Intumescent strips and smoke seals in Lancashire: what's involved
For intumescent strips and smoke seals anywhere in Lancashire, one team handles the survey, supply, installation and handover, covering Preston, Burnley, Blackburn and the rest of the county.
Seal replacement in Lancashire can be combined with any other remedials on the same inspection report. We check that each door in your Lancashire building closes and latches against its new seals before signing it off.
Lancashire has a mix of buildings, from purpose-built blocks to converted houses and commercial premises. We tailor the programme to the building, not the other way round.
Why seals fail
Seals are the most common defect on fire door inspections. They get painted over, pulled out, damaged by cleaning or simply worn by years of use. A painted brush seal no longer seals, and a strip of the wrong size may not close the gap in a fire. Our guide to seals explains the different types.
Fire door law for Lancashire properties
The rules that apply to fire doors in Lancashire are England's. The responsible person under the Regulatory Reform (Fire Safety) Order 2005 must keep fire doors in non-domestic premises and the common parts of flats in working order; the Fire Safety Act 2021 confirmed that this includes flat entrance doors onto common parts.
Where a Lancashire block is above 11 metres, regulation 10 of the 2022 regulations means communal doors are checked every three months and flat entrance doors annually on a best-endeavours basis. Replacement doors must also satisfy the Building Regulations, with Approved Document B as the guidance most building control bodies work from.
The steps on a Lancashire installation
- Identify door certification and seal specification
- Remove failed seals and clean the grooves
- Fit new strips and seals to the specified positions
- Fit missing pads and lock linings
- Check the door closes and latches against the new seals
- Record the products fitted
Budgeting for intumescent strips and smoke seals in Lancashire
Budget around £45–£110 per door to supply and fit strips and seals, ex VAT for intumescent strips and smoke seals. Our guide prices are the same in Lancashire as elsewhere; what changes the cost is the doors themselves. Use our guide-price tool for a quick estimate.
Common questions
Do you provide intumescent strips and smoke seals across Lancashire?
Yes. We cover all of Lancashire, including Preston and Burnley. Surveys and written quotes are free.
Do all fire doors need smoke seals?
Only where the door is specified for smoke control, such as FD30S doors. Many doors on escape routes and flat entrances are specified this way.
Can smoke seals be painted?
No. Paint stops brush and blade seals working. If seals have been painted, they should be replaced.

