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Serving Maricopa County

Pest Exclusion and Sealing in Phoenix, AZ

Closing the cracks, eave gaps, vents and pipe openings that let scorpions, roof rats and roaches into a Phoenix home.

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  • Bark scorpions, roof rats and bee swarms
  • Price approved before treatment
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Exclusion

Exclusion & Sealing: what it covers

Quick answer

Pest exclusion in Phoenix means closing the openings pests use to enter: cracks near 2 millimeters that bark scorpions can pass, gaps under eaves and unscreened roof vents that roof rats use, and the pipe and door gaps that roaches and others exploit. Phoenix Pest Control answers 24/7 and connects you with an independent local company, with the price confirmed before work.

Exclusion & Sealing illustration for Phoenix, AZ

Treatment kills what is there. Exclusion decides what can come next. In a city where a bark scorpion can slip through a crack of about 2 millimeters and a roof rat can walk from a palm to the eave, sealing is where a lot of the lasting result comes from.

This page is about the building itself: where the gaps usually are, what a technician closes first, and what is better left to a builder, roofer or landscaper. It also explains why sealing and treatment belong in a particular order, because closing a house up at the wrong moment can make a problem worse.

Service area
Phoenix & Maricopa County
Availability
Phones answered 24/7

What gaps can a bark scorpion actually get through?

A bark scorpion can pass through a crack of about 2 millimeters and is the only Arizona scorpion that can climb walls and ceilings. That means gaps at door thresholds, weatherstripping, pipe penetrations and stucco cracks can all matter, and a gap you can barely see may still be an entrance.

Think small. A door that looks closed in daylight can still show a sliver of light at the bottom, and a sliver is plenty for a scorpion. Because they climb, openings high on a wall count as much as those at the floor.

A technician works through the house in a pattern: exterior doors first, then garage, then windows and screens, then the places where pipes and wires enter. Most of the fixes are small and cheap, which is why sealing is worth doing even when the yard is also being treated.

Which openings do roof rats use?

Maricopa County tells residents to seal gaps under eaves and screen roof vents, because roof rats reach the roofline along power lines, rock fences, tree branches and palms. A technician checks those entries and what leads to them, since closing a gap does little if a branch still hands the rats a ramp.

The roofline is easy to ignore from the ground. A technician looks at the eaves, the vents and the places where utility lines come in, and flags damaged trim or vent covers.

Order matters here. Rats that are still active should be dealt with before the openings are closed, because sealing animals inside makes a larger problem. Once activity stops, closing the gaps is what keeps the next ones out.

Why do roaches come up through pipes, and can sealing help?

American cockroaches live in sewers and enter homes through pipes, and monsoon season brings more roach and ant calls. Sealing the gaps around pipe and drain openings narrows the routes. It does not replace treatment, but it limits how many get through.

Look under sinks and around where pipes pass through walls or floors. Gaps around those pipes are the sort of opening a technician can close, and the garage is worth a look too. The pest side of this is covered under cockroach control, and sealing is its natural companion.

What sealing cannot do is stop a roach that comes up the pipe itself. That is a treatment job, and the technician will say which part of the problem each approach covers.

Which jobs need a builder rather than a pest technician?

A pest technician seals small gaps and screens vents, but larger repairs, such as rebuilding eaves, re-stuccoing a wall or replacing a damaged roof vent, usually need a roofer, stucco contractor or mason. The technician tells you what is beyond the scope and what the opening is letting in.

That honesty is part of the service. If a wall cap is missing along a long run of block wall, the right answer may be a mason, and the technician says so rather than patching it badly.

Older homes, such as the 1930s and 1940s houses of Encanto-Palmcroft, have attic and eave entry points that can be more complex than a tract home. A technician checks them and explains which are quick fixes and which are repairs for another trade.

Warning signs

Signs you need exclusion & sealing

Do not seal openings while rodents or bees may still be inside, because trapped animals look for another way out. Do not climb onto a roof to screen vents without proper equipment. Keep sealant and any treatment product away from children and pets until dry.

  • Scorpions turning up inside even after the yard has been treated
  • Daylight visible around the edge of an exterior door, especially at the threshold
  • Gaps where plumbing or electrical lines pass through exterior walls or the garage
  • Open or damaged roof vents, soffit gaps or loose eave trim
  • Rodent droppings or gnaw marks near the roofline
  • Cracked stucco, open mortar joints or missing caps on hollow-block walls
  • Large cockroaches appearing around drains or pipe openings in warm months
  • Torn window or door screens
Our process

How our exclusion & sealing visit works

  1. Walk the exterior

    The technician checks foundation edges, stucco cracks, door and window thresholds, pipe and wire penetrations, garage seals, eaves and roof vents.

