Roof Cladding | Wall Cladding Method Statement

Below is a precise method statement for installation of insulated roof cladding and wall cladding installation.

List of necessary plant, machinery, materials and tools:

Lifting Equipment

• 50 ton mobile crane (2 No.)
• 25 ton mobile crane (4 No.)
• 3 ton telescopic boom loader
• Scaffoldings
• Man lift

Electrical equipment

• Generator
• Drill (110 volts)
• Screw gun
• Electrical nibbler
• Industrial multi sockets
• Cutting Machines

Cladding materials

Roof and wall sheets (0.8mm thick aluminum outer skin w/ 45/250 trapezoidal profile & 0.5mm thick inner skin w/ 50mm thick Core Polyurethane foam)

Fasteners/Aluminum rivets (4.8mm dia.)

Mastic sealant (12×3 mm Polybutylene)

Flashing material

External – 1.0mm. Gauge plain aluminum sheet

Internal – 0.50mm. Gauge plain stucco embossed aluminum sheet

Roles and Responsibilities

Project manager: Is over all responsible for the implementation of approved cladding method statement, specifications, drawings, and ensure that his team of engineers and foremen are aware of it; all resources, humans, materials, and equipment are available to carry out the work as planned without any delay.

QA/QC Engineer

Coordinate ITL (inspection and testing LAB) and engineers with respect to all matters related to inspection and testing.

Follow up with ITL for material inspection, test reports, test certificates are submitted to main contractor in timely manner.

Carry out required inspection to ensure compliance with specified specifications requirement and approved drawings.

Make sure that all necessary information is neatly presented and submitted to main contractor.

Ensure all the equipment used at site is suitable and fit for the purpose in serviceable condition and acceptable by consultant.

Ensure the site area clearances are taken before receiving the material and erection on site.

HSE Officer

Report to the HSE manager and ensure the availability of safe working conditions and environment on the project.

Ensure that all activities related to the execution of the project are carried out in safe conditions.

Implementation of project HSE manual requirements as well as project contractual hse requirements.

Ensure that all machinery and equipment are properly maintained in order and are in safe working conditions.

Make sure that all plants and equipment are tested and inspected before use on site.

Coordinate with client representative/main contractor on all matters related to health, safety and environment.

To coordinate with the local authorities to certify the equipment and machinery so that they are in safe working conditions.

Overall responsibility for ensuring the implementation of the project specific HSE Plan and Procedures.

Overall responsibility for ensuring the implementation of the applicable HSE National and International requirement.

Cladding Erection Engineer: He is responsible to carry out the work as per the approved drawing, method statement, with coordination with all parties like QA/QC Engineer, Site Engineer, Subcontractors etc. He is also responsible to ensure adequate equipment and materials are in place.

Cladding Erection Foreman

Distribute the erectors for the site work requirements.

Supervise the erectors productivity and their work as planned on daily basis.

Inform/report steel erection engineer/supervisor in case of any problem or comments during site inspections.

Prepare all required machines/tools for the cladding works.

Site Planning & Preparation

Transportation:

Articulated Lorries are generally used for delivery and it is normally the responsibility of the recipient to arrange the provision of suitable equipment for off-loading.

A crane with slings and spreader bar or a forklift truck will usually be required.

Composite panels sheet may be delivered by curtain sided vehicles to afford optimum protection.

Forklift trucks should be used for off-loading.

Each day prior to commencement of work lift plan would be prepared by safety personnel and shall be exercised during similar activity at site.

Material Handling:

Compared with panels manufactured from other material, cladding composed of aluminum with rigid polyurethane foam core is lightweight having density of about 35kg/m3, enabling long sheets to be handled with ease and with a minimum of operatives.

If a crane is used for unloading, at least two slings should be used – single sling should NEVER be used.

Unprotected chains, bars or fork trucks will damage the sheet, particularly at the edges, and should be avoided. Always ensure that packs of sheet are securely banded before lifting.

When handling individual sheets, care should be taken not to damage edges or corners, as they may interfere with sheet laying operations and, prevent the achievement of a weatherproof seal.

