Waterproofing services tender – SENTECH riversdale, western cape RFQ

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Bidders must meet all administrative responsiveness criteria including tax compliance and Sentech Supplier Database registration. Mandatory eligibility requires a valid COIDA Letter of Good Standing and a valid CIDB Certificate of 1SN grading or above. Bidders must attend the compulsory site briefing on 04 August 2026. The site foreman must have at least 3 years of experience in General Building and Maintenance. Bidders must demonstrate prior experience as main contractor in waterproofing works with verifiable completion certificates. A comprehensive Gantt Chart project programme with critical path analysis is required. Failure to comply with any mandatory criteria will result in disqualification. Bidders must achieve a minimum of 75 points on functional evaluation to be considered further.

1. Project objective

The objective of this project is to restore the waterproofing integrity of the existing

concrete roof and external building walls, prevent water ingress, improve

drainage, repair surface defects, and provide a durable weather-resistant finish

suitable for harsh environmental conditions.

The works include the removal of existing roof waterproofing systems, roof

repairs, replacement of screeds where required, installation of new torch-on

waterproofing membranes, waterproofing of external walls, crack repairs, and

application of a weatherproof paint system.

Bidders to attach CVs for site foreman with 3 years

of experience in General Building and

Maintenance)

Foreman/Supervisor with 3 years and more

20 points

Foreman with 1-2 years of experience but

Foreman with less than 1 years of experience or

The Contractor shall:

Use experienced waterproofing applicators.

Submit product data sheets.

Submit warranties.

Allow inspections during execution.

Rectify defects identified during inspections.

7. Completion requirements

The Contractor shall:

Clean the site.

Remove debris.

Submit completion report.

Submit photographic records before, during and after construction.

Submit warranties and maintenance recommendations.

8. Bill of quantities (boq)

Unit Total

Item No. Description Unit Quantity

Price Price

A.

Preliminaries

& General

Establishment, supervision,

A1 Item 1

safety files and compliance

Scaffolding, lifelines and fall

A2 Item 1

protection systems

Insurance required by the Item 1

contractor other than that

A3

provided by the Employer.

(All Risk Insurance)

Site establishment and

A4 Item 1

demobilisation

B. Roof

Waterproofing

Works

Remove and dispose

B1 existing waterproofing m2 215

membrane

Clean and prepare roof

B2 m2 215

surface

CCTV inspection of drainage

B3 Item 1

system

B4 Clean and clear roof outlets No. 6

Crack repairs and substrate

B5 Sum 1

preparation

B6 Demolish defective screeds Sum 1

New screeds with crystalline

B7 admixture (average 50 mm Sum 1

thick)

Supply and install 4 mm

B8 dual reinforced torch-on m2 215

waterproofing membrane

Waterproofing flashings,

B9 Item 1

upstands and penetrations

Polyester reinforced liquid

B10 m 56

mastic flashing strips

Coat the whole roof using

Reflect, a fibred liquid

aluminium coating which

B11 m2 215

offers U.V protection and

thermal insulation

properties. (Silver Kote)

C. External

Wall

Waterproofing

& Painting

Surface preparation and

C1 m2 880

cleaning of walls

Crack repairs and plaster

C2 m2 880

repairs

Waterproofing treatment to

C3 m2 880

external walls

C4 Primer coat m2 880

Elastomeric/rubber-based

C5 exterior paint (minimum m2 880

two coats)

D. Completion

Final cleaning and waste

D1 Item 1

removal

As-built photographs,

D2 warranties and handover Item 1

documentation

Tenderer's Summary

Section Amount (Excl. VAT)

Preliminaries & General R

Roof Waterproofing Works R

External Wall Waterproofing & Painting R

Completion & Handover R

Subtotal R

VAT (15%) r

Tender Total (Incl. VAT) R

Note: Roof areas and outlet quantities shall be verified during the compulsory site

inspection and measured by the successful tenderer prior to commencement of

the Works.

2. Site access

Access to Sentech sites is mostly by means of gravel roads. In some

instances, the roads may be paved with a bituminous surface in other

instances maybe concrete or concrete strips roads. The contractors are

requested to use 4 x 4 vehicles to access our sites.

Although we try our best to maintain these roads as best as possible some

of the paved and concrete roads cannot be accessed with an ordinary

vehicle.

Some may be very steep in places with very tight turns which would make

access difficult for ordinary vehicles.

unauthorized entry.

requirements.

4.2 Drainage System Inspection

VAT (15%) r

Tender Total (Incl. VAT) R

Note: Roof areas and outlet quantities shall be verified during the compulsory site

inspection and measured by the successful tenderer prior to commencement of

the Works.

over meeting. The Infrastructure Services Manager shall carry out

additional intermediate site inspections.

4.1.3.SENTECH Line of reporting problems

to the Operations Manager.

4.2. Quality assurance

carry out site inspections before, during and upon completion of the

contract.

4.3. Execution programme

8. Bill of quantities (boq)

Completion certificates to

Valid COIDA Certificate Attach a valid Letter of

Valid CIDB Certificate Attach a valid CIDB

waterproofing works. (Completion certificates to

Bidders to attach CVs for site foreman with 3 years

B-BBEE Details: the table below.

