COST BREAKDOWN: TPO VS ELASTOMERIC
When it comes to protecting a commercial flat roof, two of the most popular solutions are TPO (Thermoplastic Polyolefin roofing systems) and silicone roof coatings. Both options provide long-term performance, but they are very different in terms of cost, installation process, durability, maintenance, and ROI. Think of silicone coating like a protective shield as strong as your current membrane. Easy, extra protection.
For building owners looking to save money while maximizing roof lifespan, silicone coatings often become the smarter investment. Let’s break down the real cost differences and why silicone may be the better solution.
In short, ELASTOMERIC coatings cost 50%-70% less than a new TPO roof.
Because TPO requires tearing off old material, insulation replacement, new membrane installation, and new seams, labor and disposal drive costs much higher. Elastomeric Silicone, on the other hand, is installed directly over your existing roof system, eliminating demolition and waste fees.
On average, a new TPO roof for a standard 1,000 SqFt roof can cost $15,000 or more depending on the details and materials. An elastomeric coating can cost around just $5,000.
TYPICAL TPO ROOF ESTIMATE
Remove existing roofing system
Disposal of roofing system
New TPO membrane and detail; price and quality varies wildly by manufacturer
Inspect complete roof decking. Replace any rotten or bad plywood for an additional charge of $150 per sheet
Install a 1/4’ densdeck sheet
Install a taper system mechanically fastened
Install a 60mil TPO mechanically fastened
Install new clad metal drip edge
Install new pipe flashings
Install new wall flashings
Use termination bar and counter flashing to terminate wall flashing
Use caulking to final seam termination bar and pipe flashings
cost: $15,000
Elastomeric coating is applied over your existing membrane, meaning:
No demolition
No debris hauling
No interruption your everyday life
LOWER MAINTENANCE COSTS
Unlike TPO, which has heat-welded seams that can fail over time, silicone creates a fully seamless waterproof membrane, drastically reducing future leak points.
LESS REPAIR frequency
TPO roofs commonly leak at:
Seams
Flashing
Penetrations
Shrinkage points
Silicone eliminates seams entirely and stays flexible, reducing the likelihood of crack or separation leaks.
Unlike TPO or similar membranes that weaken over time, silicone is permanently waterproof and performs better in ponding water conditions.
MOLD & MILDEW RESISTANT
ELASTOMERIC ESTIMATE
Elastomeric coating
Elastomeric MASTIC coating (for seams and problem areas)
Fabric
Application of coating
PRE AND POST APPLICATION INSPECTION INCLUDED
cost: $5,000
That’s just the short-term cost; let’s look at the long-term cost.
No tear-off costs
PERFORMANCE AND DURABILITY BENEFITS OF ELASTOMERIC COATING
100% waterproof
Perfect for humid or storm-prone regions (Hello, NJ summer) — silicone roofs do not absorb moisture, preventing issues like mold growth and water saturation
UV & HEAT RESISTANT
Silicone coatings:
Reflect harmful UV rays
Reduce roof surface temperature
Lower energy costs
Slow roof degradation
FLEXIBILITY IN EXTREME WEATHER
Silicone stays flexible in both extreme heat and cold, meaning fewer cracks, fewer splits, and better performance year-round.
BOTTOM LINE
If your roof is in decent condition but aging, leaking, or collecting water, silicone roof coating offers superior waterproofing, lower installation cost, reduced maintenance, energy savings, and long-term value compared to TPO replacement.
Many business and home owners who choose silicone save tens of thousands over the roof’s lifetime while gaining better leak protection and environmental durability. A professional roof evaluation will determine if a silicone coating is right for you.