Frequently Asked Questions


Do you have a roofing question? If the answer to your question isn't shown below, use the Comments Tool and send us your question. We'll respond to your question and review it for possible inclusion in this post. 

Is Genco Roofing Licensed?

Genco Roofing is a licensed & bonded Arizona contractor. We also carry full insurance coverage for workman's compensation & general liability. Genco Roofing has a clean record with no complaints to the Arizona Registrar Of Contractors. We have an A+ rating with the Arizona Better Business Bureau.

What is the best kind of roof system?

Wouldn't it be great if there was one answer to all our roofing troubles? Unfortunately there is no magic bean in the roofing industry that solves all roofing problems. What the roofing industry does offer is a wide variety of good products from a lot of different roofing system manufacturers, each having attributes and faults. The key to selecting a proper roofing system is identifying the specific roof design needs of your building, and how each roofing system meets those needs. A simple example would be: If a building has very heavy foot and wheel traffic on the roof, a 45 mil single ply membrane probably would not be advisable, due to its limited puncture resistance.

Why does my roof leak?

Well a cynic might answer that there are two kinds of roofs, those that leak and those that will leak. Roofs leak from a break in the waterproofing layer, sometimes caused by mechanical damage (ie, someone dropping an HVAC access panel on the roof), sometimes from an opening in the sealant, such as pitch pans and caulking, high winds and hail damage and sometimes from deterioration or defects in the roofing material. The key to roof management is leak avoidance. Find and correct defects before they leak because once it does the damage will only spread compromising the whole roof sub roof integrity (wood rot and mold).

How long should a roof last?

Like any building component, roofs degrade at different rates depending on a large number of factors: the quality of original construction, the level of abuse, the level of maintenance, appropriateness of design, etc. So how long should a roof last? We have seen poorly designed and installed roofs go as few as six or seven years before they failed, and we have seen old coal tar built up roofs that were over 40 years old. Most building owners, roofing contractors and designers feel 15 years is an acceptable service life.

Can I cover over my existing roof?

Installing a roof over the top of an existing roof is generally acceptable under these guidelines: A building cannot have more than two roof layers No wet insulation can be left in place The roof structure must be able to handle the additional roof load The new roof must be attached to the roof deck to meet wind loads (it is not generally acceptable to adhere the new roof to the old roof).

How many roofs can I put on?

Most building codes allow a structure to have two roof membranes in place, but not a third. If you currently have 2 roof layers and need a new roof the current codes require removal of all existing roof layers before installing a new one.

How often should my roof be inspected and by whom?

We recommend a thorough inspection every year by a roofing professional. Roofs that are heavily trafficked may require more frequent inspections. Roofs with many penetrations and lots of roof traffic are going to require more frequent maintenance than roofs with no penetrations and low levels of traffic. There are a number of "musts" on every roof however, including keeping drainage devices open and clear of debris, removing foreign objects, and conducting regular inspections. Some roofs require more maintenance than others, and each should have a maintenance/inspection schedule.

Which roofing manufacturer should I use?

There are a lot of things to consider when choosing a roofing manufacturer. Do they offer the roof membrane/system that best fits your needs? Is their product quality the best of that generic type? What is their commitment to after-the-sale service? Some of the best products and service come from mid-size or smaller companies. Genco Roofing is an approved applicator of all major manufacturer's of roofing products. 

1 Comment

    August 18, 2014

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