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Torch application at a bituminous waterproofing upstand

Assess before application

Waterproofing is a continuous system, not an isolated product

A visible leak does not always reveal the source of the defect. Substrate condition, falls and outlets where relevant, upstands, junctions and penetrations need to be read as one assembly.

ZF PRO works on roofs, terraces and exposed areas in Tangier, selecting preparation and the solution family after assessment. Execution details remain specific to the substrate and actual system selected.

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Areas to review

Where continuity has to be controlled

Open field areas matter, but junctions and penetrations often concentrate the most demanding details.

  • Open field areas

    Review of the surface, its condition and the possible continuity of the system over the main area.

  • Upstands and perimeters

    Assessment of vertical returns, wall junctions and connections around the edge of the structure.

  • Rainwater outlets

    Review of the area around outlets and their integration with the system where relevant.

  • Penetrations and junctions

    Appropriate treatment of penetrations, joints and interfaces with other building elements.

Waterproofing membrane being installed on a roof in Tangier

Assessment and preparation

Substrate condition and details govern the system’s performance

Before work, ZF PRO reviews the surface, defects, interfaces and sensitive areas. Local repair or more extensive preparation may be required before the new system.

The assessment also considers whether an existing system can remain, be repaired or needs a different intervention.

  • Condition and cohesion of the substrate
  • Falls and water flow where relevant
  • Upstands and perimeter junctions
  • Outlets, penetrations and other details
  • Necessary repairs and preparation
  • Compatibility of primer and selected system
  • Protection or finish included where required

System families

Traditional or liquid waterproofing according to the project

ZF PRO assesses traditional and liquid systems according to the substrate, structure geometry and intended use.

  • Traditional waterproofing

    A system installed according to its build-up, required preparation and complete treatment of junctions.

  • Liquid waterproofing

    A continuous solution that may suit certain configurations, subject to compatibility and suitable preparation.

Technical sequence

Five stages for a structured intervention

  1. Assessment

    Identify visible defects, substrate condition and constraints in the area.

  2. Substrate

    Clean, prepare and repair according to the needs found on site.

  3. Critical details

    Treat upstands, outlets, junctions and penetrations within the selected system.

  4. System

    Install the chosen solution in line with its documentation and site conditions.

  5. Control

    Review visible continuity, details and finishing before completion.

Situations assessed

Roofs, terraces and exposed technical areas

Each situation calls for a review of the existing substrate and the way the area is used.

  • Roof terraces

  • Accessible terraces where suitable

  • Exposed technical areas

  • Upstands and parapets

  • Outlets and penetrations

  • Refurbishment projects

Related trades

Connect this service with the other needs of your site

ZF PRO thermal and acoustic insulation

Review the junctions between insulation and envelope waterproofing.

Thermal and Acoustic Insulation

View service
Modern interior after renovation in Tangier

Include waterproofing repairs in work on an existing building.

Interior and Exterior Renovation

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Foundation construction site supervised by ZF PRO in Tangier

Plan waterproofing interfaces within construction phases.

Construction of Houses, Villas and Buildings

View service

Qualification and trade

Why entrust your waterproofing work to ZF PRO?

Official ZF PRO qualification and classification certificate

The certificate lists general waterproofing work. Roof and terrace treatments are coordinated with access and other work on the structure.

Certificate valid from 30/10/2025 to 29/10/2026.

  • N.1 Standard waterproofing works

In practical terms : This field covers standard waterproofing and thermal insulation. Acoustic requirements are assessed separately.

All fields are detailed on the About page.

View the full qualification details
ZF PRO roof terrace waterproofing project

Existing project

Waterproofing a roof terrace

The ZF PRO portfolio shows real work on an exposed roof terrace. Exact build-up, area, timescale and performance data are not published.

View our projects

Frequently asked questions

Planning waterproofing work

Damp marks, deterioration or persistent water may be warning signs, but the source must be investigated. Inspecting the substrate, upstands and outlets helps clarify the situation.
That depends on its condition, bond, compatibility and configuration. An inspection is needed before deciding whether it can remain, be repaired or should be removed.
They are different system families with distinct build-ups and installation methods. Suitability depends on substrate, geometry, details and intended use.
They connect the main area to other elements. A discontinuity at these points may compromise the whole assembly even when the main surface looks sound.
Defects that are incompatible with the system need treatment. The repair method depends on the assessment and requirements of the selected solution.
Timing varies with area, substrate condition, details, selected system and site conditions. It is estimated after inspection.
Use the Contact page to describe the structure and signs observed. ZF PRO can request further details and arrange a technical visit.

Assessment and quote

Planning a waterproofing project in Tangier?

Tell us about the roof, terrace or affected area. ZF PRO will review the substrate and critical details before proposing a solution and quote.

Request an assessment