Preparing for Insect Heat Treatment

By Richard Collings | 20 May 2025 |

How to Prepare Your Home for Professional Heat Treatment

Preparing for Insect Heat Treatment: The Complete Homeowner’s Checklist

Getting ready for bed bug, clothes moth, carpet beetle or flea heat treatment? The better you prepare, the better your results.

Professional insect heat treatment is one of the most effective ways to wipe out stubborn infestations in one go. Companies like MothKill use specialist equipment to raise room temperatures to well over 56°C and hold them there long enough to kill insects in all life stages – eggs, larvae and adults – tucked deep inside furniture, fabrics and cracks. Mothkill+1

But success doesn’t just depend on the technology. How you prepare your home before technicians arrive makes a huge difference to safety, effectiveness and how quickly you can get back to normal.

This friendly guide walks you through:

What insect heat treatment actually does
Why preparation is critical
A room-by-room heat treatment preparation checklist
What to remove (and what to leave)
How to protect your belongings
What to expect on the day and afterwards

Throughout, we’ll reference MothKill’s own guidance and trusted sources like the EPA, BPCA and UK local councils, so you can feel confident you’re following best practice. Southwark Council+3Mothkill+3epa.gov+3

What Is Insect Heat Treatment?

Insect heat treatment is a chemical-free pest control method that uses high temperatures to kill insects where they hide. Professional systems heat the air inside a room (or whole property) to a carefully controlled temperature, usually above 56°C, and keep it there for several hours. Mothkill+1

This approach is particularly effective against:

Bed bugs
Clothes moths
Carpet beetles
Fleas

According to MothKill, heat treatment is effective because it reaches every nook and cranny that sprays and powders might miss – inside mattresses, behind skirting boards, inside wardrobes, and deep in carpets or cracks. Mothkill+1

The British Pest Control Association (BPCA) highlights that heat is a powerful, non-toxic option that can clear bed bug infestations in a single treatment when done correctly. British Pest Control Association

Why Preparing for Heat Treatment Matters So Much

Think of insect heat treatment as a powerful “whole-room oven”. For it to work properly:

Hot air must be able to circulate freely around furniture, belongings and into cracks.
Heat-sensitive items (electronics, aerosols, candles, plants, certain plastics, etc.) must be protected or removed.
The home must be safe for equipment, technicians and, of course, you.

MothKill emphasises the importance of decluttering, protecting sensitive items, laundering fabrics and rearranging furniture before treatment begins. Mothkill The U.S. Environmental Protection Agency (EPA) and UK councils say the same: preparation is “crucial” for successful bed bug/heat treatments. epa.gov+1

The more thoroughly you prepare, the more likely it is that:

All insects – including eggs – are exposed to lethal heat
Your belongings remain safe and undamaged
You only need one treatment, not repeat visits

Step-by-Step: How to Prepare for Insect Heat Treatment

1. Declutter and Clean (Without Moving Bugs Around)

Goal: Make it easy for hot air to flow everywhere while avoiding spreading insects to new rooms.

MothKill’s preparation guide starts with decluttering and a meticulous clean-up of any rooms being treated. Mothkill Councils like Southwark and Bedford also recommend extensive vacuuming and decluttering before bed bug treatments. Stroud District Council+2Bedford Borough Council+2

Focus on:

Removing piles of clothing, bags and boxes from floors
Clearing under beds, sofas and furniture
Sorting out stacks of magazines, toys, paperwork and random items

Important:

Avoid moving infested items into untreated rooms unless they’re bagged and sealed.
Don’t throw potentially infested items straight into communal bins without sealing them first – you might spread the problem.

Once clutter is reduced:

Vacuum thoroughly, paying extra attention to:
- Corners and edges of rooms
- Skirting boards and floorboards
- Mattress seams, bed frames and sofas
- Under furniture and behind radiators
Immediately seal and discard the vacuum bag (or empty the canister into a sealed bag) in an outdoor bin, as recommended by multiple UK council pest teams. Stroud District Council+2Bedford Borough Council+2

2. Identify and Protect Heat-Sensitive Items

High temperatures that kill insects can damage certain belongings. MothKill lists these as items that should be removed, protected or clearly marked “DO NOT HEAT”: Mothkill

Electronics (computers, TVs, game consoles, some speakers)
Batteries and power banks
Candles and wax products
Cosmetics and toiletries (especially those that melt)
Aerosols and any pressurised cans (deodorant, hairspray, cleaning sprays) Extreme Bed Bug Control+1
Flammable liquids or chemicals (solvents, paint, fuels)
Certain types of artwork, vinyl records and delicate musical instruments
Sensitive medication and medical equipment

What to do with these items:

Ask your pest control company (e.g. MothKill’s Questions page) where to safely store them – often a cool, untreated room or off-site. Mothkill
Some companies prefer items to be left but clearly labelled so technicians can decide whether to remove or shield them.

