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While both underground and above-ground downspout extensions are a step up from no downspout extensions, underground downspouts are better for those looking for a more discreet option. Underground downspouts are hidden away—out of sight, out of mind. You won't be bumping into the extended sections with your lawn mower, nor will you see the downspouts sticking out like a sore thumb.

Whether or not you can use a pressure washer to clean your gutter guards depends on the type of gutter guard you have and the strength of the pressure washer. Most gutter guards can handle a low-pressure setting but check first. If you’re unsure if your gutter guard is designed for pressure washing, check your manufacturer’s instructions, ask a pro, or use a garden hose to clean the gutter guard instead. As gutter guards age, they become less resistant to the strong forces of a power washer, so treat older gutter guards with more care.

The cost to install a downspout extension or reroute a downspout generally falls between $30 and $200. The final price depends on factors like whether you DIY the project or hire a gutter professional, the complexity of your gutter system, and the length of the new extension. A simple, above-ground DIY installation can cost as little as $30 for materials. In contrast, a more complex project involving professional installation and digging trenches for underground piping could cost over $1,000. This is still a significant saving compared to replacing your entire gutter system, which costs around $1,900 on average.

Buried downspouts can freeze during cold weather as cold water runs through them. If you’ve discovered your downspouts are frozen, you can carefully pour hot water down the top of the downspout to defrost them. If that doesn’t work, you may need to dig your downspout back up. Avoid trying to break the ice from the exterior using a hammer as this can cause cracks and damage to your downspout.

To avoid freezing the future, consider adding a heating cable to the exterior, which can adjust heat based on the surrounding temperature.