| Q: |
Are weather conditions a critical factor when installing the product? |
| A: |
Coatings |
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MR-24 ® Metal-Over-Metal System |
- Yes. Coatings should not be applied when temperatures are below 50 o F or above 80 o F and/or
moisture (rain or heavy dew) is likely before curing (24 to 48 hours).
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- No. A metal-over-metal system can be installed under various weather conditions. Installation
is not restricted by temperature and and there is no vulnerable curing time after installation is completed.
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| Q: |
Will my business realize energy savings? |
| A: |
Coatings |
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MR-24 ® Metal-Over-Metal System |
- Limited energy saving. A light-colored coating will provide heat-reflective characteristics
that may reduce hot weather cooking-related costs. However, coatings provide little benefit to heating
costs during cold weather.
- Over time, eposure to UV will diminish the coating's reflective nature as dirt and contaminates
accumulate, reducing cooling-related energy savings.
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- With new insulation expect significant energy savings in both heating and cooling costs.
MR-24 roof systems can incorporate insulation in all applications.
- With a high-profile metal-over-metal system, 6" of blanket insulation (R-19) or more may be applied.
- With a low-profile metal-over-metal system, up to 3" of blanket insulation (R-11) may be applied.
- MR-4 roof panels provide heat-reflective characteristics that can reduce cooling costs.
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| Q: |
Will my roof be safe to walk on after the product has been completely installed? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- Perhaps. Because corrosion can continue--or even accelerate--underneath a coated roof. The
consequences of this presents serious safety issues. An existing light-gauge metal roof that appears
viable from the top may contain areas that are weakened by corrosion. Someone walking on the roof may
fall through, resulting in serious or fatal injury.
- Corrugated translucent panels, never intended for foot traffic, are often coated over and become
undetectable. While this is not a recommended practice, it is a common one that could result in
casualties.
- Future roof foot traffic related to inspections, equipment maintenance, and roof repairs can
damage the coating, causing cracks and surface failure.
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- Yes. The new MR-24 metal roof system is installed over the top of the existing roof panels,
attached to the structural purlins underneath. The condition of the existing deck does not affect the
strength of the panels.
- Translucent panels are covered over with the new metal roof system and pose no danger to foot traffic.
- The new durable metal panels allow foot traffic with little risk to roof performance or weathertightness.
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| Q: |
Can repairs be made without causing interruptions to business operations? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- Yes. However, surface preparation does require existing roof surface be power-washed to remove dirt, debris, loose rust and coating. All through fasteners must be re-tightened or replaced. Failed and weakened panels must be replaced. Corrugated skylight panels should be removed and replaced with steel panels.
- Proper preparation and application steps are critical. A successful application is reliant on the installer's preparation and adherence to strict manufacturer's application instructions.
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- Yes. Repair to the existing metal roof is not required. Moreover, successful installation does not rely on the condition of the existing roof. Removal of the existing roof or disposal of roofing materials is not required. The integrity of the new roof depends only on the existing structure, not the roof panel.
- The new standing seam metal roof system is installed over the existing roof, so installation procedures differ little from any new roof application.
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| Q: |
Are recurring leaks still possible after the product has been installed? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- Yes. Thermal forces from constantly changing temperatures cause a roof to experience
continuous expansion and contraction. This movement is most apparent at fasteners and panel lap
locations where coating cracks will appear as the roof panels expand and contract. As moisture enters
these areas, the moisture is trapped causing coating delamination and roof deck deterioration.
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- No. MR-24 roof systems are specifically engineered to accommodate natural thermal movement.
The system is designed to float on concealed movable clips. MR-24 panel laps are joined by a compression
connection that allows for free expansion and contraction without stress. Reroofing with a MR-24 metal-
over-metal system assures long-term weathertight performance.
|
| Q: |
Are the repair methods comparable in cost? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- In-place costs range from $1.30 to $3.50 per square foot. Prices vary according to the
coating system chosen, the amount of preparation required before coating can be applied, the number
of layers required, and the contractor's adherence to application procedures recommended by the
coating system manufacturer.
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- In-place costs range from $2.75 to $4.50 per square foot. Prices vary according to the
number of penetrations, roof size, insulation type and thickness, and roof complexity.
|
| Q: |
How many years of dependable service can I expect after the product has been installed? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- Life expectancy can be from one to ten years. Extensive maintenance is required to maintain
weathertightness after initial installation.
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- The MR-24 roof system by Butler has decades of proven low-maintenance weathertightness
performance and nearly thirty years of actual in-service life. Independent surveys of 18-23 year
old roof installations have shown that many MR-24 roof systems will last 30-40 years.
|
| Q: |
How much recurring roof maintenance should I plan on after the product has been installed? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
- Periodic maintenance is required. As problems occur, coating must be cleaned from each affected
area and surface prepared, and recoated.
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- Maintenance consists of yearly roof inspection to remove any roof debris, clean gutters, and
check flashings / sealant around roof penetrations.*
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* Based on two year maintenance records from a single customer with approximately
29 million square feet of MR-24 roof in use, maintenance costs of $.003 / sq. ft. were experienced over
the two-year period. |
| Q: |
What assurances will I have that my repaired roof will remain weathertight in the future? |
| A: |
Coatings |
|
MR-24 ® Metal-Over-Metal System |
Available Warranties:
- 2-year seam remedy - provides sufficient material to repair leaks at seams and fasteners.
- 5- and 10-year material remedy - provides sufficient material to repair leaks on roof surface.
- 5- and 10-year material and labor remedy - provides sufficient material and labor to repair leaks on roof surface.
Related Concerns:
- Building movement (deflection or building movement due to vertical or wind loads is an inherent design element of metal buildings). Leaks caused by building movement are often a cause of coating warranty claim rejection.
- Substrate movement (all roofs expand and contract; metal roofs are designed to accommodate roof surface or substrate movement).
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Available Butler Warranties:
- 20-year Extended Life Endorsement - provides that roof panels will remain free from perforation due to corrosion.
- 10- and 20-year Weathertightness Endorsement - provides material and labor protection coverage against roof leakage for panel surface.
- 10- and 20-year Weathertight Gold - provides material and labor protection coverage against roof leakage including panel surface roof penetrations, curbs, trims, and flashings.
All backed by Butler Manufacturing Co., Inc., in business since 1901.
Related Concerns:
- The Metal-Over-Metal system with MR-24 is designed to accommodate thermal expansion and contraction and building deflection caused by the forces of nature.
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