1. How often should I coat my rubber roof?
Many building owners are under the impression that they have a rubber roof that needs to be coated periodically. There are some roofing contractors that sell Modified Bitumen membranes as rubber, THEY ARE NOT. True rubber membranes (ie: EPDM, TPO, PVC) do not need to be coated. Sometimes a building has a Modified Bitumen membrane which a) is not rubber and b) may need periodic coating. A Modified Bitumen membrane is an asphalt based membrane which can be applied by heating the underside of the roll with a torch, set in hot asphalt, or applied with a cold mastic. These membranes may be either smooth surfaced or have a granular surface. The ones with a smooth surface are the type that need periodic coating.
2. What is the difference between a Guarantee and a Warranty?
A guarantee is given by the contractor who installs the roof. This guarantee can be limited and is only as valid as the contractors word and is good for as long as the contractor remains in business. A warranty is issued by the manufacturer of the roof system. Warranties come in many forms – material only, limited material warranty (which is usually a pro-rated warranty), labor and material, and NDL (no dollar limit) are some of the types. The most common, a labor and material warranty, covers the costs to repair the roof from any leaks caused by a failure of workmanship AND/OR materials for the stated period and is backed by the Manufacturer. This means that even if the contractor goes out of business the manufacturer will pay another contractor to make the repairs.
3. Should I get a white roof?
Not necessarily. This area of the country is in a gray zone when it comes to deciding on a white vs black roof. While a white roof will reduce your cooling costs most building owners in this part of the country pay more per year for heat than they do for cooling. Studies have shown that regardless of which color you get the most effective way to increase your savings is with thicker insulation. Ridge Roofing can provide you with aTrue Roof Cost Life Cycle Savings Report which will show your energy savings and carbon reduction based on increased insulation values.
4. Can you install my new roof over top of my old roof?
Once it is determined a roof system has no remaining service life, the decision to re-cover or replace it must be made. There are a number of factors or conditions, called replacement triggers, that preclude the use of a re-cover roof system and dictate the tear-off and replacement of an existing roof system such as – Building Code Requirements, Roof Surface Condition, Wet Insulation, Perimeter Conditions, and Roof Deck Condition.
There are two types of replacement triggers, those that are absolute and those that are subjective.
The absolute replacement trigger topics are:
• building code requirements
• phenolic insulation over steel deck
• composite roof decks
• direct-to-deck polystyrene
The replacement trigger topics that are subjective are:
• roof surface condition (does it hold water)
• existing perimeter conditions
• wet insulation
• roof deck deterioration
• the necessity to install a vapor retarder
• non-reinforced PVC membranes
5. How do I know if my membrane roof was properly installed.
Visual examination at the time of application is the most effective means of evaluating the installation of single ply membrane roof. Visual examination may include routine measurements where applicable. Common sense must be used in the evaluation of the application, and reasonable variances from specified amounts are to be expected. Significant deviations from any particular criterion should be corrected as soon as possible.
A few items to note are:
– The minimum number of fasteners is applied and spaced as specified; reasonable variances from
spacing distances are to be expected.
– Fasteners are properly driven.
– End laps and side laps meet minimum required dimensions.
– Where possible, all sheets are installed so side laps and end laps are not bucking water.
– When roofing over existing roof systems, the surface should be dry and free of ponded water, ice
or snow prior to, during, and after the roofing installation.
– Perimeter wall flashing and flashing around vents, roof drains, skylights, and miscellaneous roof
projections are properly sealed as per construction documents and specifications.