A silicone roof coating can be a practical restoration option when an existing commercial roof is still structurally sound and suitable for coating. The decision should come from the roof’s actual condition, including moisture, adhesion, substrate condition, drainage, and compatibility, rather than roof age alone.
Shark Commercial Roofing Systems provides silicone coating and restoration services for commercial roofs. An inspection should determine whether the roof is a good candidate, what repairs or preparation are needed first, and whether another roofing approach would be more appropriate.
About a Silicone Roof Coating
Silicone roof coating is a liquid-applied material that cures into a continuous protective layer over a compatible existing roof. It can add weather and ultraviolet protection while restoring the surface without automatically requiring a complete tear-off.
Many silicone coatings are reflective. Reflectivity can reduce roof-surface heat gain under appropriate conditions, but that does not guarantee a specific reduction in building energy use or cooling costs. Actual energy performance depends on insulation, HVAC systems, air leakage, occupancy, operating schedules, climate, and other building conditions.
Is the Existing Roof a Good Candidate for Silicone Coating?
A coating should be selected only after the roof is evaluated for conditions that affect restoration suitability. The following factors help define whether coating makes sense or whether repair, drainage correction, or broader work should happen first.
| Factor | Conditions Supporting Coating | Conditions Requiring More Work First |
|---|---|---|
| Moisture | The roof assembly is dry enough for the proposed restoration system, with no evidence that concealed moisture makes coating unsuitable. | Wet insulation or trapped moisture is confirmed or suspected beyond the area that can be addressed within the restoration scope. |
| Adhesion | The existing surface can be prepared so the proposed coating will bond properly, with testing or product requirements followed where applicable. | The surface is loose, contaminated, deteriorated, or otherwise unable to provide reliable adhesion without additional corrective work. |
| Substrate condition | The underlying roof components remain serviceable and isolated defects can be repaired before coating. | Rotten decking, widespread deterioration, or other structural or substrate problems require separate repair or replacement. |
| Drainage | Drains, scuppers, and roof slope provide workable drainage for the existing building conditions. | Chronic ponding is caused by blocked outlets, inadequate slope, settlement, or another drainage defect that the coating itself will not correct. |
| Compatibility | The proposed silicone system is compatible with the existing roofing material, previous coatings, primers, and required preparation. | The existing surface or coating history is incompatible, unknown, or requires additional testing and preparation before restoration can be approved. |
A silicone coating does not repair rotten decking, remove saturated insulation, or correct a ponding-water problem caused by a drainage defect. Those conditions should be addressed directly. Depending on what the inspection finds, that may involve localized roof repair, drainage work, removal of affected materials, or a broader roofing scope.
Why Choose Silicone Roof Coating?
When the existing roof is suitable, silicone roof coating can add a seamless protective surface without replacing every roof component. Silicone is commonly selected for its resistance to ultraviolet exposure and moisture, and it can be useful on roofs where the underlying assembly remains serviceable.
Restoration can also reduce the amount of tear-off compared with full replacement on a suitable project. That does not make coating automatically less expensive or better. Preparation, repairs, moisture conditions, drainage, access, and the existing roof system all affect whether restoration is practical.
Future maintenance and recoating also need compatibility review. Once a silicone system is installed, later coating work should be evaluated against the existing silicone surface and the requirements of the proposed restoration system rather than assuming any coating can be applied over it.
The Silicone Coating Process
Preparation and repairs. The roof should be cleaned and prepared according to the selected system, and defects that would interfere with restoration should be addressed first. Seams, flashings, penetrations, damaged areas, drainage conditions, and previous repairs may all affect preparation.
Application. The coating should be applied at the coverage and thickness required for the selected system. Application conditions, cure time, surface preparation, and any primer or reinforcement requirements should follow the written product and project specifications.
Application acceptance. Closeout should confirm that the agreed scope was completed. Depending on the project, this can include reviewing coverage, repaired details, missed or thin areas, adhesion concerns, and any approved changes made during the work.
Follow-up inspection. A coated roof still needs ongoing inspection and maintenance. The appropriate schedule depends on the installed system, roof condition, drainage, rooftop activity, exposure, and any written maintenance requirements that apply.
When Coating Is Not the Right Next Step
Silicone restoration should not be used to hide conditions that require another type of work. Widespread wet insulation, deteriorated decking, large areas of failed roofing, unresolved drainage defects, or incompatible surfaces can make coating inappropriate until those conditions are corrected.
The inspection should explain why coating is or is not recommended and identify the work needed before restoration can proceed. That gives the property owner a clearer basis for comparing coating with repair or replacement without relying on broad lifespan, savings, or performance promises.
Silicone Roof Coating for Commercial Roofs
For a commercial roof that remains a sound restoration candidate, silicone coating may provide a useful way to protect and renew the existing surface. The key is confirming moisture, adhesion, substrate condition, drainage, compatibility, preparation, and repair needs before application begins.
Shark Commercial Roofing Systems can evaluate a commercial roof and discuss whether silicone restoration fits the existing conditions. Property owners can reach out or call (213) 466-0074 to discuss the roof and the next appropriate step.
Frequently Asked Questions
Can any commercial roof be coated with silicone?
No. The roof needs to be evaluated for moisture, substrate condition, adhesion, drainage, compatibility, and repair needs before coating suitability can be confirmed.
Will silicone coating fix ponding water?
No. A coating does not correct a drainage defect. Ponding caused by blocked outlets, slope, settlement, or other drainage conditions should be evaluated separately.
Can another coating be applied over silicone later?
Future coating work requires compatibility review. The existing silicone surface, preparation requirements, and the proposed restoration system should be evaluated before another coating is selected.
Does a silicone-coated roof still need inspections?
Yes. A coated roof still needs inspection and maintenance based on the installed system, current condition, drainage, rooftop activity, exposure, and applicable written requirements.