Existing Single-Ply Roofs
Some existing membrane roofs may be candidates for a coating system when the membrane is sound, compatible with the coating and properly prepared. Compatibility and adhesion testing are important.
COMMERCIAL ROOF RESTORATION
Silicone Elastomeric Roof Coatings
A liquid-applied roof restoration option for suitable commercial roofing systems. Explore how silicone coatings can help protect existing roof surfaces when the assembly is properly assessed, prepared and maintained.
RESTORE WHERE SUITABLE
Protecting Existing Roofs Without Automatically Replacing Them
A commercial roof does not always need to be completely replaced when its surface begins to deteriorate. In certain circumstances, a liquid-applied coating system may provide a practical restoration option.
Silicone elastomeric coatings are designed to form a flexible, water-resistant layer over compatible roof surfaces. They are commonly considered for selected metal, single-ply and other commercial roofing assemblies.
The existing roof must be evaluated first. Moisture within the assembly, structural deterioration, drainage problems and incompatible materials can all affect whether a coating is appropriate.
UNDERSTANDING THE SYSTEM
How Does a Silicone Roof Coating Work?
Silicone roof coatings are applied in liquid form over a prepared roof surface. As the material cures, it forms a continuous, flexible coating designed to protect the underlying roof from weather exposure.
The coating is only one part of the system. Surface preparation, compatible primers, reinforced details and correct application thickness are all important to achieving the intended result.
A coating should never be treated as a substitute for repairing a deteriorated roof assembly or correcting unresolved drainage and moisture problems.
Discuss Your Existing Roof →
LIQUID-APPLIED ROOF PROTECTION
POTENTIAL APPLICATIONS
Where Can Silicone Roof Coatings Be Used?
Silicone coatings can be considered for several types of commercial roof assemblies, provided the existing surface is suitable and the selected product is approved for that application.
Metal Roofing
Silicone coatings may be considered for certain metal roofs where corrosion, seams, fasteners and other details have been properly evaluated and addressed before application.
Built-Up and Modified Bitumen Roofs
Selected asphalt-based roof assemblies may be suitable, depending on their condition, surface characteristics and the coating manufacturer's approved system requirements.
Final suitability must be confirmed against the existing roof condition and the specific coating manufacturer's system requirements.
SYSTEM CHARACTERISTICS
Potential Advantages of Silicone Roof Coatings
When correctly selected and installed, silicone coatings can provide several useful characteristics for suitable commercial roofing applications.
Water Resistance
Silicone coatings are designed to form a water-resistant surface. Their suitability depends on correct preparation, application thickness, detailing and the condition of the underlying roof.
UV Resistance
Many silicone coating formulations offer resistance to ultraviolet exposure, helping the coating withstand prolonged sunlight when correctly specified and maintained.
Flexible Application
Coating systems can be applied to certain existing roof assemblies, potentially extending their service life without a complete tear-off when the roof is a suitable candidate.
Reflective Finishes
Available light-colored finishes can reflect solar radiation. Any potential energy benefit depends on the coating, insulation, climate and overall building performance.
PREPARATION MATTERS
A Successful Coating Project Starts Before Application
Applying a coating over an unsuitable or poorly prepared roof can lead to adhesion problems, premature failure and continuing water intrusion.
Preparation and repair work should follow the requirements of the selected coating system and take the existing roof assembly into account.
Arrange an AssessmentKey preparation steps
01Inspect the existing roof and identify the source of water intrusion
02Check the roof assembly for trapped moisture and deterioration
03Clean the surface using the approved preparation method
04Repair damaged membrane areas, seams, penetrations and flashings
05Confirm compatibility and perform adhesion testing where required
06Apply primers or reinforcement materials specified for the system
07Verify weather conditions and substrate requirements before application
08Apply the coating at the manufacturer's specified coverage and thickness
OUR APPROACH
From Roof Assessment to Final Inspection
Every restoration project should begin with an understanding of the existing roof and the requirements of the proposed coating system.