  2. Check what touches the house

    Wall tops, rock fences, tree limbs, palms and power lines can give pests a route to the roofline, so the visit includes what sits next to the structure.

  3. Decide order of work

    If rodents are active, trapping or baiting comes before sealing so no animals are trapped inside. If it is scorpions, treatment of the harborage is paired with sealing.

  4. Close the openings

    Gaps are filled, vents screened and door sweeps or weatherstripping fitted, using materials suited to the opening. Larger repairs may be flagged for a builder or roofer.

  5. Show you what changed

    You are told which openings were closed, which remain and why. The price is explained and approved before work starts.

Options

Types and options for exclusion & sealing

Scorpion entry sealing

Focuses on small gaps near 2 millimeters: door thresholds, weatherstripping, window screens, pipe penetrations and cracks along the foundation. It pairs with scorpion control rather than replacing it.

Roofline and rodent sealing

Targets gaps under eaves and unscreened roof vents, the openings the county tells residents to close. It follows trapping or baiting under roof rat control.

Wall and landscape changes

Stuccoing and capping hollow-block walls reduces the shelter scorpions use, and landscaping rock of about half an inch or less makes it harder for them to move. Dedicated yard work is covered under block wall and rock yard treatment.

Cost

How much does exclusion & sealing cost in Phoenix?

No Phoenix price range for exclusion work has been sourced, so none is printed. Quotes follow the building, not a flat rate.

Exclusion & Sealing pricing in Maricopa County (2026)
JobTypical rangeWhat it includes
Size and layout of the houseQuoted on sitea larger house with more doors, windows and penetrations has more to check and close
Number and type of openingsQuoted on sitea few small gaps are a quick fix, while a long run of cracked stucco or many vents is a bigger job
Roof and height accessQuoted on siteeaves and roof vents that need ladders or roof access cost more than ground-level work
Wall caps and stucco repairQuoted on sitelong hollow-block wall lines and stucco work may be quoted separately or handed to a trade
Follow-up visitQuoted on sitea recheck to confirm activity has stopped is priced as part of the job or per visit

These are cost drivers, not a price list. Your exact price is confirmed on site before any work starts.

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If it's an emergency, call now. For non-urgent exclusion & sealing, send the form and we'll call you back.

Maricopa County

Why exclusion & sealing is different in the Salt River Valley

Phoenix buildings are shaped by walls and rock. The sourced scorpion shelter is hollow-block walls, rock facades, river rock and irrigation boxes, and sealing the house addresses only half of that. The yard and wall are the other half.

Rock size is the sourced detail in Phoenix yards: rock of about half an inch or less makes it harder for scorpions to move between stones, and coarser rock gives them places to hide.

New builds on former farmland, such as parts of Laveen and Estrella, and older cores like Willo and Encanto, call for different checks. The technician looks at what each house actually has, because the sourced material does not describe the construction of either.

Related

Scorpion Control

Bark scorpion inspection and treatment for block walls, rock yards, irrigation boxes and the gaps that let them inside.

Roof Rat Control

Roof rat inspection, trapping and sealing for citrus-belt homes in Arcadia, central Phoenix, Ahwatukee and beyond.

Block Wall & Rock Yard Treatment

Treating the hollow block walls, rock beds, boulders and irrigation boxes where Phoenix bark scorpions shelter, and fixing what makes them welcome.

Cockroach Control

Treatment for American cockroaches that live in sewers and enter through pipes, plus the monsoon-season surge in roach calls.

Guides

Read before you book

FAQ

Exclusion & Sealing FAQs

Will sealing my house keep scorpions out completely?

No. Sealing reduces entry through gaps near 2 millimeters, but scorpions also shelter in block walls and rock outside, and sealing does not remove those. It works best with treatment and yard changes.

Do I seal before or after rodent treatment?

After. If rodents are still active, closing the openings can trap them inside the structure. A technician deals with the animals first and seals once activity has stopped.

Which gaps matter most for roof rats?

County guidance names gaps under eaves and unscreened roof vents. A technician also checks what leads to them, such as branches, palms, rock fences and power lines.

Should I cap my block walls?

Stuccoing and capping hollow-block walls reduces scorpion harborage, according to Arizona extension guidance. It is a masonry job rather than a pest one, so ask the technician what they see and whether a mason is needed.

Can I seal gaps myself?

Small ones, yes, such as a door sweep or weatherstripping. For anything high on the roofline or that involves a rodent problem, call a technician first. Sealing in the wrong order can make things worse.

How do I know what has been sealed?

The technician explains which openings were closed, which remain and why. Ask for a list so you can check the work later. The price is explained and approved before work starts.

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