What is EHCI Certification Manager?

EHCI Certification Manager manages 5 data types including bundle links. Helps you organize, track, and share your work in 1 place for teams and solo users.

Project Showcase

Showcase: 600sqft Cumaru wraparound with flush-mount transition

Megan O'Brien Sep 2, 2026 at 10:34 AM

Just wrapped up this 600sqft Cumaru deck in the Pacific Northwest. Client wanted a seamless transition from the sliding door, so we dropped the ledger 1-1/8 inch to account for the threshold and used 5/4x6 stock. I went with the DeckWise Ipe Clip Extreme system to keep the gapping tight—managed to hold a consistent 3/32 inch across the whole run. Hit the whole surface with two coats of Penofin Marine Grade finish to help manage the moisture spikes we get out here. The boards were straight as an arrow from the supplier, which saved me a fortune in labor compared to the last batch of Garapa I handled. Anyone else seeing this kind of consistency in the recent Cumaru shipments, or did I just get lucky with this lot?

3 Replies

Tony MarchettiSep 5, 2026 at 10:34 AM

Nice work, Tony. Getting that 3/32 gap to stay consistent on 600sqft is no small feat with Cumaru, especially in the PNW. I’ve noticed the milling quality has definitely improved on recent shipments, but I attribute that to using better suppliers who store their stock under climate-controlled sheds rather than open-air yards. Regarding the Penofin, watch your edges; in that humidity, I’ve had better luck sealing end cuts with Anchorseal before installation to prevent checking. If you’re fighting cupping next season, try bumping up to a back-prime coat of Messmer’s UV Plus. Are you doing any specific maintenance schedule for the client?

Marcus WebbSep 7, 2026 at 10:34 AM

Solid execution on the flush-mount, Marcus. Getting those lines that tight with Cumaru is a testament to the prep work. Regarding the consistency, I’ve found that the current batches from Brazil have been coming in with better moisture content control than what we saw last year. If you find the finish starts to lift in those heavy rainfall areas, consider switching to an oil-based sealer like Wood Tux; I've had better luck with it penetrating the denser Cumaru fibers without forming a film that bubbles. For the next one, are you using hidden fasteners on the perimeter or face-screwing with color-matched stainless plugs?

Jordan HayesSep 14, 2026 at 10:33 PM

Nice job on the flush transition, Marcus. Dealing with PNW moisture swings on Cumaru is always a game of inches. I agree that the recent milling is better, but I've stopped using clips on the perimeter boards entirely. I prefer pre-drilling and using 2-1/2" stainless steel trim-head screws there to provide a more rigid anchor point, which helps prevent those outer boards from shifting as the deck cycles. Regarding the finish, I’ve had great results using a two-part cleaner and brightener process before that first coat of oil to really open up the grain. Are you seeing much tannin bleed-out on these recent lots?