01
Roof Inspection
The existing roof is reviewed for leaks, surface deterioration, ponding water, damaged seams, weak details and other conditions that could affect the proposed coating system.
02
Suitability and Compatibility
The roof assembly is evaluated to determine whether a silicone coating is appropriate. Existing materials, moisture conditions and manufacturer requirements all influence the recommendation.
03
Surface Preparation
The roof is cleaned and prepared using the specified method. Repairs, detail work, primers and reinforcement are completed as required by the selected system.
04
Coating Application
The coating is applied in accordance with the product requirements, including specified coverage rates, wet-film or dry-film thickness and weather limitations.
05
Final Inspection
The completed application is reviewed for coverage, detailing and visible defects. Maintenance guidance and relevant product documentation can then be discussed.
AN IMPORTANT DISTINCTION
When Is Roof Replacement the Better Option?
Roof coatings are not suitable for every building or every roof condition. If the underlying roof assembly has extensive deterioration, significant trapped moisture or structural problems, a coating may not address the underlying issues.
In these circumstances, partial repairs, a retrofit system or a complete roof replacement may be more appropriate. The decision should be based on an assessment of the actual roof rather than the coating product alone.
Explore Other Commercial Systems →ASSESS BEFORE COATING
Conditions that need careful evaluation
- Extensive corrosion or deterioration
- Wet insulation or trapped moisture
- Structural movement or damaged decking
- Persistent drainage and ponding problems
- Loose, blistered or poorly bonded existing materials
- Incompatible surfaces or failed adhesion tests
A professional assessment helps determine whether restoration is appropriate or whether a different roofing solution is needed.
COMMON QUESTIONS
Silicone Roof Coating FAQs
Understanding the product, its limitations and the condition of the existing roof helps property owners make better-informed restoration decisions.
Ask About Your Project →What is a silicone elastomeric roof coating?+
It is a liquid-applied roof coating that cures into a flexible, water-resistant membrane. Silicone formulations are commonly used on selected commercial roof assemblies, particularly where UV exposure and water resistance are important considerations.
Can silicone coating stop an existing roof leak?+
A coating may form part of a roof restoration solution, but simply applying coating over a leak is not a reliable repair. The source of water intrusion must first be identified, and damaged materials, seams, penetrations and flashings must be addressed as required.
Can silicone coatings be applied over any roof?+
No. Suitability depends on the existing roof material, condition, moisture, surface preparation and compatibility with the selected product. Manufacturer approval and, where appropriate, adhesion testing should guide system selection.
Are silicone coatings suitable for roofs with ponding water?+
Some silicone products are designed to tolerate intermittent or prolonged water exposure better than certain other coating types. However, ponding should still be evaluated. Drainage problems, structural concerns and product limitations must be addressed rather than assuming the coating will solve them.
How long does a silicone roof coating last?+
Service life varies with product formulation, application thickness, preparation, roof conditions, weather exposure and maintenance. Any expected service life or warranty should be based on the specific manufacturer's documentation and the installed system.
Does a silicone coating reduce building temperatures?+
Some light-colored silicone coatings have reflective properties that can reduce solar heat absorption at the roof surface. The effect on indoor temperatures and energy consumption depends on the full building assembly, insulation, ventilation, HVAC equipment and local climate.
Does a silicone-coated roof require maintenance?+
Yes. Periodic inspections can help identify damage, debris accumulation, drainage issues and deterioration around roof details. Maintenance requirements depend on the product and roof system.
LET'S DISCUSS YOUR ROOF
Contact Summit RoofingCould Your Existing Roof Be a Candidate for Restoration?
Start with an assessment of the roof's condition, existing materials and restoration requirements before choosing a coating system.
Summit Roofing Solutions is a fictional demonstration business. This page is for illustrative purposes and does not represent a real roofing contractor or completed project.