Evaluation Method 1. Stage 1 Administrative Responsiveness Evaluation

All the Quotations will be evaluated against the Administrative

responsiveness requirements as set out in section 1 of the RFQ Data.

2. Stage 2 Functional Evaluation Criteria

The proposals that COMPLY with the Mandatory evaluation criteria be

evaluated against the Functional Criteria. Suppliers meeting the minimum

requirement will be evaluated further.

3. Stage 3 Price and Preference

Suppliers with the lowest Price offered will score the highest points. Only

Suppliers that submit a valid B-BBEE Certificate can claim preference

points in line with the 80/20

Suppliers with the highest number of points will be recommended for the award of

this quotation, unless there are compelling and justifiable reasons not to do so.

Reference proof

What Proof is

supplied by

required to show

Compliant reference the page

Mandatory Eligibility compliance to

(Indicate Yes or number where the

Criteria Mandatory Eligibility

No) information is

Criteria

located in your

Tender submission

Valid COIDA Certificate Attach a valid Letter of

Good Standing from

the Department of

Labour/FEM

Valid CIDB Certificate Attach a valid CIDB

Certificate: 1SN and

above

Reference proof

What Proof is

supplied by

required to show

Compliant reference the page

Mandatory Eligibility compliance to

(Indicate Yes or number where the

Criteria Mandatory Eligibility

No) information is

Criteria

located in your

Tender submission

NOTE: Bidders that do not comply with all the above criteria will not be evaluated further.

Annexure 1 to be fully completed. If not completed, bidders will be disqualified

1.1. Functional Evaluation Criteria

Proof Points Functionality criteria

Required

Appointed service provider will be required to compile a health and

safety file in line with Sentech requirements which will be communicated

upon appointment, and such should be submitted to the Sentech OHS

Specialist within 7 days after issue of the Purchase Order/Safety File

Specification (instruction to be received from the Infrastructure Services

Manager via email).

Competent mast climbers Valid mast climbing certificate for each

employee to be signed to the project.

Medical fitness Valid certificate of fitness (medical) issued by

Occupational Medical Practitioner only for all employees to be assigned

to the project

Work method Detailed safe working methodology on undertaking

assigned task in line with the requirements

Public liability valid construction/project public liability insurance

Health and safety compliance assurance Health and Safety

compliance undertaking by the CEO/Managing Director

COID / FEM registration for injury on duty cases

4. Communication protocol

4.1.1.SITE Hand over meeting

This is the official hand over of the site to the contractor for the duration of

the contract. This is the first meeting on site of all the relevant parties who

will be involved in the contract for its entire duration.

4.1.2.PROGRESS Meetings

The intervals of progress meetings should be decided at the first site hand

over meeting. The Infrastructure Services Manager shall carry out

additional intermediate site inspections.

4.1.3.SENTECH Line of reporting problems

Any problem, which may arise during the contract, should be reported

immediately to the Infrastructure Services Manager.

If the Infrastructure Manager is not available, it should be reported directly

to the Operations Manager.

4.2. Quality assurance

Quality assurance inspection will be carried out at all the key dates and

milestones established at the site handover meeting.

The Infrastructure Services Manager or Sentech trade tested rigger shall

carry out site inspections before, during and upon completion of the

contract.

4.3. Execution programme

Timeous completion of the project is of utmost importance for Sentech.

To ensure and to assist the contractor to monitor his or her own progress,

he or she will be required to provide Sentech with a detailed execution

schedule when providing a quotation.

This schedule should be in the Bar Chart format.

It should highlight the following key information but not limited to:

Name of site

Activity description

Activity duration

Dates for key milestones during the execution of the

Projects.

The key milestones are of paramount importance. Key dates will determine the

Sentech Rigger will conduct site inspections.

Photos must be taken before, during and after as part of in-progress

reporting by the contractor

Milestones will include times such as but not limited to:

Milestone 1:

When the surface preparation has been completed.

Milestone 2:

Quality inspection must be conducted on completion of each coat of paint

before applying the next coat.

Milestone 3:

As soon as one section received its final coat of paint, a quality inspection

should be conducted before moving to the next section.

5. Constraints

unpredictable.

Occupational Health & Safety regulations determine that mast work can

only be performed under specific weather conditions.

Inclement weather conditions remain the single biggest constraints to

timeous completion of mast painting projects.

It should be borne in mind that in addition to normal inclement conditions

some sites may be affected by high winds and mist at certain times of the

day.

Contractors are therefore urged to familiarize themselves with the historic

prevailing weather conditions of the specific region.

The contractors must therefore allow for inclement weather-related delays

in theirs schedule. Any inclement weather days and consequential inclement

weather days accumulated during this contract will be granted as extension

of time as there will be no monetary compensation.

6. SENTECH house rules

It is the responsibility of the contractor to familiarize himself with Sentech

House Rules for external contractors working on a Sentech site.

