NACS registered chimney sweep in progress — Allchimney Sweeps, Harold Hill
NACS Registered Since 2011 · Certificate Issued

NACS Registered Chimney Sweeping

Solid fuel, wood burner and open fire. Smoke draw test included. NACS certificate issued on every sweep. Romford, Gidea Park, Hornchurch and surrounding areas.

Chimney sweep brush through chimney pot on residential property — NACS registered chimney sweep, open fire coal and wood, Allchimney Sweeps, Romford

Chimney sweep brush through the pot — open fire burning coal and wood, Romford. NACS registered chimney sweep and flue safety specialists.

What We Do

A Professional Certified Sweep Every Time

Allchimney Sweeps are NACS registered and provide a fully insured and certified chimney sweeping service across Romford, Gidea Park, Hornchurch, Upminster and surrounding areas.

On completion of every sweep we carry out a smoke draw test and issue a NACS Certificate of Chimney Sweeping — required by most home insurers for solid fuel appliances.

  • Solid fuel open fires
  • Wood burning stoves
  • Multi-fuel appliances
  • Gas fuel effect (GFE) appliances
  • Twin wall insulated flue systems
Book a Sweep
NACS Certificate of Chimney Sweeping issued after smoke test on GFE appliance — Allchimney Sweeps, Romford

NACS Certificate of Chimney Sweeping — issued after smoke draw test on GFE appliance, Romford. Certificate produced on every sweep as standard.

How Often

How Often Should You Sweep?

Annual Sweep — Minimum Requirement

Every chimney should be swept at least once a year. Annual sweeping removes soot, debris and blockages, confirms the flue is clear and drawing correctly, and satisfies your home insurance requirements.

Quarterly — Heavy Use

If your stove or open fire is in constant use throughout the winter, quarterly sweeping is recommended. Heavy use means heavy soot buildup — and soot buildup means chimney fire risk.

Burn dry. Sweep annually. Stay safe.

CO Safety Information
Wood burning stove not swept for four years — heavy soot buildup causing bad draw, carbon monoxide risk and chimney fire hazard. Annual chimney sweep essential, NACS registered, Allchimney Sweeps, East London

Soot blocking the firebox after four winters of use — restricted draw, elevated CO risk, East London. Quarterly sweeping recommended for stoves in constant use.

What We Remove

The Reality of an Overdue Sweep

These images are from real jobs. This is what neglect looks like — and why annual sweeping is not optional.

125mm flexible flue liner choked with creosote and tar buildup from burning unseasoned green wood — chimney fire risk, NACS registered sweep, Allchimney Sweeps, Harold Wood

Tar and creosote clogging a 125mm flexible liner — Harold Wood. Only kiln-dried or properly seasoned hardwood should be burned. Look for the Ready to Burn logo.

Creosote & Tar Buildup

Caused by burning unseasoned green wood, Harold Wood. Wood must be dried for a minimum of two years before burning. This level of buildup is a serious chimney fire risk — and it builds silently.

Industrial vacuum full of soot removed from badly maintained solid fuel open fireplace — professional chimney sweep service, NACS registered, Allchimney Sweeps, Hornchurch

Industrial vacuum full of soot from solid fuel open fire — Hornchurch. Annual sweeping prevents this dangerous level of buildup.

Soot Accumulation

A full vacuum of soot from a badly maintained solid fuel open fire, Hornchurch. Annual sweeping removes dangerous buildup before it becomes a CO or chimney fire risk. Clean and tidy NACS registered service.

Smoke test carried out after chimney sweep prior to issuing NACS certificate — annual chimney sweeping service, Allchimney Sweeps, Brentwood

Post-sweep smoke draw test — confirms combustion gases are evacuating correctly before the NACS certificate of chimney sweeping is signed and issued, Brentwood.

Smoke Test — After Every Sweep

Smoke test completed as standard before the NACS certificate is issued — Brentwood. Confirms the flue is drawing correctly. Annual sweep recommended, quarterly for stoves in constant use.

NACS registered chimney sweep in progress — 5 inch brush and flexi rods through 125mm stove liner, professional equipment on dust sheets, Allchimney Sweeps, Harold Hill

Professional chimney sweep in progress — 5 inch brush, flexi rods, industrial vacuum on dust sheets. Every sweep carried out to NACS standard, Harold Hill.

Professional Kit

Clean, Tidy and Fully Equipped

Every sweep is carried out with a full professional kit — 5" brush and flexi rods on 125mm stove liners, industrial vacuum, DeWalt drill and dust sheets laid as standard. Your room is protected before we start and left clean when we leave.

No mess. No shortcuts. NACS registered chimney sweeping carried out the way it should be — professionally, cleanly, with a certificate at the end. Romford, Gidea Park, Hornchurch and the London Borough of Havering.

