LSU AgCenter prevention advice for Lafayette Parish is short: remove wood, cardboard and cellulose from around the home, keep mulch 8 to 12 inches from the foundation, and fix outdoor faucet drips and roof or pipe leaks. This guide explains why each step matters, which ones a homeowner can do alone, which need a trade and how to tell whether the work has held.
Key takeaways
- Remove wood, cardboard and cellulose from around the home, as the AgCenter advises.
- Keep mulch 8 to 12 inches from the foundation, measured at the nearest point.
- Fix outdoor faucet drips and roof or pipe leaks, which keep the soil and wood damp.
- Some fixes are simple owner jobs; a wall, slab or roof repair belongs to a qualified trade.
- A fix is only complete when the soil stays dry through the next heavy rain.
Why does the foundation line matter?
The foundation line is where a colony most often meets the house. Every gap, bridge or damp patch at that line is a route or a condition a colony can use, which is why the AgCenter's advice concentrates on it.
Subterranean termites travel through soil and need moisture. A house with clear soil at its foundation, dry wood at the sill and no cover against the wall gives a colony little to work with. A house with mulch built up to the siding, a woodpile at the eave and a dripping faucet at the corner gives it a route, cover and water in one place.
The AgCenter list was written to address exactly those three things. It takes away the cover, it sets a distance that keeps the soil line clear and it removes the water that keeps the soil damp. Each step is simple, and together they make the foundation a much less useful place for a colony to start.
What counts as wood, cardboard and cellulose?
Any material made from plant fiber that a termite can eat counts as cellulose. That includes firewood, lumber, landscape timbers, fence boards, cardboard, paper, pallets and the wood chips or pine straw that build up at the wall.
The list is wider than most owners expect. Old cardboard boxes in a carport, a stack of newspapers under a porch and a pallet leaned against the house are all cellulose. Mulch and pine straw are also cellulose, and when they are piled above the soil line they become a bridge.
The advice is to remove these from around the home, not only from the immediate wall. A stack five feet away from the house can still be the source of a colony that finds its way to the wall, so the inspection measures the whole zone around the foundation and not only the spot directly against it.
How far should mulch sit from the foundation?
The AgCenter advice is to keep mulch 8 to 12 inches from the foundation. Measure from the wall to the nearest edge of the mulch, not to the middle of the bed, and keep the soil line below the brick or siding wherever possible.
A bed that sits 8 to 12 inches back at its middle but touches the wall at one corner still leaves a route. Measure the corner as well as the middle, and pull the bed back where the distance falls short. Edging the bed helps keep the mulch at the right line.
Some planting needs mulch to survive. In that case, a gravel strip or a narrow band of bare soil at the wall can keep the distance while the planting stays where it is. Choose a plant that tolerates a drier zone near the house, and keep the mulch deeper away from the wall.
| Fix | What it removes | Who usually does it |
|---|---|---|
| Move firewood and lumber off the soil and away from the wall | Cover and a wood-to-soil route | Homeowner |
| Move cardboard and stored boxes out of the carport or under the porch | Cellulose cover near the foundation | Homeowner |
| Pull mulch back to 8 to 12 inches and edge the bed | A soil bridge at the wall | Homeowner or landscaper |
| Shut off or repair a dripping outdoor faucet | A constant source of damp at the corner | Homeowner or plumber |
| Extend a downspout to carry water away from the wall | Water pooling at the foundation | Homeowner |
| Repair a roof leak or a flashing that runs water down a wall | Water inside the wall cavity and the sill | Roofer |
| Repair a pipe leak in a slab or wall | A hidden, long-running source of damp | Plumber |
Why fix the drips and the leaks?
Water keeps the soil and the wood damp, and damp soil is where a colony is easiest to sustain. The AgCenter names outdoor faucet drips and roof or pipe leaks as things to fix, and they are often the cheapest and most effective fixes on the list.
A dripping spigot creates a small, permanent patch of wet soil. A constant drip keeps that patch wet through a dry spell, and over a season the damp can be enough to sustain activity that would otherwise die back. Fixing the drip is one of the least costly steps on the list.
A roof or gutter leak that runs into a wall cavity is harder to see and can be more serious, because the water reaches the sill and the framing. A pipe leak under a slab or behind a wall can be the most hidden of all. These are repairs for a trade, and the owner should not open the wall without a plan.
How do you know the fix has worked?
