The Mastic Doctor team standing beside their branded vans outside an office building
Midlothian · Scotland

Fire-rated sealing and fire stopping in Lasswade, Midlothian

Fire-rated and intumescent sealing of service penetrations and linear gaps in Lasswade and across Midlothian. CHAS accredited and fully insured, with a 12-month guarantee.

  • Fire-rated sealant that has cracked or shrunk back
  • Non-fire-rated filler around services
  • Unsealed openings around new pipes and cables
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Fire stopping for businesses in Lasswade

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

How we handle fire stopping in Lasswade

No fire sealant works on its own: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. We match each opening to that detail before any sealant goes in, and raise it with you if it falls outside. We work on joints between fire-resisting walls and floors, linear gaps at wall heads and small duct penetrations where the tested detail allows, and the failures we’re asked to look at most are damaged fire seals in risers and voids and snag lists that include open service penetrations. Most enquiries from Lasswade start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

In smaller Scottish places like Lasswade, buildings with fire-resisting walls typically include schools, care homes, hotels and health centres. Those penetrations are closed with the product the specification names, built up as tested.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Lasswade (EH19, EH18)
Wider area
Midlothian
Cover
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Page updated
3 November 2026

Should maintenance staff do it?

Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

Diagnose, treat, sign off

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. Where we can, we combine work around Lasswade with other jobs nearby. Tell us how flexible your dates are.

  1. The specification and schedule come first, so we know which details apply.
  2. Access, permits and the order of areas are agreed with the site team.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Foam, ordinary sealant and debris come out first.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. Anything outside the detail is reported to you rather than sealed.

Getting the site ready

  • Let building users know which areas are affected
  • For older buildings, check the asbestos register before work
  • Share your working hours and any access restrictions

Getting a fixed quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to speak to us on 01277 525 020 or email drawings and photos.

Get a price

Advice

Keeping the joints sound

Regular inspection catches problems early. Specifically:

  • Put resealing into every M&E and fit-out package
  • Check with the data sheet before painting over fire sealant
  • Get seals inspected before ceilings and boxing close
  • Ask the designer to confirm details early on refits

Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. Then the seal goes in while the area is open, not months later.

Questions we are asked in Lasswade

Is a smaller place like Lasswade outside your area?

No. Small places get the same service as large ones. We cover the whole of Scotland. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Can you seal penetrations in a hotel in Lasswade after a refit?

Yes, where the specification calls for fire-rated sealant. We match the product to the wall or floor and the services, and say if something other than sealant is needed.

Does the weather affect the work?

Outside, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.

How long does a typical visit take?

That varies with the scale of the job, but the work normally takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence. Larger or phased jobs take longer, and we will give you a timescale with the quote.

How long before the joints can be used?

Curing time varies by product, and we confirm it on the day.

Can you work while the building is occupied?

In the majority of cases, yes. Phased work can be planned so areas stay in use, with each area protected and signed.

Will you quote for a small job?

Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.

Compartments and services around Lasswade

A 2-mile radius around Lasswade takes in a number of hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail. Under the Scottish non-domestic Technical Handbook, clause 2.1.14, penetrations should be fire stopped to at least the wall or floor’s fire resistance duration, with products tested for that end use. We install what’s specified, to the product’s tested detail.

Shop fits in centres such as Straiton Retail Park (to the west of Lasswade) can bring new services through fire-resisting walls between units, which then need the specified seal. Large healthcare estates like Midlothian Community Hospital, 1 mile to the east of Lasswade, change their services often, so penetration seals are worth checking after M&E work.

Lasswade is about 1 mile north-west of Bonnyrigg, in Midlothian. Across the EH19 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. 34 places across Midlothian fall within our area, including Lasswade.

Business premises anywhere in EH19 and EH18 are within our area. Among the streets we cover are Green Lane, Church Road and Polton Road. Being close to the A768, Lasswade is easy to get to with materials and equipment. If your building is just outside Lasswade, we cover Bonnyrigg (1 mile south-east), Polton (1 mile south-west), Loanhead (2 miles west), Burdiehouse (2 miles north-west) and Rosewell (2 miles south). Further afield, our area takes in Penicuik (5 miles south-west), Gorebridge (4 miles south-east), Mayfield (3 miles east), Shawfair (3 miles north), Roslin (3 miles south-west) and Easthouses (3 miles east).

Near you in Lasswade

Around Lasswade, our work takes us to commercial buildings near Public Library and Drum Park, among other places. The closest station to Lasswade is Eskbank station, about 1.3 miles east of the centre. Well-known places in the area include Cameron Toll Shopping Centre (3.5 miles north-west) and Midlothian Community Hospital (1.1 miles east). For a walk, there’s Blackford Hill and Duddingston Loch.

Map of Lasswade © OpenStreetMap contributors

What happens if it’s left?

An improvised seal can look finished while offering no tested performance. The fix is to remove it and reinstall to the detail, and doing it once, properly, is cheaper. Around smaller places like Lasswade, halls, stores and seasonal buildings may not be checked often, giving water time to get in. Early resealing prevents it.

We don’t publish prices, since every building and every scope is different. Call for a quote and we will price your job on its own details.

Why appoint us

  • One contact handling all your sites
  • Failed material removed, not covered up
  • CHAS accredited
  • Constructionline member for supplier checks

See how commercial sealant jobs are priced or how we’re accredited.

When to call us in Lasswade

Openings in fire-resisting walls usually appear when services are added or changed. A new cable pulled by an electrician, a pipe rerouted by a plumber or a data run drilled through a riser leaves an opening that nobody returns to. Across several fit-outs, the openings add up.

Typical triggers for a call:

  • Fire seals cut back for extra cables and never reinstated
  • Fire sealant pulled out of the opening
  • Builders’ foam or ordinary silicone in compartment walls
  • Service penetrations left open after M&E works

At a university such as University of Edinburgh Bioquarter, 2.6 miles north of Lasswade, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work.

Before you book anyone

  • Will RAMS and insurance details be available?
  • Who will actually carry out the work
  • Can the work be phased to keep areas open?
  • Their public liability cover

Our contractor checklist

How the job changes by surface

Cables and cable bundles

Data cabling added after handover is a regular cause of open service penetrations. We reseal around them to the specified detail.

Plastic pipes

Plastic pipes soften and collapse in a fire. Small sizes are sometimes covered by an intumescent sealant detail, though larger ones usually call for a collar or wrap. We check the pipe material and diameter against the detail before we start.

Accreditations

Trusted. Accredited. Insured.