The purpose of this Method statement is to define the
procedure for Swimming pool, finishes + Waterproofing and its related
activities necessary to complete the work, in order to ensure that all the
works are conducted in a systematic and safe
manner with the use of good engineering judgement in accordance with the
requirements specified in the relevant specifications, procedure and drawings,
considering safety and quality of the
work activities.
Scope of work.
The scope of the work in this method statement covers the
detailed procedure to be followed for
Finishes (Civil works) & waterproofing, works that shall be carried
out under controlled condition in
accordance with project specifications and approved drawings at permitted
areas. Reference as per below:
- Approved shop drawing
- Approved samples
- Approved Mock-Ups
- Project specifications
- Material Safety Data Sheet
- Material Submittal
- Project Management Plan
- Codes of Construction and Safety Practice
- Project Health and Safety Plan
- Risk Assessments
LOGISTIC (MATERIAL, EQUIPMENT & PLAN)
- Auto Level, Total Stations
- Water Jet Blade cutting station.
- L Square, Trowel, Plumb bob, spirit level, Chisel, Hammer.
Procedure.
The sequence of works outlined below is to be strictly
followed to ensure the safety of all Employees during the waterproofing + Civil
Works (finishes)
Production.
The subcontractor purchasing department shall liaise with
the commercial department and prepare a detailed material list for each item in
accordance with the approved shop drawing.
Supplier’s Quantity control shall take care of the quality
issues if any of the material is once approved and passed by their QC team. The
materials shall be stacked in pallets, protection wrapped around them awaiting
delivery call of from site. When materials are delivered to site the QAQC Team
and contractor/consultant representative along with the storekeeper shall
inspect all goods for conformity. If a non-conformance arises swimming pool
subcontractor shall issue the supplier an NCR. Material noted not in
conformance with the specification to be marked and removed from the site.
Delivery, Storage & Handling.
All records of stock material at the storage area shall be
recorded and labelled stating intended location for installation on the
project.
All materials shall be marked and monitored by Team
Storekeeper.
Materials for Swimming Pool shall be stored.
Unless materials are near the intended installation area and
are in the process of installation, materials shall be protected as
appropriate.
Protective tapes/coverings shall be made to protect the
stored materials of unique nature and specification,
materials shall be stoked in groups to increase efficiency of site deliveries.
Delivered Material should be raised for a Material
inspection subject for acceptance and
approval from the consultant.
Waterproofing procedure:
Mapelastic Smart A + B & Mapetex Sel
)or any other material).
Mapelastic Smart:
Two-component, highly flexible cementitious mortar (with crack- bridging
capacity >2 mm), to be applied by trowel or with a roller, for the
waterproofing of balconies, basins, swimming pools and wet areas.
Mapetex Sel: Non-woven, macro holed polypropylene fabric for
reinforcing waterproofing membranes.
Once Guniting operation was completed, site engineer will
prepare the surface prior application of the waterproofing. Clean the surface
and remove any un-sound or loose material. Prior to application, the substrate
must be well cured, mechanically strong, and dry. Remove traces of oil, grease
paint, wax, or any contamination. Inspection to be submitted once surface found
to be satisfactory.
Waterproofing Membrane – Mixing
Pour component B (Liquid) in to a suitable, clean, rust-free
mixing container.
Slowly add component A (Powder) of MAPELASTIC SMART whilst
mixing using a slow speed mixing drill at 500 RPM fitted with a suitable mixing
paddle.
Mix for 2 to 3 minutes ensuring to scrape nay unmixed powder
from the bottom and the sides of the container. Keep Mixing until a lump free
homogenous mix is obtained.
Mapelastic smart is to be applied at the rate of 1.6kg/m2/mm
per coat in two coats.
Cut Mapetex Sel roll into appropriately sized sheets. Roll
and keep aside.
Good waterproofing detailing for corners, pipe penetrations
and water traps shall be observed, ensuring to fix individual pre-cut pieces of
Mapetex sel (200mm minimum width of band) as a banding system at all corners
and penetrations.)
