Roof Coating Application Guide

Applying a liquid waterproof coating to a flat roof with upstand detail can be a manageable task with the right preparation and technique. Here's a step-by-step guide to help you through the process.

Note all coatings vary, always follow an up to date manufacturers date sheets:

1. Gather Materials and Equipment:

   • Liquid waterproof coating
   • Primer (if recommended by the manufacturer)
   • Roller or brush suitable for the coating
   • Paint tray or bucket
   • Cleaning solution and scrub brush
   • Safety equipment: gloves, goggles, and protective clothing
   • Ladder or scaffolding (if needed)

2. Prepare the Surface:

   • Clear the roof of any debris, dirt, or loose material. Sweep the surface thoroughly.
   • Use a cleaning solution to remove any stubborn dirt or stains. Scrub the surface with a brush and rinse with water.
   • Allow the surface to dry completely before proceeding. Make sure there is no standing water.

3. Inspect and Repair:

   • Check the roof for any signs of damage such as cracks, holes, or deteriorated areas.
   • Repair any defects using appropriate materials such as roof patching compound or sealant. Allow the repairs to cure completely before proceeding.

4. Apply Primer and Joint Tape (Where Required):

   • All joints should be taped with the recommended tape. Some liquid waterproof coatings may require a primer to improve adhesion and performance. Follow the manufacturer's instructions for applying the primer and allow it to dry completely.

5. Mix the Coating:

   • Stir the liquid waterproof coating thoroughly using a stir stick or drill with a mixing paddle. Ensure the coating is well mixed to achieve consistent results.

6. Start Applying the Coating:

   • Begin by applying the coating along the upstand detail, using a brush or roller to ensure even coverage.
   • Work in small sections, starting from one end and gradually moving towards the other.
   • Apply the coating evenly, making sure to avoid puddles or thick buildup, which can lead to uneven waterproofing.

7. Work on the Flat Surface:

   • Once the upstand detail is coated, move on to the flat surface of the roof.
   • Pour the coating onto the surface and spread it evenly using a roller or brush.
   • Work methodically, covering the entire surface with a consistent layer of the coating.

8. Apply Additional Coats (If Necessary):

   • Depending on the type of coating and the manufacturer's recommendations, you may need to apply multiple coats for optimal waterproofing or an additional top coat.
   • Allow each coat to dry completely before applying the next one. Follow the specified drying times provided by the manufacturer.

9. Inspect and Touch-Up:

   • Once the final coat has dried, inspect the entire surface for any missed areas or imperfections.
   • Touch up any areas as needed to ensure complete coverage and a seamless finish.

10. Cleanup and Maintenance:

    • Clean tools and equipment with water or appropriate cleaning solvents as per the manufacturer's instructions.
    • Dispose of any leftover coating and packaging properly.
    • Regularly inspect the roof for any signs of damage or wear and perform maintenance as needed to ensure long-term waterproofing effectiveness.

By following these steps carefully, you can effectively apply a liquid waterproof coating to your flat roof with upstand detail, providing durable protection against moisture and extending the lifespan of your roof. Always refer to the specific instructions and manufacturers up to date data sheets for applying liquid catings.