The site must be kept clean at all times. All debris and any other foreign

material must be disposed of at a designated landfill site where required.

disadvantaged by unfair discrimination on the basis of race, gender and disability. The

Reconstruction and Development Programme as published in Government Gazette No 16085

dated 23 November 1994

Occupational Health and Safety Act (Act ).

Project Duration shall be 8 weeks from the date of safety file approval.

A1 Item 1

safety files and compliance

access difficult for ordinary vehicles.

unauthorized entry.

3. Safety requirements

safety file in line with Sentech requirements which will be communicated

upon appointment, and such should be submitted to the Sentech OHS

Specialist within 7 days after issue of the Purchase Order/Safety File

Specification (instruction to be received from the Infrastructure Services

Manager via email).

milestones established at the site handover meeting.

he or she will be required to provide Sentech with a detailed execution

schedule when providing a quotation.

The Works shall be executed in accordance with:

General Conditions of Contract for Construction Works (GCC 2025), 3rd

Edition.

Occupational Health and Safety Act (Act ).

Construction Regulations.

Applicable SANS Standards.

Manufacturer's specifications for all waterproofing products.

Employer's specifications and instructions.

Defects Liability Period

The Defects Liability Period shall be twelve (12) months from the date of

Completion.

Warranties

The Contractor shall provide:

60 months workmanship warranty.

Manufacturer warranties for waterproofing membranes, coatings, paints,

sealants and associated products.

Project Duration

Project Duration shall be 8 weeks from the date of safety file approval.

3. Technical scope of works

3.1 Preliminary and General

The Contractor shall:

Attend compulsory site inspection.

Verify all quantities and dimensions.

Provide supervision, labour, materials, tools, equipment and transport.

Establish and maintain site safety measures.

Provide scaffolding, lifelines and fall arrest systems.

Protect existing infrastructure during construction.

Remove all waste from site upon completion.

4. Roof waterproofing works

4.1 Roof Preparation

The Contractor shall:

Remove existing waterproofing membranes.

Remove all loose materials.

Dispose of demolished materials at an approved disposal facility.

Clean roof surfaces thoroughly.

Remove contaminants including oils, grease and dirt.

Prepare surfaces in accordance with waterproofing manufacturer's

requirements.

4.2 Drainage System Inspection

The Contractor shall:

Inspect all roof outlets and drainage systems.

Clean and clear all full-bore outlets.

Conduct CCTV inspection of drainage pipes.

Remove all blockages.

Report damaged pipework requiring repair.

4.3 Outlet Treatment

The Contractor shall:

Remove outlet leaf guards and steel clamping rings.

Dress waterproofing membranes into outlet throats.

Seal all outlets.

Clean and repaint steel components.

Reinstate outlet assemblies.

4.4 Crack Repairs

The Contractor shall:

Repair substrate cracks.

Repair honeycombing and voids.

Fill imperfections using approved repair mortars.

Ensure surfaces are sound before waterproofing.

4.5 Roof Screeds

The Contractor shall:

Remove defective screeds where falls are inadequate.

Supply and install new screeds.

Incorporate approved crystalline waterproofing admixture.

Form minimum falls of 1:100 towards drainage outlets.

Average screed thickness approximately 50 mm.

4.6 Waterproofing System

The Contractor shall supply and install:

4 mm dual reinforced torch-on waterproofing membrane.

Fully bonded waterproofing system.

Waterproofing to all roof surfaces, upstands, flashings and penetrations.

Minimum 75 mm side laps.

Minimum 100 mm end laps.

200 mm polyester reinforced liquid mastic flashing strips to all termination

points.

Supply and apply Silvercoat

All waterproofing shall be installed strictly in accordance with manufacturer's

specifications.

5. External wall waterproofing and painting

Area

Approximate wall area: 880 m2

5.1 Surface Preparation

The Contractor shall:

Inspect all external walls.

Remove loose and flaking paint.

Remove mould, algae and contaminants.

Pressure clean wall surfaces.

Prepare surfaces for waterproofing and painting.

5.2 Crack Repairs

The Contractor shall:

Open and repair cracks.

Apply approved crack repair compounds.

Repair damaged plaster.

Prepare surfaces for waterproofing.

5.3 Wall Waterproofing

The Contractor shall:

Apply approved waterproofing treatment to all external walls.

Treat joints and vulnerable areas.

Apply waterproofing in accordance with manufacturer's recommendations.

5.4 Painting

The Contractor shall:

Apply primer coat where required.

Apply premium quality elastomeric/rubber-based waterproof exterior paint.

Match existing building colour.

Apply minimum two finishing coats.

proof of insurance and any other documentation to be provided in terms of the conditions of contract identified in

the RFQ. Failure to fulfil any of these obligations in accordance with those terms shall constitute a repudiation of

this agreement.

The Defects Liability Period shall be twelve (12) months from the date of

60 months workmanship warranty.

Minimum 75 mm side laps.

Minimum 100 mm end laps.

200 mm polyester reinforced liquid mastic flashing strips to all termination

points.

A2 Item 1

protection systems

Insurance required by the Item 1

contractor other than that

A3

provided by the Employer.

(All Risk Insurance)