The Mastic Doctor team standing beside their branded vans outside an office building
Na h-Eileanan Siar · Scotland

Mastic sealing for building owners and managing agents in North Lochs, Na h-Eileanan Siar

Mastic sealing for building owners, managing agents and housing associations in North Lochs. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Old repairs sealed over failed mastic
  • Open joints in brickwork or panels
  • Water getting in round frames after rain
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Mastic sealing near North Lochs

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

When to call us in North Lochs

In communal areas, joints take knocks from bins, bikes, buggies and deliveries, and low-level joints get damaged. Cleaning products add to the wear.

Typical triggers for a call:

  • Cracked, hardened mastic round windows on a block
  • Movement joints with sealant missing
  • Repeated reactive repairs to the same buildings
  • Worn sealant at communal door frames

Around North Lochs, a planned programme renews failed mastic across a building or estate in one go.

Comparing quotes

  • What level of public liability insurance do they hold?
  • How the joint faces will be prepared and primed
  • How they’ll work around occupants
  • How they handle RAMS and site documents

Our contractor checklist

Mastic sealing in North Lochs

We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in and backing rod used wherever a joint is deep. Site teams most often ask us about no planned programme for sealant and the same joint failures repeated across a portfolio, on balcony and threshold joints, shopfronts below residential blocks and window and door perimeters on blocks. A specialist sealant contractor works differently from a general builder: on jobs in North Lochs, preparation and product choice get the time they need.

Around North Lochs, outside mastic waits for dry weather and the right temperature. Programmes allow for the weather.

A 12-month guarantee applies to all our work. If an installation problem shows up, call 01277 525 020 or email a schedule or drawings and we’ll arrange a return visit.

Place
North Lochs (HS2)
Region
Na h-Eileanan Siar
Guarantee
A 12-month guarantee
Quote
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Questions about North Lochs

Can being near the sea in North Lochs affect the sealant we need?

It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.

Can you quote for mastic across several buildings in and around North Lochs?

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

How soon can the area be used again?

We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

How many days will you need on site?

That varies with the scale of the job, but the work usually takes anything from a day to a few weeks, depending on the number of buildings and joints. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.

What if the old mastic contains asbestos?

Some mastics in pre-2000 buildings contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.

What paperwork can you provide?

Our credentials include CHAS, Constructionline and public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.

Will you just go over the old sealant?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

From enquiry to sign-off

At the end of each section, the masking comes off, the area is cleaned and every joint is checked with your site contact. If an area should be left alone while the sealant cures, we say how long and put signs out. Jobs near North Lochs are often grouped with others in the same area. Let us know if your dates have any give.

  1. We inspect each building and record the joints that have failed.
  2. The quote is fixed and split as suits you.
  3. Dates and areas are agreed so occupiers can be told.
  4. Failed sealant is removed and the faces prepared.
  5. New sealant goes in with backing rod and primer where needed.
  6. Each building is checked and signed off with the 12-month guarantee.

Getting the site ready

  • Tell us what induction or permit system the site runs
  • Send any specification or drawings in advance
  • Point out any areas we must not close

Getting a fixed quote

Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. For a chat about it beforehand, give us a call on 01277 525 020 or send details through our quote form.

Get a quick quote

Related advice

For owners and agents in North Lochs

North Lochs is within about 1 mile of the coast. Sea-facing elevations take driven rain and salt, and their mastic shows it before the sheltered sides do, so it’s worth inspecting those sides more often. Being in the west of Scotland, North Lochs gets more rain than eastern areas. The most exposed elevations need checking most often. External work is booked for dry spells, with a little give in the dates.

Churches, halls and community buildings such as Parish Church are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.

North Lochs is about 6 miles south-west of Stornoway, in Na h-Eileanan Siar. We cover commercial sites throughout North Lochs, whether it’s a single job or part of a planned programme. 87 places across Na h-Eileanan Siar fall within our area, including North Lochs.

We cover the HS2 postcode districts. We also cover Crosbost (1 mile east), Liurbost (1 mile west), Lacasaidh (4 miles south-west), Marybank (5 miles north) and Stornoway (6 miles north-east) for mastic joints. Remote and island addresses take more planning, from travel and ferries to the weather, so mention the location when you give us a call on 01277 525 020 or send details through our quote form.

Local landmarks in North Lochs

Nearby you’ll also find Western Isles Hospital (6 miles north-east). Not far away are Nisreaval and Loch na Craoibhe.

Map of North Lochs © OpenStreetMap contributors

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.

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

What the job involves on each surface

Estate-wide resealing programmes

Consistent products and colours across an estate make future maintenance simpler.

Communal areas

Communal areas stay in use while we work. We work in sections so access is never blocked.

For managing agents and facilities managers

Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.

Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules.

After the work

Problems stay small when the joints are checked regularly. In particular:

  • Have the asbestos survey to hand for older buildings
  • Mention RAMS, insurance or CSCS requirements up front
  • Log resealing dates block by block
  • Plan resealing building by building rather than complaint by complaint

Log the date and extent of the resealing for each block. It helps plan the next round and shows what was done.

Water getting in round frames can damage plaster, decoration and the frames themselves. Early resealing is far simpler than repairs inside.

Accreditations

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