Bed Bug Treatment in Park Slope

Why is a two- or three-family house the hardest version of this job?

Because it behaves like a multi-unit building and has none of the apparatus that makes multi-unit buildings manageable.

Around 35.2 per cent of Park Slope’s housing units sit in buildings of two, three or four units. That band is the neighborhood’s characteristic form: a rowhouse built for one household, subdivided at some point in the last century, with the owner living in part of it and the rest let. It is the reason the neighborhood looks residential and functions, for this particular insect, like rental housing.

Consider what a large building has and this one does not.

Staff who see things. A super in a fifty-unit building is in cellars, halls and apartments constantly. A porter notices a discarded mattress in a hallway. That casual, continuous observation is how large buildings catch a problem at one apartment instead of four.

A schedule. Managed buildings inspect on a cycle because somebody’s job description says so. A three-family house inspects when a resident is frightened.

A reserve. A board can commission a program across several apartments from a fund raised for exactly this kind of event. In an owner-occupied house the money comes out of a household’s own account in a single month.

Somebody whose job is access. The super has keys and a legitimate routine reason to be in an apartment. An owner-occupier usually has neither.

Institutional memory. Managing agents keep records. A house changes hands and the new owner has no idea the top apartment was treated in 2016.

What the house does have, in full measure, is the physical continuity that makes this insect a building problem. Floor joists run through from one apartment to the next. Conduit and pipe runs were cut through original framing when the house was converted. The party walls receive the joist ends of both attached buildings, and those pockets were never closed. Baseboard, architrave and floorboards on a nineteenth-century interior have generous gaps by modern standards, and a great many of the original finishes are still in place.

So the insect gets the connectivity of an apartment building and the response capacity of a single-family house. That mismatch is the whole subject of this page.

Where do they actually travel in this construction?

Along the structure, not through the doors — which is why a locked front door on an apartment is not a boundary.

The routes worth knowing in a converted rowhouse, roughly in order of how often they matter:

The joist bay. Floor joists run in one direction across the building, and the space between them is a continuous horizontal void from the front wall to the rear. Where a ceiling below has been penetrated for a light fitting, or where floorboards above have gaps at the ends, that bay is accessible from both flats. It is the most direct connection between a bedroom on one floor and a bedroom on the next.

Retrofitted service runs. Every conversion cut new routes: electrical conduit, cable and telecoms drops, a plumbing chase for the new bathroom, a boiler flue, a radiator pipe dropped through a floor. Each of those is a hole through a floor or a wall that nobody sealed, and each connects two units.

The party wall pockets. The recesses that receive the joist ends of both attached buildings were not closed on nineteenth-century construction. That is a set of small horizontal voids inside the shared masonry at every floor level. They matter less for this insect than for a mouse, because the distances are longer and the environment less hospitable, but they are not zero, and they explain the occasional case that appears to have come from next door.

The common parts. Even a three-family house has a shared entrance hall and a stair. Where an upholstered chair, a runner or a stored item sits in that hall, it is a staging post between units.

Objects, which are the fastest route of all. A bag set down in one apartment and carried to another. A borrowed suitcase. A piece of furniture moved down a stair.

The practical consequence is the same one every multi-unit building learns eventually. A confirmed case in one flat means the apartments above, below and adjoining are inspected as part of the job. That is not an upsell, and it is not a comment on the neighbors. It is the minimum ring that has any chance of describing the building’s actual state, and in a building of three or four units it means inspecting the whole thing.

How does an infestation reach a Park Slope household?

By ordinary means that say nothing about anybody, plus one route that is specific to a neighborhood of stoops.

The general routes are travel, visiting, second-hand goods and shared laundry, and none of them correlates with housekeeping, income or the condition of a home. This deserves saying plainly because shame is one of the main reasons these problems are reported late, and late reporting is the difference between one apartment and four. A household that mentions a suspected case in week one has an easier job, a cheaper job and a better relationship with the rest of the building than one that waits until the bites are unmistakable.

The route worth naming here is furniture left out. In a neighborhood of stoops and curbside collection, useful-looking items are put out constantly, and a proportion of them are being discarded precisely because the household has a problem. A mattress or an upholstered chair on a curb is the highest-risk object anybody in this neighborhood will walk past this week, and it is free, which is the trap. The same applies with lower probability to second-hand furniture generally, and it is easily managed: hard furniture can be inspected thoroughly at the joints and undersides before it comes through a door; upholstered furniture cannot be inspected to any useful standard and is a genuine gamble.

Shared laundry is the second local route. Many converted houses have a machine in a cellar shared between flats. It is a good place for the insect to move between households on soft items, and it is a good place to interrupt that, because a hot dry cycle is one of the few things a resident can do that reliably works.

The third is turnover. Rental units in this neighborhood change hands, and every move-in is a delivery of furniture and boxes from somewhere else. That is not a risk to be avoided — people have to live somewhere — but it is a reason to inspect a unit at the point of turnover rather than to assume that an empty apartment is a clean one.

What does a vacancy between tenancies make possible?

