Fixing Our Old House

Fixing metal roof
Fix wood rot
Painting siding
Fixing metal roof
Fixing wood damage
Installing gutters

Click to enlarge

Metal roof at the start

A. Roof had rusted through

Metal roof being scraped

B. Roof was scraped

Metal roof being covered with reinforcing cloth
C. Fabric reinforcement applied
Metal roof finished
D. Where metal had rusted away, created an overhang using impregnated cloth

Patching our Metal Porch Roof

Unlike the main roof that just needed scraping and painting, parts of the porch's metal roof had rusted through, Photo A. A new roof would have cost two to three times as much as repairing the current roof using Preservation Product's Reinforced Restoration System (see below).

The first step was to scrape the roof to remove any loose paint, roof cement [Roof cement should never be used on a terne metal roof], and loose rust, Photo B. A metal putty knife was used.

After the scraping, the roof was power washed and a strong solution of TSP brushed on. This TSP solution was then removed using a power washer. A chlorine solution was then washed on to remove any remaining moss. A hose with a nozzle probably would have worked as well as the power washer since the scraping and TSP solution took off all of the loose material. Power washing was limited to where there were no holes in the metal.

The Preservation Product's restoration system required the following steps:

  • (1) A rust inhibitive primer coating was painted on using both a brush and roller.
  • (2) Small sections of each roof panel were coated with an acrylic coating and a high strength stitch-bonded reinforcement fabric was embedded into this wet coating, Photo C. The fabric panels were cut to fit each section although the fabric come's in two sizes: One to go in between the roof panels and another size to go over the metal seams. If it is hot, large pieces of the fabric cannot be applied in the sun as the coating that the fabric is embedded into dries too quickly.
  • Two coats of a high strength waterborne elastomeric finish coating were applied.

In some places, the two inch metal overhang had rusted away. In these cases, pieces of fabric were dipped into the coating liquid and then draped over the edge to fill in the missing metal, Photo D.

Product Information

Preservation Productsleave site

Information on tin roof repair from a roofing firmleave site




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