County Londonderry · BT48

Intumescent & Smoke Seal Replacement in Derry

Intumescent & Smoke Seal Replacement in Derry, County Londonderry: every door logged, photographed and graded, with a clear price for anything that needs putting right.

Intumescent seals are strips set into the edge of a fire door or its frame that expand when heated to close the gap around the door. Smoke seals, usually brush or fin seals, block cold smoke before the intumescent reacts. Both are part of the door's tested performance.

Town: Derry
County / area: County Londonderry
Local authority: Derry
Postcode district: BT48
Region: Northern Ireland
Population: Around 84,000 people
Fire safety law: NI: Fire and Rescue Services (NI) Order 2006
Nearest town: Londonderry County Borough

Typical Derry fire door jobs

With a large student population, Derry has plenty of HMOs and halls, where wedged doors and disconnected closers are common problems. Derry jobs start with a short call to agree access, followed by a fixed price in writing.

What our fire door seal replacement covers in Derry

Old seals removed cleanly from the groove
Seals on hanging, closing and head edges, and meeting stiles on pairs
Gap readings checked so new seals can work
Threshold or drop-down seals where smoke control is required
Intumescent-only or combined intumescent and smoke seals as required

Type	Intumescent only or combined with a smoke seal, to suit the door's rating.
Continuity	No breaks, overlaps or missing lengths.
Paint	Smoke seals free of paint so they can work.

Full details on our intumescent & smoke seal replacement page.

What to expect in Derry

Same report everywhere

Whether your building is in Derry or across the country, the report format, defect grading and pricing are the same.

One contact

One point of contact for inspections, repairs and replacements across Derry and County Londonderry.

Priced door by door

Every failed item in Derry is priced separately, so you approve exactly what you want done.

Which fire door rules apply in Derry?

Derry is in Northern Ireland, where the Fire and Rescue Services (NI) Order 2006 and the Fire Safety Regulations (NI) 2010 require fire safety measures, including fire doors, to be maintained.

Derry guide prices

In Derry, fire door seal replacements typically cost £45–£110 per door ex VAT, with visits from £145. Get a guide price for your Derry building.

Intumescent & Smoke Seal Replacement in Derry: questions

Can I just stick new seals over the old ones?

No. Seals should be fitted into the groove after the old seal is removed, in the size and type the door was tested with.

Can intumescent strips be painted?

Brush and fin smoke seals should never be painted, because paint stops them working. Some intumescent strips tolerate a light coat, but the safest rule is to mask all seals before decorating and replace any that have been painted.

Can you price remedial work in Derry from another company's report?

Yes. Send the report and we will price each line for your building in Derry, or revisit specific doors if the report lacks detail.

Does regulation 10 apply in Derry?

No. Derry is in Northern Ireland, where the Fire and Rescue Services (Northern Ireland) Order 2006 and the Fire Safety Regulations (Northern Ireland) 2010 apply.