The only genuinely easy version of this job, and it is worth planning around.

Almost everything that makes bed bug work slow, expensive and partial is a consequence of the flat being occupied. Contents have to be protected, worked around or handled. Residents have to prepare, which means negotiating a list of tasks with somebody who did not ask for any of this. Access has to be arranged repeatedly. Treatments that involve heat or extended vacancy have to be weighed against displacing a household. Furniture that ought to be discarded stays because it is somebody’s only sofa.

An empty apartment has none of that. It can be stripped, inspected properly at every seam and joint, treated thoroughly, and monitored with interceptors while nobody is disturbing them. Floorboard gaps and baseboard can be worked on. Where a unit needs any structural closure — sealing conduit penetrations, closing the gap where a pipe drops through a floor into the apartment below — that work is straightforward with the rooms clear and awkward with them full.

So the operational advice for an owner of a small multifamily house is unglamorous and specific: if a unit is turning over anyway, put the inspection and any necessary work into that window deliberately. It is the cheapest month this job will ever have. It is also the moment at which a landlord can honestly satisfy themselves about the condition of a unit before somebody’s belongings arrive in it, which is worth something to both parties.

The corollary is that a vacancy is not evidence of absence. An unoccupied flat with no host goes quiet; the insect becomes inactive and hard to find, and monitors that depend on a host produce nothing. An inspection of an empty unit has to be a physical examination of harborage — seams, joints, screw holes, the backs of baseboard, the undersides of anything left behind — rather than a reliance on activity.

What does an inspection have to cover in a house cut into three?

Every unit in the program, the common parts and the cellar, in one coordinated pass rather than three separate visits a month apart.

The physical method is the same anywhere: a slow, systematic examination of harborage, working outward from where people sleep and sit. Mattress and box spring seams, piping and tags. Bed frame joints, screw holes and the underside of slats. Headboards, including behind them where they meet a wall. Upholstered furniture at seams, under cushions, and inside the dust cover on the base. Then the room: baseboard, particularly where it has pulled from the wall, the edges of fitted carpet where there is any, curtain hems, picture frames, and the electrical fittings on the wall behind a bed.

What a nineteenth-century Park Slope interior adds is inventory. Original wide-plank or narrow-strip floorboards with gaps at the joints. Deep molded baseboard and architrave installed before anybody cared about a tight fit, now with a century and a half of seasonal movement in it. Plaster on lath with cracks at every corner. Panelled shutters folded into window reveals, which are a genuinely productive harborage nobody thinks to open. Original doors with panelled construction and gaps at the moldings. Marble mantels with a void behind them. Built-in cupboards flanking a chimney breast.

That is a much longer crack-and-crevice list than a modern apartment, and it is why an honest inspection of one of these rooms takes real time.

Two further points specific to the housing band.

The common parts count. A shared entrance hall with a stored buggy, a stair runner, an upholstered chair by the door. In a house with no staff, nobody has ever inspected these.

The cellar counts, mostly for what is stored there. Suitcases, boxes of textiles, a spare mattress on end against a wall. That is where an item introduced two years ago has been quietly sitting.

Where evidence is ambiguous — and it often is, because bites are not diagnostic and reactions vary enormously between people — the correct answer is monitoring rather than a treatment applied on suspicion. Interceptors under bed and furniture legs, passive monitors in harborage, left in place and checked. It is slower and it is far cheaper than treating a building for something it does not have.

Which methods fit a house with people living over and under the work?

The ones that can be applied unit by unit without moving the problem, and the choice is a building question rather than a preference.

The general approaches are set out under bed bug treatment. What changes in a converted attached rowhouse is the constraint set.

Attachment on two sides limits heat. Whole-room heat raises the temperature of the structure, and in a rowhouse a share of that structure is shared with two neighboring buildings that have not agreed to anything. There are also practical limits inside the flat: contents that will not tolerate it, old finishes, wax, adhesives, and the electrical and plumbing services threaded through a hundred-and-forty-year-old fabric. Heat has a real place in this work. It is not a default, and anyone who offers it as one without surveying the building has not assessed the building.

Occupied apartments above and below limit anything that displaces. Whatever is applied in one unit should not push the population into the next. That is an argument for targeted work at harborage and against broad, aggressive treatment of surfaces, which scatters rather than reduces.

Old finishes limit what can be applied where. Original plaster, historic joinery and wallpapered surfaces all constrain the method, and on the interiors people in this neighborhood care about, that constraint is worth respecting rather than arguing with.

No staff limits the follow-up. A method that depends on a precise sequence of return visits requires somebody to make them happen. In a building with a super that is routine; here the owner is the scheduler, and the schedule has to be realistic about that.

Encasements and interceptors are the quiet workhorses. A mattress and box spring encasement removes an entire category of harborage permanently and makes future inspection trivial. Interceptors give a small building the monitoring capability it otherwise lacks. Neither is a treatment, and both are why an owner-occupied house can run something resembling a program.

The structural half — sealing conduit penetrations, closing floor and wall gaps between units, dealing with the chases — belongs with structural exclusion in Park Slope, because it is the same set of openings that carries rodent control in Park Slope and cockroach control in Park Slope traffic. Closing them once serves all three.

