Robert Chen here. In a hypothetical 500sqft Ipe deck, I am considering a slight slope for water runoff versus a perfectly level aesthetic. Prioritizing drainage effectively sacrifices a flat visual line at the house transition. Refer to local building codes for specific slope and ventilation requirements before finalizing.
Robert Chen here. Regarding the visual transition between a sloped deck and the house siding, you can mitigate the apparent mismatch by using an oversized trim board or a specialized drainage flashing detail. However, since the necessary gap width depends on your specific substrate and anticipated runoff volume, check the manufacturer’s technical data sheet for required clearances and flashing installation instructions to ensure you aren't voiding the material warranty.
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