Na h-Eileanan Siar · Scotland
External Mastic in North Tolsta
Sealing brickwork movement joints, render, cladding and façade joints in North Tolsta, with a 12-month guarantee on every job. Call for a quick quote.
- Water getting into walls through failed joints
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
North Tolsta buildings and the weather
North Tolsta is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. On the islands, wind and salt spray are hard on outside sealant.
For jobs in and around North Tolsta, choosing the right material for each joint is as important as a tidy finish.
North Tolsta is about 11 miles north-east of Stornoway, in Na h-Eileanan Siar. Jobs in North Tolsta get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. North Tolsta is one of 87 places in Na h-Eileanan Siar where we work for external mastic.
Jobs for external mastic in HS2 is quoted and booked the same way as anywhere else. That includes homes and businesses on School Road, New Street and Hill Street and the roads around them. Other places close to North Tolsta include Tolastadh bho Thuath (1 mile south), Back (5 miles south-west), Bac (6 miles south-west), Port Mholair (7 miles south) and Portvoller (7 miles south). Island and remote addresses take a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Landmarks near North Tolsta
Open spaces near North Tolsta include Muirneag and Loch Langavat.
External mastic in North Tolsta, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render. If you are dealing with plants rooting in failed movement joints and rigid filler in a joint that should flex, we can put it right.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. Newer houses need their movement joints and roofline trims kept sound.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Where
- North Tolsta (HS2)
- Wider area
- Na h-Eileanan Siar
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How the job changes by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. In an older home around North Tolsta, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
Combining jobs into one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why us?
- Homes, businesses and hotels
- Neat joints and a tidy finish
- A choice of colours where the product allows
- Colour picked to suit the job
See what affects the cost or our reviews.
Common problems we fix in North Tolsta
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and rips as the joint opens.
Keep an eye out for these signs:
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Sealant that has lost its bond to the brick or render
Around North Tolsta, as everywhere, external mastic is only as good as the preparation behind it.
What to look for in a quote
- Whether VAT is included
- What insurance they hold
- What preparation is included
- Whether the sealant suits the joint
Nearby places to North Tolsta
More services for North Tolsta
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Landlords, agents and businesses in North Tolsta
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
North Tolsta questions
Is North Tolsta in your area for external mastic?
Yes. Our work covers the whole of Scotland, and North Tolsta is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will send you a clear quote.
Do you cover smaller places like North Tolsta?
Yes, smaller places are covered as well as towns. We work across all of Scotland, including the islands, where work is planned around ferry crossings. Let us know about access, parking and anything unusual about getting there when you book.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. We’ll reseal it with a flexible sealant.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses.
How long does external mastic take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. Your quote will say how long we expect yours to take.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Have failed joints looked at early
- Don’t let climbing plants root in the sealant
- Check external joints each spring
- Show decorators and builders where the movement joints are
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. Outdoor work around North Tolsta depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Work indoors isn’t affected.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.