What does the December filing require of somebody who thinks they own a house?

An annual report, a receipt distributed to residents, and an honest understanding of what the building is classified as.

Owners of multiple dwellings — with co-operatives and condominiums included — file an annual bedbug report with HPD each December, under Housing Maintenance Code sections 27-2018.1 and 27-2018.2, then distribute the receipt at lease commencement or renewal, or post it prominently. That is a scheduled obligation with a fixed month attached to it, and it is the one that owners in this housing band most often have never heard of, because nothing about buying a brownstone with two rental flats announces that you have become the operator of a multiple dwelling.

The precise threshold and classification for a specific building is a question for the agency and for the owner’s own professional advice, not for a pest contractor, and we will not pretend otherwise. What we can say is that the arithmetic of this neighborhood puts a great many houses at or over the line, and that finding out is straightforward and better done in a quiet month than in a dispute.

Around that filing sits the rest of the framework. The general duty on the owner to keep a dwelling free of pests, and to exterminate where infestation is present, is at the NYC Housing Maintenance Code and pests. The scheduled investigation and integrated pest management requirements for multiple dwellings are at Local Law 55, and they include the sealing and moisture measures that make up the durable half of this work. Where duties and access are contested between an owner and a resident, landlord and tenant pest responsibilities sets out how they usually divide. Where a pesticide is applied in a multiple dwelling, notification obligations attach — Local Law 36 pesticide notification and the New York neighbor notification law — with the licensing side at New York State pesticide applicator requirements. Buildings under board governance have their framework at co-op and condo board obligations, and anyone comparing proposals should read choosing a pest control contractor.

What should a household do in the first week, and what makes it worse?

A short list of useful actions and a shorter list of genuinely damaging ones.

Useful, in order:

Stop and report. Tell the owner, or if you are the owner, tell the other residents. Every day of silence is a day the ring gets wider.

Confirm before acting. Collect a specimen if you can, in a sealed container or taped to a card. Bites alone are not diagnostic, reactions differ wildly between people, and a firm identification changes the whole shape of what follows. The bed bug profile covers what the insect and its evidence actually look like.

Launder and dry hot, then bag. Bedding, clothing from the affected rooms, soft furnishings that will take it. The dryer is the part that does the work.

Keep sleeping in the room. This is counter-intuitive and it is the single most valuable instruction on this page. Moving to a sofa in another room, or to another flat, takes the host away from the established population and encourages it to disperse in search of one. A one-room problem becomes a three-room problem, and in a converted house it becomes a two-apartment problem.

Clear the floor. Not the cabinets, not the wardrobes — the floor, and the perimeter of the room, so that edges and baseboard can actually be reached.

Put interceptors under the bed legs if you can get them quickly. They cost very little and they turn a suspicion into a record.

Damaging, in order of how much harm it does:

Moving furniture out through the building. A mattress carried down a shared stair to a curb has just seeded the hall, the stair and possibly the flat it passed. If something genuinely must go, it is wrapped and sealed before it leaves the room, and it is marked so nobody takes it home.

Retail aerosols and foggers. These scatter a concentrated population into voids across a much larger area, and they can make the professional work that follows materially harder and longer.

Throwing out the bed immediately. The frame and mattress are the easiest places to treat and the easiest to monitor. Discarding them removes information and money and does not remove the population, which is in the room rather than in the object.

Silence. Which is the most common and the most costly.

How do you know it is finished when nobody is watching the building?

By building the watching in, because in a house with no staff there is nothing else.

The end condition for this work is never the absence of bites. Reactions vary, some people never react at all, and a low residual population can go unnoticed for months and then rebuild. The end condition is a period of clean monitoring across every unit in the program, running long enough to cover the egg stage and the interval it takes a survivor to feed and be caught.

In practice that means interceptors under the legs of beds and upholstered furniture in every unit, left in place after the visits stop rather than collected on the last day. It means passive monitors in harborage in the common parts and the cellar. It means somebody agreeing to look at them on a set day each month, and to say so if anything appears. And it means the encasements staying on, because they keep the largest piece of furniture in each room permanently inspectable.

That is a modest and genuinely achievable substitute for a superintendent, and it is the difference between a building that finds the next case at one apartment and a building that finds it at three. It also costs almost nothing once the work is done, which matters in a housing band where the money comes out of a household’s own account.

For what this neighborhood’s stock produces across every service, see pest control in Park Slope; the New York City hub explains how the city work is organized. Brooklyn Heights is the same converted-rowhouse problem in older fabric, the Upper East Side is the version with staff and a board, and on Long Island Garden City is the detached, owner-occupied contrast where none of the multi-unit machinery applies at all.

If you have found something and are not certain what it is, send us a description of what you found and where before anything gets sprayed or thrown out.

Related

• Bed Bug Treatment — how we approach it
• All pest control in Park Slope
• Rodent Control in Park Slope
• Cockroach Control in Park Slope
• Structural Exclusion in Park Slope