If you’re uncertain about a particular item (for example, a rare collectible or antique), ask your provider before treatment day.

3. Prepare Clothing, Linens and Soft Furnishings

Insects love fabrics. Bed bugs, moths, fleas and carpet beetle larvae are all happy to hide in:

Bedding and duvets
Curtains and throws
Piles of clothes
Soft toys, cushions and pet bedding

MothKill recommends washing and drying fabrics on high heat before treatment where possible, then sealing them to stop re-infestation. Mothkill This mirrors EPA guidance on preparing for bed bug treatment: high-heat laundry is one of the most reliable DIY tools you have. epa.gov+1

Checklist: Fabric Preparation

Bag Items First
- Place bedding, clothes and other washable fabrics into plastic bags in the infested room so insects can’t drop off on the way to the washing machine.
Wash Hot (if care labels allow)
- Use 60°C or higher cycles for bed linen, towels and sturdy clothes.
- Delicate items: use the highest safe temperature.
Tumble-Dry on High
- A hot dryer cycle (20–30 minutes minimum) is very effective at killing insects and eggs in fabrics. epa.gov+1
Store Clean Items Safely
- Once washed and dried, place items in clean, sealed bags or lidded plastic boxes.
- These are usually kept in a designated safe area or reintroduced after treatment following your provider’s instructions.

For clothes you can’t wash on high heat, talk to your pest control technician. Some items may be treated in place during the heat treatment; others might need alternative handling.

4. Rearrange Furniture for Maximum Airflow

To work properly, hot air must circulate around and behind furniture, not just in front of it. MothKill and several other providers suggest moving items a few inches away from walls and ensuring technicians can access all sides of beds and key furniture. Mothkill+2Bed Bugs Be Gone Now+2

Do:

Pull beds, sofas and wardrobes a little away from walls (unless your provider says otherwise).
Make sure there’s a clear path for technicians to walk and for large hoses, heaters and fans.
Open wardrobe doors, drawers and cupboards so heat can reach inside.

Don’t:

Stack furniture too tightly or pack items so closely that air cannot move between them.
Seal up cracks or crevices before treatment – insects hiding inside still need to be exposed to heat first. Save sealing for after treatment.

5. Pets, Plants and People: Keeping Everyone Safe

Heat treatment is not suitable for:

People
Pets (including reptiles, fish and small mammals)
Houseplants

MothKill notes that all living things that can’t tolerate high heat must be temporarily removed from the treated areas. Mothkill Many other providers give similar advice: pets, plants and sometimes aquariums all need safe alternative accommodation during treatment. Bed Bugs Be Gone Now+1

Before treatment day:

Arrange for pets to stay with friends, family or a pet-boarding service for the duration of treatment (and any cool-down period).
Move houseplants and aquariums to an untreated room or another property as advised.
Plan where you and your household will go during treatment – for several hours you may not be able to stay inside.

Your pest controller will tell you when it’s safe to return and how long rooms need to cool and ventilate afterwards.

6. Follow Your Provider’s Checklist to the Letter

Every pest control company has its own detailed preparation checklist, based on:

The pests being targeted (bed bugs vs moths vs fleas)
The equipment they use
Your property layout and specific risks

MothKill, for example, provides tailored advice on: Mothkill+2Mothkill+2

How to prepare specific rooms (bedrooms vs lofts vs living rooms)
What to do with clothing, books, artwork and other items
How long treatment is likely to take and what to expect on the day

Other sources, like the EPA’s “Preparing for Treatment Against Bed Bugs”, give more general guidance on reducing clutter, moving beds away from walls and using mattress encasements after treatment. epa.gov+1

Top tip:

Print your provider’s checklist, tick things off as you go, and send them photos or questions before treatment day if you’re unsure about anything.

This partnership approach – you preparing thoroughly, them treating expertly – is what gives heat treatment its excellent success rate. Poulin's Pest Control+1

What to Remove vs What to Leave for Heat Treatment

One of the most confusing parts of preparing for insect heat treatment is deciding what stays and what goes.

