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Here, we have a home with multiple layers of shingles applied on top of one another over the years. The roof appears to be five layers deep. There is a porch on the back of the house with extensive rotting wood caused by an improperly designed roof structure and improper membrane installation. The gutters on the home appear to be old and have issues with slope, leaking end caps, and mitered corners.


Incorrect Installation of Membrane that caused Water Damage on a flat surface in Knoxville TN

Back porch stoop with incorrect membrane and extensive water damage, multiple layers of shingles and old gutters

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    Multiple layers of shingles four or five layers

    Multiple layers of shingles have been added to the roof deck not only causing potential roof leaks and roof issues, but also adding an enormous amount of weight to the roof structure

    In this photo, you can see that several roofs have been installed on top of the other. This is generally not a good practice for longevity and is prone to leaking. Nails are likely not to reach the wooden decking below; even if they do, I am likely to be driven into some soft areas of wood. Exposing the entire roof deck is always the best plan.

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    Flat roof issues

    In this photo you can see that there have been some attempts to divert water from the main problem area on the flat roof adjoining to an old shingle roof. The gutter leaks and the membrane leaks and has caused severe water damage to the porch structure underneath

    Improper flat roof membrane installation and improper framing and design lead to substantial water damage and rotten wood

    In the photo above, you can see that a flat roof was installed over the porch stoop in the rear of the house. It appears that it was not tied incorrectly to the existing shingles, nor was it tied incorrectly to the house under the eaves. This area appears to have been having problems for a long time as the structure underneath is compromised with rot. 

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    Rotten boards, sagging roof

    In this photo, you can see that the roof is sagging. This is because the decking underneath the shingles has been exposed to water damage and has softened and rotted the decking underneath. Some boards will need to be replaced

    Here, you can see that the decking boards beneath the shingle layers have given way to rot. Sagging is evident, and the area is very soft and spongy. Some boards will need to be replaced as the roofing process starts.

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Bad gutters and improper installation of roofing components

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    Old style spiked gutters damaged and pulling away from the facia

    These old style gutters with spikes showed signs of age and where. They leak from the joints and miters and appear to have had some impacts and are discolored

    Here, you can see that the gutters or damaged and aged. These are old-style gutter hung with spikes instead of hidden hangers and the gutter has begun to pull loose from the facia and fall away from the house. These gutters are recommended for replacement. 

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    No ridge vent and incorrect ridge cap material

    Cut up architectural shingles were used instead of ridge cap shingles on this house. There also is no ridge vent to let hot air is scape from the ridge

    No ridge vent and incorrect ridge cap material were discovered during the inspection. Ridge vent allows superheated air to escape from the attic while soffit vents allow cool air to be pulled in from underneath. The ridge on this house has been kept with cut-up architectural shingles.


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  3. 3
    Improper chimney flashing

    This chimney has not been properly flashed. The installer has used shingles and turned them up under the side of the chimney and used tower to seal. This is an unacceptable method of installation of chimney flashing

    In this photo, you can see that the installer turned the shingles up the chimney and caulked them to the surface. This is not an acceptable method of flashing a chimney and likely to have many problems.

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