Frequently Asked Questions

  • Roofing work has been classified by the State of Ohio as an “Essential Business” because leakage into homes or businesses create risks to health and safety. We are following State recommendations by requiring workers with cold or flu-like symptoms to stay home, and are providing our workers with the rules and supplies necessary for full compliance.

    In consideration of health and safety risks never imagined, we have adapted many of the “standard operating procedures” that we have developed and used over the last four generations:

    • Our estimators will be providing detailed written proposals to reduce the need for “in-home” presentation of our recommendations.
    • To avoid entering your home or business, our repair personnel and estimators may ask that you “text” photos of interior damage caused by leakage. This information guides us to the most likely roofing, masonry, siding, or gutter leakage sources. The best repairs and replacements start with a thorough understanding of past issues, knowledge of your concerns, and careful inspection work.
    • In addition to photos, exact interior locations where moisture entry was first noted helps direct our search for the source. If you can provide us with a very simple drawing, from an overhead perspective, displaying an “X” where moisture was noted, this drawing further reduces our need to enter a home or building. Dimensions should be added to indicate how far the “X” is located from exterior walls. Sometimes a plumbing pipe or chimney may be added to a drawing to help identify a location. The same type of labeling may also be marked onto a Google Earth screenshot. This information may be emailed to or texted directly to our personnel that contact you. Some homes and buildings are simply too complex for this approach, and we will continue offering to collect necessary interior information while following CDC recommended procedures.
    • When we are permitted to enter homes or businesses, we will be following “social distancing” guidelines, and will be wearing disposable boot covers and gloves. Only workers free of even minor cold or flu symptoms are permitted to work.

    Our service and workmanship goals remain unchanged, but our methods for achieving those goals have been updated to address the unprecedented COVID-19 threat. We are all different, and so are our homes and offices. If you have special concerns or creative ideas for safe and efficient approaches at your home or business, please let us know and we will gladly personalize our procedures to your situation.

  • The best roofs are hand nailed!

    Nail guns are popular because they shorten training time and reduce effort. It takes years of practice to become proficient at hand nailing, but nail gun productivity can be achieved almost immediately. In spite of this apparent advantage, we prefer to hand nail shingle roofing.

    Ideal nail placement is limited to a very small area. When a nail is driven outside of that area, the shingle’s wind resistance is reduced and the manufacturer’s warranty may be invalidated. Proper nail placement is certainly possible when using a nail gun, but placement tends to be considerably more accurate when hand nailing.

    On pre-1960’s homes, roof sheathing boards are typically 5-1/2″ wide. When installing shingles over these relatively narrow boards, many nails will unintentionally be driven between the boards. If not pulled out and re-located, these nails will back-out over time. When hand driving a nail between the boards, you can feel that the nail missed (and you can use the claws of your hammer to pull the nail out). This feel is not present when using a nail gun, and nails driven between boards are more likely to be overlooked, which will cause raised shingles or leakage.

    In addition to being properly located, nails must be driven flush with the surface of the shingle. This means that the nail cannot be over-driven or under-driven. This requirement is complicated by temperature, variations in wood type, and by the types of roofing and flashings that are being secured. Nail gun air pressure must be adjusted frequently to compensate for these variations, often requiring a trip to the compressor for each adjustment. It has been our experience that air pressure is most often set too high, saving the installer from the need to use a hammer to “finish” raised nails. Unfortunately, over-driven pneumatic nails tend to blast completely through the shingle, creating a problem that remains unseen until high winds test the installation. In cold weather, when shingles are less flexible, this problem may occur even when nail gun air pressure is properly set. Hand nailing provides a clear advantage in this regard.

    The photo on the left shows an incorrectly positioned and badly over-driven nail. This shingle may be easily lifted by wind, and would not meet manufacturer warranty requirements. The photo on the right shows two nails that were driven on an angle, and are not flush. In time, these nails will wear holes in the shingle tab that will lay over them.

    There may be situations where nail guns are appropriate, but we believe that better quality shingle roof installations are achieved by hand nailing.

  • ice-dam“Ice dams” are accumulations of ice that prevent normal drainage from a roof, potentially causing heavy interior leakage. These types of leaks are made possible by heavy snowfall, followed by outdoor temperatures that remain below freezing for extended periods of time. Heat loss from the building interior causes the snow to melt, but the melted snow re-freezes at the colder overhangs and gutters. This cycle of melting and re-freezing continues as long as temperatures remain below freezing, causing “ice dams” to grow. Eventually, the “dam” causes drainage to back-up beneath the roof, and enter the structure.

    Current weather conditions (2/13/2021) in the Cincinnati area are ideal for “ice dam” formation. Ice dams were most recently an issue in 2010 and 2014.

    Leakage occurring during the conditions described, may be identified as resulting from ice dams if the leakage does not reoccur during normal rainfall. Once identified, ice dam leakage may be addressed in a number of ways:

    • Do nothing. If leakage was minor, and has never occurred in the past, it may be reasonable to decide that the expense involved with possible remedies is unnecessary. Icicles hanging from gutters or downspouts are not generally and indication that repair work is needed. We may be of assistance in determining whether work is needed if you send a photograph of the ice formation to
    • Improve attic ventilation or attic insulation. For the ice dam to form, snow on the roof must first melt, in spite of the fact that outdoor temperatures are below freezing. Both attic ventilation and attic insulation serve to reduce possibility of rooftop snow melting prematurely.
    • Install Ice and Water Shield beneath shingle, slate, or tile roofing. This material creates a barrier to ice dam leakage, and is most economically installed during the course of roofing replacement.
    • Install heating cables. There are some ice dam situations that cannot be resolved by anything other than heating cables. Electrical outlets must often be added to serve the new cables. It is often necessary for someone to remember to activate the cables when weather conditions warrant.

    Molloy Roofing has worked in the Greater Cincinnati area for well over a century, and in recent decades we have noted an increase in the frequency of ice dam conditions occurring.

  • The decision to recover or tear-off existing low slope roofing will influence the costperformance, and insulating value of new roof installations.

    “Recovering” the existing roof significantly reduces the cost of roofing replacement and preserves existing insulation value. This approach often provides the best value, but can prove to be a costly mistake if certain conditions are overlooked.

    Building codes have long prohibited the installation of more than two layers of roofing. This limitation reduces the likelihood of overloading and of moisture entrapment. While the consequences of overloading may be obvious, moisture entrapment can be equally destructive since trapped moisture will accelerate the deterioration of new roofing, insulation, and even the supporting deck. Core samples provide the information for evaluating existing roofing.

    Other factors can influence this critical specification, but trapped moisture is often the most important consideration when assessing the need to remove an existing roof.

  • The ice and snow are no longer on my roof, and it is no longer leaking; is there anything that should now be done to my roof or gutters?

    Maybe! Some possible scenarios are listed on this page.