Perth and Kinross · Scotland
External Mastic in Gellyburn
Problem with your movement joints in Gellyburn? We cut out the old, prepare the joints and apply the right sealant.
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Gellyburn
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We take the old material out and do it properly. Common call-outs are for water getting into walls through failed joints and movement joints with cracked, split or missing sealant, across joints between brick and frames, render & cladding joints and façade panels.
External sealant needs dry surfaces, so outdoor work around Gellyburn is planned around the weather. Let us know about access to every wall and roofline.
A one-year guarantee comes as standard, so you’re covered after we have gone.
- Location
- Gellyburn (PH1)
- Wider area
- Perth and Kinross
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How it works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. Outside jobs in Gellyburn need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Tell us if parking is tricky
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, drop us a line at info@mrmastic.co.uk.
Related advice
Questions from Gellyburn
Will you come out to Gellyburn?
Yes, Gellyburn is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Gellyburn for external mastic?
Yes, Gellyburn is within the area we cover. We work across all of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can landlords and businesses book you?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
Landlords, agents and businesses in Gellyburn
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
External mastic in Gellyburn: local notes
Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For an older house near a landmark such as Caputh Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Gellyburn is about 6 miles south-west of Blairgowrie and Rattray, in Perth and Kinross. Whether you’re in the middle of Gellyburn or further out, external mastic is available for homes and businesses alike. We cover 107 towns and villages across Perth and Kinross. We also work in Dundee, about 19 miles from Gellyburn.
All of PH1 is within our area for external mastic. Close by, we work in Murthly (1 mile south-east), Caputh (1 mile north-west), Middleton (1 mile north-west), Spittalfield (1 mile north-east) and Bankfoot (3 miles south-west). Within a short drive, we also cover Perth (9 miles south), Blairgowrie and Rattray (6 miles north-east), Letham (9 miles south), Scone (8 miles south), Pitlochry (15 miles north-west) and Tulloch (8 miles south).
Landmarks near Gellyburn
Gellyburn’s nearest station is Dunkeld & Birnam station, roughly 4.3 miles west. A little further out are Blairgowrie Community Hospital (5.9 miles north-east) and Murthly Castle (1.6 miles west). Not far away are Lily Loch and Birnam Hill.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- Access and height
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What to tell us for a quote
When you contact us, it’s useful to know:
- The address or postcode of the job
- What’s wrong with the joints now
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
Want a quote for external mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Nearby places to Gellyburn
Also in Gellyburn
Common problems we fix in Gellyburn
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint can’t move, so the wall cracks somewhere else instead.
Keep an eye out for these signs:
- Joints pointed up with cement by mistake
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Sealant pulling away from one side of the joint
For landlords with property near Dunkeld & Birnam station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- What guarantee comes with the work
- What happens if the job turns out different
- How the colour is chosen
- Whether all the old sealant comes out first
Aftercare tips
A little care helps the new joints last. We recommend:
- Check the sealant is paintable before painting near it
- Keep water from gutters off the wall
- Point out the joints to other trades
- Avoid pressure-washing directly into sealant joints
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
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.
What happens if it’s left?
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
What you pay reflects the work, not guesswork. That is why we ask about the job first and send you a clear quote before we start.
Why Gellyburn clients choose us
- We never seal over old sealant
- Arbo and Everbuild products
- White, clear, grey or coloured to suit, where the product allows
- Approved under the ARBOMaster scheme
See our cost guide or customer reviews.