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

Mastic sealing for building owners and managing agents in Preston, Scottish Borders

Sealant work in Preston for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.

  • A mix of products and colours from past repairs
  • Worn sealant at communal door frames
  • Mastic failing across several blocks on an estate
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
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
£5m public liability

Mastic sealing near Preston

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How we handle mastic sealing in Preston

For over 20 years we have resealed joints for owners, agents and landlords. Our applicators are CSCS-carded, and the work is backed by public liability insurance. Resealed mastic joints in Preston carry our 12-month guarantee. We work on balcony and threshold joints, communal entrances and stairwells and external wall and movement joints, and the failures we are asked to look at most are a mix of products and colours from past repairs and worn sealant at communal door frames. Searching for sealant specialists in Preston? We’ve been sealing commercial buildings since 2005.

For buildings around Preston, we group the work to keep travel and visits down. Send addresses and photos for a quote covering the batch.

Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Preston (TD11)
Region
Scottish Borders
Guarantee
12 months on every job
Quotes
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

Keeping the joints sound

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Protect low-level joints in entrances
  • Include mastic in your cyclical inspections
  • Have the asbestos survey to hand for older buildings
  • Share your contractor requirements early

If paintable sealant was used, decoration can follow once it has cured. Non-paintable silicone shouldn’t be painted over.

Mastic fails gradually, then all at once in a wet spell. Resealing when cracking first shows avoids water damage and saves internal repairs.

On site: what to expect

Site rules come first: signing in, inductions and any permit to work. With the paperwork done, we take the joints in the sequence agreed with you, and each area is checked before we leave it. Jobs near Preston are often grouped with others in the same area. Tell us how flexible your dates are.

  1. We inspect each building and record the joints that have failed.
  2. You get a fixed quote, per block or for the whole programme.
  3. We agree the programme and dates with you.
  4. Old mastic is removed and the joint faces prepared.
  5. New sealant goes in with backing rod and primer where needed.
  6. We check the finished work and confirm the guarantee.

Getting the site ready

  • Tell us which areas need to stay in use
  • Send asbestos survey details if the building is pre-2000
  • Let us know about inductions and permits

Request a quote

A handful of photographs and a postcode is the fastest way to a quote. Send them through the quote form, or ring 01277 525 020 or use the quote form to discuss it first.

Ask for a quote

Advice

Why deal with it now?

Draughts round window perimeters cost occupiers comfort, and they often blame the windows. In many cases, new perimeter sealant deals with it when the frames themselves are sound. Exposed buildings in Scotland take a lot of weather, so it’s worth renewing joints around Preston before they leak.

The specified product makes a difference, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Why clients in Preston choose us

  • Over 20 years of commercial sealing
  • Failed material removed, not covered up
  • CHAS accredited
  • Fully insured, including public liability cover

See how commercial sealant jobs are priced and our accreditations.

Your questions answered

Will you price a mastic programme across our Preston portfolio?

Yes. Portfolio-wide programmes are a regular request. Residents are given notice through you, and the work moves building by building.

Is Preston off your patch?

No. Small places get the same service as large ones. Our area covers all of Scotland, cities, towns and islands alike. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Do you check for asbestos in old sealant?

Some mastics in pre-2000 buildings contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.

Who decides which product is used?

The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

Do you seal on top of existing sealant?

No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.

What guarantee do you give on resealing?

A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.

Can you work to our specification?

Yes. Include it with the drawings when you ask for a quote, and we will price the work to it.

What we can’t put right

We check first that sealant really is the fix. It won’t put right:

  • Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
  • Leaks through the frame itself rather than the perimeter
  • Asbestos-containing sealant, which we don’t remove

If you’re not sure, just give us a call on 01277 525 020 or email the details over and we’ll give you a straight answer before you book.

Where we work in Preston

  • Window and door perimeters on blocks
  • Balcony and threshold joints
  • Communal entrances and stairwells
  • Communal kitchens and washrooms
  • Shopfronts below residential blocks
  • External wall and movement joints

Blocks and managed buildings in Preston

Preston is in the east of Scotland, which is drier than the west. Outside mastic still waits for dry, frost-clear conditions. We plan block programmes with some give for it

Trustees of buildings like Preston Church can bring frame and external mastic into a planned maintenance list.

Preston is in the Scottish Borders. Our applicators travel to Preston for work on mastic joints. Across the Scottish Borders, 91 places are covered, Preston among them. For work in that direction, see our Edinburgh page.

Commercial sites across TD11 are covered. Just outside Preston, we also work in Duns (2 miles south), Clockmill (3 miles south-west), Gavinton (3 miles south-west), Chirnside (5 miles east) and Grantshouse (5 miles north).

What’s near Preston

Well-known places in the area include Knoll Hospital (2.5 miles south) and Cockburn Tower (1.7 miles north-west). The countryside around Preston includes Duns Castle nature reserve and Duns Law.

Map of Preston © OpenStreetMap contributors

What sets the cost

Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:

  • Any access equipment needed
  • The size and state of each joint
  • The site’s rules and procedures
  • Removal of failed or old sealant

The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.

Before you send an enquiry

We can often quote from photographs and a few details. It helps to include:

  • Drawings or a marked-up plan, if available
  • A wide shot and a close-up of the area
  • Where the site is, with the postcode
  • Access details, including height

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.

Do you need mastic sealing in Preston?

Many failed joints were sealed without backing rod, so the mastic is glued to the joint bottom too. That three-sided adhesion stops it stretching and splits as the building moves.

Most enquiries start with something like this:

  • Draught complaints from residents or tenants
  • Communal area joints that look neglected
  • A mix of products and colours from past repairs
  • Leaks at window and door perimeters

For owners of several units at places like Duns Industrial Estate (2.7 miles south of Preston), one programme can deal with frame and external mastic across the lot.

Comparing quotes

  • Do they follow the manufacturer’s priming guidance?
  • What site paperwork they can supply
  • Can the work be phased to keep areas open?
  • Whether their applicators hold CSCS cards

How to choose a sealant contractor

Accreditations

Trusted. Accredited. Insured.