Anyone else annoyed by how fast roof coatings peel off?

- Totally get where you’re coming from. I’ve been down the coating rabbit hole myself, and yeah, it’s frustrating how fast they can peel on older roofs.
- For me, the prep is a killer - spend hours cleaning and patching, but if your decking’s got flex or there’s hidden rot, the coating is just a band-aid.
- I’ve tried both elastomeric and silicone coatings. On my 18-year-old low-slope roof (asphalt roll), neither lasted more than two seasons before bubbling up or flaking off in spots.
- Rolled roofing patches aren’t pretty but honestly, they outlasted the fancy coatings for me. Especially over spots that see ponding after a storm.
- Sometimes I think the marketing sets expectations way too high. “Lifetime” this and “permanent” that… Nah. If your roof’s pushing 20 years, patching and saving for a real replacement just makes more sense.
- For folks with newer roofs or better decks, maybe coatings buy you time. But for older stuff? You’re not alone in feeling let down by all those miracle claims. Sometimes good enough really is all you get... at least without dropping thousands on a new roof.

Sometimes I think the marketing sets expectations way too high. “Lifetime” this and “permanent” that… Nah.

I hear you on the hype, but I’ve actually seen silicone coatings hold up well - if (big if) the prep is spot-on and the roof’s structure isn’t too far gone. Not a miracle fix, but on a 10-year-old torchdown I inspected last spring, the coating looked solid after three years. Maybe it’s also about climate? Hot/dry here, so less freeze-thaw. Just saying, sometimes coatings do buy a little more time than patches - depends on what you’re working with.

Just saying, sometimes coatings do buy a little more time than patches - depends on what you’re working with.

I get where you’re coming from, but I’ve had the opposite luck with coatings on some of my older flat roofs. Even with good prep, a couple spots started bubbling and peeling after two winters (Midwest, lots of freeze-thaw). Maybe it’s just our weather, but I’ve found that once the underlying roof is past a certain point, coatings are just a band-aid. I’d rather budget for a full replacement than keep re-coating every few years.

That’s a fair point about coatings being more of a temporary fix, especially in climates with harsh freeze-thaw cycles. I’ve seen similar issues - once the substrate is compromised, even the best prep and high-end coatings can start to fail pretty quickly. Sometimes you’ll get bubbling or delamination where moisture was trapped underneath, and it just gets worse after a couple seasons.

Out of curiosity, what kind of roof deck are you dealing with? I’ve noticed that older wood decks tend to hold onto moisture more than newer systems, which seems to make coatings less effective over time. Also, did you use an elastomeric or silicone-based product? Some of those claim better flexibility for freeze-thaw, but in practice, I haven’t seen a huge difference once the underlying material is shot.

I’m always interested in hearing how folks handle maintenance on aging flat roofs. At what point do you decide it’s not worth patching or coating anymore?

I’ve got an old tar-and-gravel flat roof over a wood deck, and honestly, I’ve been through the same cycle - patch, coat, hope for the best. I tried a silicone coating last time because of all the freeze-thaw we get here in upstate NY. Looked great at first, but by year three, it was bubbling where the wood had soaked up moisture. At this point, if I see more than a couple new leaks in a season or the deck feels soft underfoot, I start budgeting for a full tear-off. Coatings just don’t cut it forever when the base is tired.