Orkney Islands · Scotland
External Mastic in Grimeston
Our applicators work in Grimeston on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Rain getting behind render or cladding at a joint
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
How it works
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. Around Grimeston, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Try not to wet indoor joints just before the visit
How to get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To get started, drop us a line at info@mrmastic.co.uk.
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External mastic for homes and businesses in Grimeston
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two. Typical jobs include failed sealant between panels on a façade and weathered mastic that no longer stretches, on copings & trims, façade panels and render & cladding joints.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Outside joints on exposed walls work hard, so they need a sealant that moves with the building.
There’s a 12-month guarantee on every job, large or small.
- Where
- Grimeston (KW17)
- Region
- Orkney Islands
- Guarantee
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
A careful DIYer can reseal a simple joint, 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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Why act early in Grimeston
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why book with us
- We leave the area clean and tidy
- Arbo and Everbuild products
- Anti-fungal sanitary silicone in wet areas
- 12-month guarantee on every job
Take a look at our cost guide or our reviews.
What external mastic looks like in Grimeston
Grimeston is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Island jobs need planning around ferries and the weather, so the more notice, the better.
For jobs in and around Grimeston, choosing the right material for each joint is as important as a tidy finish.
Grimeston is about 9 miles west of Kirkwall, in the Orkney Islands. Whether you are in the middle of Grimeston or further out, we cover external mastic for every kind of property. Our the Orkney Islands coverage runs to 51 places, Grimeston among them.
Postcode districts we cover here for external mastic: KW17. Other places close to Grimeston include Bimbister (1 mile north-east), Harray (2 miles north), Stenness (2 miles south), Wasbister (2 miles west) and Russland (2 miles north). If you are somewhere remote, a little more planning is needed.
Landmarks near Grimeston
Nearby you’ll also find Corrigall Farm Museum (3 miles north). Not far away are Hill of Heddle and Loch of Harray.
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
How we quote for external mastic
Call for a quick quote. The main things that affect it are:
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- The product the joint needs
- How many areas need sealing
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
What we need to know
Photos help, but a description is a good start. Please mention:
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- Photos by email, if that is easy
For a quote, send an email to info@mrmastic.co.uk with the location and a short description of the problem. We will give you a clear price before any work starts.
Also in Grimeston
For landlords and businesses
If you manage several properties in or around Grimeston, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Common problems we fix in Grimeston
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Most people get in touch after spotting one of these:
- Hard, crazed mastic that has stopped moving
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
- Sealant that has lost its bond to the brick or render
Around Grimeston, as everywhere, external mastic is only as good as the preparation behind it.
What your quote should include
- What guarantee comes with the work
- How the joint is cleaned and prepared
- How the colour is chosen
- What happens if they find a problem under the old sealant
Grimeston questions
Can you do external mastic in Grimeston?
Yes. We work across all of Scotland, and Grimeston is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll give you a clear quote.
Is Grimeston within the area you cover?
Yes, we do. Our work covers the whole of Scotland, islands included, from towns to the smallest places. Longer journeys are simply planned in advance.
Can landlords and businesses book you?
Yes. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
How much does external mastic cost in Grimeston?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Are you insured?
Yes. We are fully insured.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Can you reach joints on upper floors?
It depends on the building. Tell us the height, the number of joints and what’s below them, and we’ll confirm what access is needed.