Insulated sheet should be lifted from beneath the bonded insulation and never by the aluminum alone as this may cause the bond between the sheet and the insulation to break.

Other way of lifting by fork lift, the panels should be placed on the fork at equal length side by side in order to balance the weight to avoid the possible drop off of the said materials and to ensure the maximum loading capacity of the fork lift must be attained.

Storage of Roof Wall Cladding Materials

Ideally, cladding should be stored under cover in the original packing and in a dry, well-ventilated locations.

Even crated material should be stored under cover, to protect it from the weather.

It is important to keep the sheets well away from building operations where they could be contaminated with lime and cement, which would cause staining.

If they are stored for more than a short time out of their packaging, precautions should be taken to see that moisture is not allowed to percolate between them.

If sheets are stored in the open they should be kept off the ground and covered with polythene sheeting.

Care must be taken to ensure that the timber battens used in building the stack are aligned and keep the tarpaulin off the metal.

Wet tarpaulins in contact with bare sheet should be avoided.

When covering sheets with tarpaulins it is important to ensure there is adequate ventilation to prevent condensation occurring.

Stacks of loose sheets should not be built too high or the bottom sheets may spread.

Project Site Condition: Work would be proceeded only when/depending on actual site condition and weather forecast so that damages might occurred would be prevented.

Field Measurements: Site Cladding Engineer is in-charge in the overall measurements with the assistance of a foreman who would strictly check in order to ensure locations of structural members, openings etc. would be traced out in accordance to the approved drawings.

Coordination: Before the commencement of cladding activities, any other trades such as MEP, related subcontractors and main construction team would conduct a coordination meeting on regular basis in order to facilitate/assist the activity at site in smooth progress and to complete the project without any mistakes, nonconformity being made.

Safety Roles and Responsibilities

HSE officer will be involved in all safety measures related cladding activities. Environmental officer shall be checking and handling oil spillages and responsible to maintain good housekeeping.

Safety team will make sure that fixing team is having relevant electrical equipment and hand tools to adequately perform the installation work.

Pre Erection Checks

Materials arriving on site should be checked immediately for quantity, type and dimension against appropriate Advise Notes.

Particular care should be taken to ensure the safe receipt of small parcels containing fasteners, mastic etc.

When signing Advise Notes for sack or bundles etc., it is only necessary to check the type of contents and number of sacks, bundles etc.

Prior to commencing installation, visual checking would be carried out for the secondary steelwork.

Any obvious problems should be pointed out immediately to allow remedial work to be undertaken before the cladding fixer begins work.

Fixer must ensure that all relevant drawings and fixing instructions are available.

These should be consulted and understood before commencing erection drawings with reference numbers.

Drawings, fixing instructions and Advice Notes, together should be kept in safe place on site.

BUILDING FRAMEWORK:

The frame of the building must be checked for the following before commencing installation.

Frames would be checked by using man lift to ensure horizontally and vertically wise, the frame is in true line and plumbed respectively.

• Purlins and rails are at correct spacing as shown on erection drawings and are all in one plane.
• Overall dimensions of roof or wall correspond with those shown on erection drawings.
• Corner of roof are square and wall steelwork is perpendicular.
• No protrusions occur on the face of the steel work, such as bolt heads, rivet heads, splice plates etc.
• Work carried out by preceding trades (gutters, glazing, steelwork, painting etc.) is completed.
• Where dwarf walls occur, they are of correct height and positioned as shown in the erection drawings.
• Details and positions of openings, i.e. doors, windows etc. are as shown on erection drawings.

IMPORTANT: Ladder would be securely fixed, inspected and tagged before the access lifting points.

SEPARATING SHEETS:

Care must be taken when separating items in packs, to ensure that damage does not occur to the coating.

They should be separated with a series of jerking movements, rather than one continuous movement.

During the hot weather, it is best to separate protected metal components early in the morning before the sun has heated the packs.

Work Methodology for Roof Cladding:

The first line of installation for roof cladding would be at end wall laid along the truss/rafter and must be carefully aligned, fixed temporarily with 115mm. long, 6.3mm diameter self tapping stainless steel fasteners with neoprene washers and PVC color cap.