A fix has worked when the soil at the foundation stays dry through the next heavy rain, the wood reads dry at the same spot and no new tube, soil bridge or wing appears in the following months. Check each of those on a schedule.
Take a moisture reading at each spot before the repair, and again after it has had several dry days. Use the same spot and the same depth each time so the readings can be compared. A reading that falls is a sign the fix is working, and one that stays high is a sign there is another source.
The heaviest test is a long rain. After a storm, walk the foundation and look for water pooling where it did not before. A new damp patch, a downspout that discharges in a new place or a soil line that has washed out is a sign the fix has not held.
What should the owner do in a rental?
In a rental the landlord usually carries the structural fixes and the tenant carries the clearing of cellulose and food. The split should be written down, and the list should name who does each item and when.
A tenant can move firewood, cardboard and stored items away from the wall, and can report a dripping spigot or a damp patch with a date. The landlord can extend a downspout, repair a leak, edge the mulch bed and arrange the trade repairs.
Put the list in writing and agree a date for the next check. A list that is only in conversation tends to be forgotten, and a dated list is what makes the prevention work over a season.
Which fixes do the most good for the effort?
The fixes that remove a standing source of damp, and the cover at the wall, usually give the most result for the least work. Dripping faucets, downspouts that discharge at the foundation and stacked wood against the wall come first.
A fix is worth ranking by two things: how much it changes the condition at the foundation, and how easily it can be done. A drip that wets the soil every day is high on both counts, and a homeowner can usually stop it in an afternoon. Stacked wood against the wall is high on the first count and cheap on the second, since the wood can simply be moved.
Lower on the list are the large jobs, such as regrading a whole side of the house or replacing a slab edge. Those can matter a great deal, but they should be scheduled after the quick wins, so that the cover and the water are gone while the bigger work is planned. The prevention list works best when the order is written down and each item is marked done or not done.
Timing: when should prevention work be done?
Prevention work is best done before the late-spring swarm window, which the AgCenter gives as late April into June for Lafayette Parish. Repairs done in the middle of the peak can disturb the trail and the colony, so the work is timed to start earlier.
A homeowner who starts in February or March has time to move the cover, pull back the mulch, fix the drips and check the gutters before the swarms are expected. The work is done in dry weather, when the soil is easy to work and the moisture readings are easiest to take.
Repairs to walls, slabs and roofs follow the same logic. Opening a wall or lifting a slab in the middle of the swarm season can disturb a colony that is working nearby. Where a repair cannot wait, the inspector should be asked first, so the work is planned around the evidence.
Common mistakes with mulch, gravel and the wall
The common mistakes are piling new mulch against the wall, using wood chips as a substitute for gravel, laying landscape fabric that traps moisture and leaving the soil line bare in a way that washes out. Each one can defeat the purpose of the clearance.
New mulch piled against the wall after a clearance is the most frequent error. A bed that was pulled back in spring and filled again in summer returns to the old condition, and the distance is lost. The clearance should be checked again in the autumn, not only in the spring.
Gravel is a good substitute for mulch at the wall, but only if it is laid so that it drains away from the house. A gravel strip that holds water against the foundation can make the soil wetter than the mulch it replaced. Landscape fabric under a bed can trap moisture beneath it, which is the reverse of the goal. The right choice depends on how the water runs on that side of the house.
Frequently asked questions
Is mulch really a termite problem?
Mulch is cellulose, and mulch piled above the soil line or against the wall can bridge the gap between the ground and the house. The AgCenter advice is to keep it 8 to 12 inches from the foundation for that reason.
Can I use gravel instead of mulch at the wall?
Yes. A gravel strip or a bare band of soil at the wall keeps the distance and the soil line clear. Choose a planting that tolerates the drier zone.
Does fixing the leaks solve the termite problem?
It removes one of the conditions colonies use. It does not find or treat a colony that is already present, so an inspection is still needed where there is evidence of activity.
Who should I call for a slab leak?
A qualified plumber, who can locate and repair the leak. The prevention check can help narrow the search, but it should not open the slab or the wall by itself.
Is there a charge for a prevention check?
Calling is free. Any charge is agreed in writing before the check starts, and no figure is given on this site or over the phone before that.
Sources
- LSU AgCenter, termite prevention advice for Lafayette Parish homes
- LSU AgCenter, termite swarm and inspection pages for Lafayette Parish
This guide is general information for Lafayette Parish homeowners, not a substitute for an on-site inspection. Prices are estimates. See our disclaimer.