Items to Remove (or Clearly Mark “Do Not Heat”)

Based on guidance from MothKill and other specialists, you’ll typically remove or set aside: Braman Termite & Pest Elimination+4Mothkill+4Extreme Bed Bug Control+4

Electronics: TVs, desktop computers, some laptops (depending on advice), external hard drives
Batteries and power banks
Pressurised containers: aerosol cans, gas canisters, spray paints
Flammables: solvents, fuels, alcohol, some cleaning chemicals
Meltable items: candles, wax melts, chocolates, some cosmetics
Delicate items: stringed instruments, some artwork, antiques, some plastic or foam items
Houseplants and aquariums
Medications that must be stored below specific temperatures

Don’t just guess; ask your pest control provider for a written list of items that must be removed or protected.

Items to Leave in Place

To make sure all insects are exposed to lethal heat, most soft furnishings and large items are best left in the treatment zone. Providers like MothKill and others usually want you to leave: Braman Termite & Pest Elimination+4Mothkill+4Bed Bugs Be Gone Now+4

Beds and mattresses
Sofas, armchairs and upholstered furniture
Wardrobes, chest of drawers and bedside tables (with drawers slightly open)
Clothing in drawers or wardrobes (unless told to bag and launder first)
Rugs and carpets
Curtains and blinds (unless clearly heat-sensitive)

This might feel counter-intuitive, especially if you’ve been tempted to drag everything outside. But remember: if you move infested items away from the heat, you may take insects with you.

What Happens on the Day of Heat Treatment?

While exact procedures differ between companies, a typical insect heat treatment day might look like this:

Technician arrival & final checks
- Your provider walks through each room, checks preparation, and may ask you to adjust or remove a few last items.
- They’ll position heaters, fans and temperature sensors.
You, your family & pets leave the property
- The property (or affected area) is sealed so heat can build up effectively and safely.
Heating phase
- Technicians gradually increase room temperature to the target range (often 56–60°C) and maintain it for several hours. Mothkill+1
Cool-down & ventilation
- After the required time at high temperature, equipment is switched off and rooms are allowed to cool.
- Technicians may open windows and doors to speed up the process.
Post-treatment check
- The team returns furniture to its usual place and may carry out spot inspections or apply supplementary measures if needed.
Re-entry & aftercare advice
- Once temperatures are safe, you’ll be allowed back in and given instructions on:
  - Cleaning dead insects and debris
  - How long to keep certain covers or encasements in place
  - Monitoring for any remaining activity

Aftercare: What to Do Once Heat Treatment Is Complete

Preparation doesn’t stop once the heaters leave. Good aftercare helps you stay insect-free long term.

1. Follow Cleaning Instructions

Your technician will explain when it’s safe to start cleaning. Common advice includes:

Light vacuuming to remove dead insects
Wiping down surfaces to remove dust from the treatment
Continuing to dispose of vacuum contents in sealed bags

2. Consider Mattress and Pillow Encasements

The EPA suggests using bed bug-proof encasements on mattresses and box springs after bed bug treatments; these can trap any missed insects and prevent new ones from settling in. epa.gov+1

Even when targeting other insects like clothes moths or fleas, encasements can provide an extra barrier in bedrooms.

3. Seal Cracks and Crevices

Once you’re confident the infestation has been eliminated:

Seal gaps in skirting boards, floorboards and around pipes
Repair peeling wallpaper or loose wall panels
Install door sweeps if advised

This makes it harder for future pests to find cosy hiding spots.

4. Keep Up Smart Prevention Habits

To reduce the risk of a repeat infestation:

Inspect second-hand furniture and fabrics carefully before bringing them inside.
When travelling, check hotel beds and keep luggage off the floor (the CDC has simple travel bed bug tips). epa.gov+1
Vacuum regularly, especially around beds, wardrobes and sofas.
Store rarely used clothing or textiles in sealed containers.

Final Thoughts: Preparation = Peace of Mind

Preparing for insect heat treatment can feel like a lot of work – but you’re not just “getting ready for the pest controller”. You’re investing a few focused hours now to:

Give heat the best chance of reaching every last insect
Protect your valuables and keep your family safe
Avoid the hassle and cost of repeat treatments

By following the steps above, and using the detailed guidance from providers like MothKill’s “Preparing for Insect Heat Treatment” and their Bed Bugs Heat Treatment page, you’ll go into treatment day confident, organised and ready to say goodbye to unwanted guests. Mothkill+1

If you’re unsure about anything in your own home – a specific item, room layout or type of insect – the safest next step is simple: ask your heat treatment provider directly. They work with these situations every day and can give tailored advice in a few minutes.

Sleep easier: prepare well, trust the process, and let the heat do the hard work.