Fixers would use 110-volts power tools for fixing and working from a Manlift.

First sheet of the first line would be lifted by crane to be laid out starting from the eaves held to 50-50-50mm Z- angle spacer fastened with 25mm. long 6.3mm. dia. Self tapping stainless steel, the second and third sheet towards the ridge then it can be finally fastened prior to proceed the succeeding line but before fixing of any fasteners sheets must be correctly aligned at right angles in relation to ridge and eaves line of building.

Ridge:

Crimped ridge would be laid after the installation of roof sheets at each gable.

Flashing of 400 mm. width would be fixed at inner skin of roof panel by blind rivets at 400mm. center to center.

Flashing when securely fixed 50 mm. thick polyurethane insulation would be place on it then a 3x9mm polybutyl sealant tape would be placed on sheet/outer skin of panel at three (3) rows side by side from the edge of the panel.

Once the preceding works has been completed a 600mm. width crimped ridge would be fixed to panel and fastened with blind rivets at distance of 250mm. center to center.

The ridge will be installed as the roof sheets are laid ensuring all holes are covered.

Wall Cladding Installation Methodology

Wall cladding installation shall commence after the full completion of the roofing installation.

But before works proceed deeply check for the alignment of the rails, ensure that rail is in true line and plumbed and must be done by cladding engineer assisted with foreman.

Curved Sheet / Eaves:

Curved sheet would be laid in position temporarily in line with the wall & steel work. Ensure sheet secure in position.

Flashing:

All corners such as roof end wall, wall, and openings shall be covered with 1.0mm. Gauge plain aluminum sheet stitched with 4.8mm dia. by 11.5mm. Long rivets spaced at 350mm center to center.

Details for each corresponding length and width of flashing can be found on approved shop drawings.

Inspection:

Prior to Installation of Roof and Wall Cladding, ensure IRF for steel erection is already approved and no NCR is open.

For each bay when works are completed, Inspection request would be submitted to the Client for approval prior to start of the succeeding bays.

In-Situ Testing

Water Spray Test shall be conducted by Independent Testing Laboratory, One Test after full installation.

THE FOLLOWING MUST BE UNDERTAKEN BEFORE COMPLETION:

Check that fasteners have not been omitted and that they present a uniform pattern.

Check that runs of flashings present a straight and neat appearance.

Check that all mastic sealing and flute closers have been fitted where required.

Ensure that all drill waste is removed from the sheeting.

Ensure that all other waste and un-required packaging stemming from fixing operations are collected and disposed as required.

Cleaning would be done periodically and during works by the assigned person to comply on safety requirements, housekeeping and to maintain neat aesthetic on completed work.

Site to be kept clean and tidy and all rubbish placed into garbage containers.

Health and Safety

Each day prior to commencement of work lift plan would be provided by safety personnel and shall be exercise during similar activity at site.

Pre start meeting would be conducted by site in-charge/site foreman prior to start the activities.

Work Review Checklist

Has the MS been signed off by all designated persons?

Does the title of the MS relate to the information contained within?

Does the MS follow the recommended format?

Has the scope of work been well defined?

Has all major equipment required been identified?

Have all materials been identified for the work activity?

Is the site planning and preparation specific to the work location?

Has a sketch of the worksite been included?Does the sketch/site planning identify areas for material storage?

Does the sketch/site planning identify access and egress?

Does the sketch/site planning identify interfaces with other contractors?

Is the work methodology logical and easy to follow?

Has the person(s) in charge of the work been identified?

Have all the trades required for the work activity been identified?

Is a risk assessment included in line with the template?

Is the risk assessment specific to the work activity addressing all the hazards from the work methodology and site plan?

Are the recommended control measures specific and easy to understand?

Have specific emergency instructions been included?

Have appropriate rescue plans been included for critical safety tasks i.e. rescue from persons at height?

Has the quality requirements table been updated?

Have all the relevant documents required to complete the work been submitted and accepted (not required to be attached)?

Are the references correct to the documents listed?

Has the briefing sheet template been attached to the MS?