part 1: Combustibility test for materials.
AS 1768 – Lightning protection
AS 1882 – Earth and bonding clamps
AS 4654.1 – Waterproofing membranes for external above-ground use Materials.

Associated Checklists and Documents

Façade Weatherproofing Checklist (Autodesk)
Work at Heights Procedure and HYer Standard