  • Dust sheets laid before any work begins
  • Industrial vacuum — no soot in the room
  • 5" rods and brushes for all liner sizes
  • NACS certificate issued at the job, not posted later
All Appliance Types

Every Appliance Covered

Cast iron fireplaces. Wood burning stoves with log baskets. Traditional open fires. Twin wall insulated flue systems. Whatever the appliance — we sweep it.

Professional chimney cleaning and wood burner sweep in progress — vacuum hose, sweep rods and Arctic Hayes smoke cartridges, experienced NACS registered sweep, Allchimney Sweeps, Essex

Vacuum hose in firebox, flexi rods and Arctic Hayes smoke cartridges — wood burner sweep in progress, Essex.

Wood Burning Stoves

Vacuum hose fed into firebox, flexi rods and brush through the liner, smoke cartridges ready for the post-sweep draw test. NACS registered chimney sweeping across Essex and Havering.

Smoke test after chimney sweep on twin wall insulated internal flue system — NACS certificate issued on every sweep, professional chimney sweeping service, Allchimney Sweeps, Chadwell Heath

Smoke test on twin wall insulated flue system — NACS certificate issued after every sweep, Chadwell Heath.

Twin Wall Insulated Systems

Smoke test completed after sweeping a twin wall insulated internal chimney system. NACS certificate issued on every sweep. Chimney sweeping across Chadwell Heath, Collier Row and surrounding areas.

Solid fuel open fire burning in ornate fireplace — chimney swept, smoke tested and NACS certificate issued, Allchimney Sweeps, Gidea Park Romford

Solid fuel open fire — ornate fireplace, chimney swept, smoke tested and NACS certificate issued, Gidea Park Romford.

Open Fires & Gas Appliances

Coal, wood or smokeless fuel — the annual sweep requirement is the same. Flue clear, draw confirmed strong, NACS certificate issued. Gas fuel effect (GFE) appliances also covered — chimney sweep and smoke draw test before new gas fire installation or as part of annual gas appliance servicing. Open fires across Gidea Park, Hornchurch, Upminster and Havering.

Smoke Controlled Areas

DEFRA Approved — Havering Compliance

The London Borough of Havering is a smoke controlled area. Only DEFRA-approved appliances burning authorised fuel can be used. Before installing a wood burning stove in Havering, your installation must comply with smoke control area legislation.

A DEFRA approved wood burning stove — such as a Henley double-door — burns cleanly enough to comply with smoke controlled area requirements. Annual chimney sweeping and NACS certification keeps you compliant and your home insurer satisfied.

Book a Sweep
DEFRA approved Henley wood burning stove — chimney sweep and certificate, smoke controlled area, Allchimney Sweeps, Havering

DEFRA approved Henley wood burning stove — compliant for smoke controlled areas across the London Borough of Havering. Chimney swept and NACS certificate issued.

The Short Answer

Frequently Asked Questions

How long does a chimney sweep take?

A standard sweep takes 45–60 minutes. This includes laying dust sheets, sweeping the chimney, carrying out the smoke draw test and issuing the NACS certificate. Allow up to 90 minutes for the first sweep on a stove that has not been swept recently.

Do I need to do anything before you arrive?

Ensure the appliance has been cold for at least 12 hours. Move any ornaments or valuables from the hearth area. We bring everything we need — you do not need to provide anything. We lay dust sheets as standard and leave the room clean.

Is the NACS certificate valid for home insurance?

Yes. The NACS Certificate of Chimney Sweeping is the recognised certificate accepted by home insurers for solid fuel appliances. Most insurers require annual sweeping and will ask for the certificate in the event of a chimney fire claim. We issue one on every sweep.

How often should I sweep my chimney?

Once a year minimum for all solid fuel appliances. Quarterly if your stove or open fire is in constant use throughout the winter months. Gas fuel effect (GFE) appliances should be swept at least once every two years. Twin wall flue systems — annually.

What wood should I burn?

Only seasoned, dried hardwood. Wood must be dried for a minimum of two years before burning. Burning green or unseasoned wood produces excessive tar and creosote buildup in the flue liner — the leading cause of chimney fires. Look for the Ready to Burn logo when buying kiln-dried logs.

What areas do you cover?

Romford, Gidea Park, Hornchurch, Upminster, Emerson Park, Rise Park, Collier Row, Harold Hill, Harold Wood, Brentwood, Chadwell Heath and surrounding areas of Havering and Essex. WhatsApp us a photo and your postcode for a same day response.

DEFRA approved Henley wood burning stove fully loaded — chimney sweep and NACS certificate, smoke controlled area, Allchimney Sweeps, Havering

Book a Chimney Sweep

Certificate issued. Same day response. WhatsApp a photo for an instant assessment.

Nearby Areas

Also Serving Your Neighbours

Our Services

Everything We Cover