If the existing plywood is rotten or damaged it may need to be replaced. Also, if your home was built prior to 1960 it may have been sheeted with 1” boards. Often when roofs were sheeted in this fashion the builders left gap spacing between the boards to maximize building material usage. The “gap sheeting” should always be sheeted over with CDX plywood or OSB in a re-roofing project if the gaps are >1/2”.

We try to anticipate anything that may arise during the roof project and include it in our bid. The two biggest additional costs are: 1) Additonal layers of tear off. Usually we can lift up the old roofing and count the layers of roofing that are present and include that accordingly in our estimate. Occasionally there can be an additional layer that was unforeseen. If this is the case we will document the additional layer with photos and, if it is an insurance claim, we will submit the extra cost to the insurance company as a “supplement”. This means that the insurance company will pay for it, not you. 2) Re-sheathing the roof. At the time that a salesperson inspects the roof to draw up an estimate, the roof sheathing can typically be inspected from the underside by peaking into the attic space and looking at the bottom side of the roof. In old houses built prior to the 1960s “skip sheathing” or “gap sheathing” may be present. This means that the roof was sheathed with 1” x 8” or 10” boards and the builders usually left a gap between the boards. If the gaps are greater than ½”, re-sheathing with plywood or OSB will most likely be necessary to insure that a row of nails (shingle roofs) or screws (metal roofs) holding the new roofing on will not fall in the gap and render those fasteners useless making the new roofing material more vulnerable to damage from wind.

Ask if you can get a copy of their work comp and general liability insurance certificates with you (the building owner) listed as “additionally insured”.  This will protect you and your property during construction.  If this cannot be provided by the contractor then he is not a legitimate contractor and should never be considered for the project regardless of how low his price might be.  This is usually a sign of a sketchy contractor who cannot be trusted.

It depends on what your needs are? Metal roofs are more labor intensive and expensive but in some cases may have higher wind resistance and longer, maintenance free life expectancy than certain shingle products. On the other hand, there are many options for both shingles and metal roofing products. You should contact Ace Roofing to discuss the specific needs of your roofing project.

If you aren’t certain that you can trust a roofing company that is attempting to sell you a roof, then yes, you should “interview” two, three, or more companies until you find one that is fair and trustworthy. Insurance companies often coach property owners to get three estimates to make sure the owner isn’t taken advantage of by the first salesperson that knocks on the door. However, if you know a roofing company to be trustworthy there is nothing wrong with giving them the responsibility of doing the work.