County Londonderry · BT48

Intumescent & Smoke Seal Replacement in Londonderry County Borough

Need a fire door seal replacement in Londonderry County Borough? Tell us the building and roughly how many doors, and we will confirm a fixed price before booking.

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. We use the same method for buildings in Londonderry County Borough.

Town: Londonderry County Borough
County / area: County Londonderry
Local authority: Derry
Postcode district: BT48
Region: Northern Ireland
Population: Around 87,000 people
Fire safety law: NI: Fire and Rescue Services (NI) Order 2006
Nearest town: Derry

What kind of buildings in Londonderry County Borough need fire door work?

Care homes, schools and small residential blocks are typical Londonderry County Borough buildings with fire doors to look after. Reports for Londonderry County Borough buildings keep the same door references from one visit to the next.

What's included in Londonderry County Borough?

Seals on hanging, closing and head edges, and meeting stiles on pairs
Threshold or drop-down seals where smoke control is required
Gap readings checked so new seals can work
Survey of the seal type, size and position for each door
Old seals removed cleanly from the groove

Size	Width and position match the door's evidence and gap.
Paint	Smoke seals free of paint so they can work.
Type	Intumescent only or combined with a smoke seal, to suit the door's rating.

Full details on our intumescent & smoke seal replacement page.

Why Londonderry County Borough clients choose us

Photos of every defect

You get photographs of every defect found in Londonderry County Borough, linked to a door reference you can find again.

Same report everywhere

Whether your building is in Londonderry County Borough 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 Londonderry County Borough and County Londonderry.

Northern Ireland fire safety law in Londonderry County Borough

Northern Irish law applies in Londonderry County Borough: the Fire and Rescue Services (NI) Order 2006 and 2010 regulations. Regulation 10 is English law, but regular documented checks support your fire risk assessment.

Londonderry County Borough guide prices

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

Londonderry County Borough FAQs

Will new seals fix a door with big gaps?

No. Seals only work within the gap they were tested with. Gaps outside tolerance need the door adjusting first.

Which fire safety law applies in Londonderry County Borough?

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

Do you work in occupied buildings in Londonderry County Borough?

Yes. Inspections and repairs in Londonderry County Borough can be carried out in occupied flats, schools, care homes and workplaces, with doors kept closable at all times.

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.