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Home » Articles » GAF TopCoat » Repairing a Flat Roof with GAF TopCoat

Repairing a Flat Roof with GAF TopCoat

May 25, 2015 by admin Leave a Comment

This homeowner had a sun room company build this sun room onto the back of his house. With time, however, it began to leak. The roof was flat sheets of metal (with a sort of “orange peel” texture, and paint baked on) joined with seams. Caldwell’s Roofing advised repairing a flat roof with GAF TopCoat product to fix the problem.

After Pressure-Washing the Roof, Caulk Was Re-Applied to Loose Areas

Afer Pressure-Washing the Roof, Caulk Was Re-Applied to Loose Areas

TopCoat is an elastomeric roof coating product. First, the suspect seams, screw heads, etc., are hit with a coat of the Flashing Grade and mesh is rolled and embedded into the coating. GAF’s TopCoat product has two products – the “Flashing Grade” is a 5-gallon container with a red top, and the “Membrane” is a 5-gallon container with a blue top. Both products themselves are white, and both are called “TopCoat.” The “Flashing Grade” is a sort of “primer” product, that helps the “Membrane” to better adhere.

Repair Areas Were Prepped Further by Etching With a Strong Degreaser

Repair Areas Were Prepped Further by Etching With a Strong Degreaser

Before applying either product, degreaser is used to “etch” the metal a bit to provide for a stronger adherence of the Flashing Grade TopCoat.

This Shows the Roof After Mesh and a Coat of GAF Flashing Grade TopCoat Has Been Applied to Any Suspect Areas on the Roof

This Shows the Roof After Mesh and a Coat of GAF Flashing Grade TopCoat Has Been Applied to Any Suspect Areas on the Roof

The picture above shows the roof after having finished the first step, which is applying Flashing Grade TopCoat and mesh to the suspect areas.

Showing the Roof After First Whole-Roof Application of GAF Flashing Grade TopCoat

Showing the Roof After First Whole-Roof Application of GAF Flashing Grade TopCoat

Next, after allowing the product to cure for a day, the Flashing Grade Top Coat is applied over the whole surface of the roof, as seen above.

Repairing a Flat Roof with GAF TopCoat - Showing Finished Roof After Two Coats of GAF Membrane TopCoat

Repairing a Flat Roof with GAF TopCoat – Showing Finished Roof After Two Coats of GAF Membrane TopCoat

After that has cured for a day, a layer of Membrane TopCoat is applied over the roof. Then, waiting yet another day for that to cure, a final second coat of Membrane TopCoat is applied. In the picture above, all steps have been completed. This roof repair ran $1,855, came with a 5-year proper-installation warranty, and should be a fairly long-term way to address this prematurely failing roof.

 

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Filed Under: GAF TopCoat, Low-Slope Tagged With: elastomeric roof coatings, flat roof repairs, GAF TopCoat

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Caldwell’s Roofing

Brad Caldwell

334.332.7799

caldwbr@gmail.com

1780 Hyden Park Ln;

Auburn, AL 36830

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GAF Certified Weather Stopper Roofing Contractor

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GAF Certified Green Roofer

GAF Steep Slope Pro Field GuideNRCA Member

IB PVC Roof Installer

SRCA Slate Roofing Contractors Association Member

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Caldwell’s Roofing Service Areas

  • Alex City, AL
  • Auburn, AL
  • Columbus, GA
  • Dadeville, AL
  • Montgomery, AL
  • Opelika, AL
  • Phenix City, AL
  • Salem, AL
  • Smiths, AL
  • Tuskegee, AL

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  • Huntsville, AL

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