Why Louisiana gutters and roofs are different.

The rain number nobody quotes correctly

Baton Rouge averages 61.94 inches of rain a year, per the National Weather Service's 1991–2020 climate normals. The contiguous US average is about 30 inches. So we get roughly double.

But the total isn't even the hard part. Most wet places have a dry season — a stretch where the roof gets a break. We don't. Every single month here is a four-inch-plus rain month. Your roof and gutters never get to sit idle and dry out.

That's why gutter sizing matters more here than the national guidance suggests. A five-inch gutter that's fine in a drier state can overshoot on a steep Louisiana roof in a hard afternoon storm.

Our live oaks shed in spring, not fall

This is the big one, and it's the reason the national maintenance calendar doesn't fit.

LSU AgCenter puts it plainly: live oaks “keep their leaves all year-round, except for the small window when flushing out new leaves in the springtime.” And in the same breath: “as the leaves fall, live oaks produce male flowers called catkins.”

Catkins are the problem. They're stringy, they come down in enormous quantities, and they mat together into a dense pack that water can't move through. In a gutter they behave worse than leaves — and they arrive in March and April, six months out of step with every “fall gutter cleaning” ad you'll see.

So the honest schedule for most Ascension Parish homes is twice a year:

• Late fall — pines, sweetgums and the general leaf drop
• Spring — live oak leaves and catkins, ideally before hurricane season

August is when your roof gets tested

Historically, August is Louisiana's worst month for hurricane landfall. Wind damage is sneaky — it breaks the adhesive seal on shingles and lifts them without taking them off, so the roof looks fine from the driveway and leaks in the next ordinary rain.

Add year-round humidity that keeps decking damp and summer heat that cooks asphalt shingles daily, and a roof rated for 25 years somewhere else does not get 25 years here. That's not a sales pitch. It's the reason we look for free.

The mosquito angle most people don't know

The Louisiana Department of Health lists “clean roof gutters routinely” among its official mosquito-control measures, with the note that “clogged gutters can produce millions of mosquitoes annually.”

Standing water in a gutter is exactly the habitat mosquitoes want — shallow, still, sheltered, and full of organic matter. If you've ever wondered why your yard is worse than your neighbor's, look up.

What this means for your house

• Two cleanings a year, not one, unless you have almost no tree cover
• Fine mesh matters more here if you have live oaks or pines — catkins and needles pass straight through anything coarser
• Gutter sizing is a real decision, not a default, given the rain volume
• Get the roof looked at after any named storm, while the timeline is fresh for an insurance claim
• Downspout discharge matters — Louisiana clay swells and shrinks, and water dumped at the slab is a foundation problem waiting to happen