Apply a 300mm wide band of Mapelastic smart coating at a
thickness of 1mm to the detailing area ( on the horizontal and vertical
surfaces)
Install a 200mm wide strip of Mapetex Sel into the center of
the first layer or Mapelastic Smart. Press will into the previous layer of
Mapelastic smart whilst it is still wet with edge of a flat steel trowel or a
roller to ensure Mapetex sel is fully embedded into the first layer of
Mapelastic smart. Avoid application of excessive material in the corners and
ensure that the Mapetex sel is fully dressing the corner.
After 4+5 hours or when the first layer has dried, apply a
further 1mm thick application of
Mapelastic Smart to the top surface. Extending this layer
beyond the Mapetex sel by a minimum of
5cm.
Any side or end overlaps of Mapetex sel fabric shall be at
least 5cm wide.
After treatment of all corners and penetrations apply a 1mm
thick coat of Mapelastic smart to the remaining areas using a roller, brush
trowel.
Apply the second layer of Mapelastic smart after 4-5 hours
or when the first layer has dried.
Apply the 3rd later of Mapelastic once 2nd layer is dried.
Coats shall be applied perpendicular to each other to ensure
total coverage of any application imperfections.
Mapelastic smart can withstand light foot traffic after
drying. The membrane shall be protected against sharp object penetration or
mechanical damage.
Allow a minimum of 5 days for the Mapelastic smart to cure
before application of ceramic tiles. At higher temperatures this period can be
reduced to no less than 3 days after application.
Once completed flooding to commence. Inspection for Flood
Test to be submitted to the
engineer representative after 72 hours. Final water level to
be mark with tape indicating the date and time it was completed (Photo to be
attached on the WIR). If incase there is a loss of water. Specialist to
thoroughly inspect the area and re – do the surface where leakage is suspected
until satisfactory.
Civil Works (Installation of Stone and Coping).
Installation of the edge and tiling will follow the
completion of cementitious waterproofing for the wall and channels. The substrate must be
adequately cured, mechanically sound, and free of loose particles, grease, oil,
paint, wax and other deleterious material or surface contamination should be sufficiently dry.
Adhesive - is applied
to the substrate using a notched trowel. To achieve good adhesion, first apply
a thin layer of adhesive on the substrate using the straight edge of the
trowel. Immediately after; apply the desired thickness of using a suitable notched
trowel, depending on the type and size of the tiles. (For adhesive mixing
preparation.
Setting Out – The concerned area of the edge tile will be
set out with reference to primary setting out points. Subcontractor surveyor to
ensure that rows of edging are true in level and line should be established prior to starting the works. 1
row of stones will be installed on the line of marking which will serve as a benchmark of the
installation of the pool. This activity should be executed as per the approved tile layout drawing.

Laying of Stone(s) / Coping Tiles – Before installing tile,
the tile(s) shall be buttered and laying of
tile(s) work shall be starts after the cementitious waterproofing. Work
should be planned to start fixing from
the top portion of the pool or Water Feature (Wall). Cut courses in both
directions should be determined in advance. Where possible, cut tiles should be
avoided by slightly adjusting the tile joints within the finish material if
possible. To ensure that rows of tiles are true, a level line should be established to
position the starting course. Cut pieces around inlet, Vacuum and drainage
points shall be installed properly. (WIR) to be submitted upon completion of the tiling.
Grouting of Joints – The joints must be dry, clean, free of
dust and emptied at least 2/3 of tile thickness. The excess adhesive or mortal
should be removed while still fresh. Before grouting, make sure that the
installation mortar or the adhesive has set and released most of its
moisture. For application of grout –
spread the approved grout with the float, making sure the joints are filled.
Use the same float, but on the edge to removed excess grout. After finishing
the grouting application. Wet the
surface thoroughly and emulsify with an abrasive pad for cleaning joints.
Making sure not to wash-out the joints.
Note: All joints should be raked out and cleaned from any
contaminants prior to grouting.
Inspection request to be submitted upon completion of Grouting.