East Lothian · Scotland
External Mastic in Humbie
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Humbie. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
- Joints pointed up with cement by mistake
What we do, step by step
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Somewhere like Humbie may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs 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
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
- Tell us if parking is tricky
How to get a quote
If you are in Humbie and need external mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Related advice
About our external mastic in Humbie
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. Common call-outs are for brick movement joints where the sealant has split and sealant that has lost its bond to the brick or render, across copings & trims, brickwork movement joints and joints between brick and frames.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. Newer houses need their movement joints and roofline trims kept sound.
All of our work is guaranteed for twelve months, in Humbie and everywhere else we cover.
- Location
- Humbie (EH36)
- Wider area
- East Lothian
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Common questions in Humbie
Is external mastic in Humbie guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Do you cover smaller places like Humbie?
Yes, Humbie is covered. Our work covers the whole of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then email us at info@mrmastic.co.uk.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
Can a movement joint be filled with mortar?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
External mastic in Humbie: local notes
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
If you live in an older home near Humbie Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Humbie is about 8 miles south-west of Haddington, in East Lothian. Whether you are in the middle of Humbie or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Humbie is one of 48 places in East Lothian we cover for external mastic. We also work in Edinburgh, about 15 miles from Humbie.
Work in EH36 is quoted and booked the same way as anywhere else. That includes homes and businesses on Shillinghill and Kippithill and the roads around them. Nearby, we also carry out external mastic in East Saltoun (3 miles north), Wester Pencaitland (4 miles north), Easter Pencaitland (4 miles north), Pencaitland (4 miles north) and Pathhead (4 miles west). Within a short drive, we also cover Musselburgh (10 miles north-west), Haddington (8 miles north-east), Tranent (7 miles north-west), North Berwick (15 miles north), Prestonpans (8 miles north-west) and Cockenzie and Port Seton (9 miles north-west).
Near you in Humbie
A little further out are East Saltoun Old Castle (3.4 miles north). For a walk, there’s Soutra Hill.
Nearby places to Humbie
Other services in Humbie
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. 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.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. Several sites can go on one quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
When it is not the sealant
Before you book, it’s worth knowing the limits too:
- Render that’s blown, hollow or coming away
- Damp that isn’t coming from the joint
- Cracking across the wall rather than at a joint
If in doubt, email us at info@mrmastic.co.uk and we will say what we think.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
Surface by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Send us any details you have about the façade.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so neither cracks the other.
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Why choose Mr Mastic in Humbie
- Full insurance on every job
- White, clear, grey or coloured to suit, where the product allows
- Approved under the ARBOMaster scheme
- You choose the colour before work begins
Signs you need external mastic in Humbie
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
These are the problems we are asked about most:
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Cracked joints where brick meets render or frames
In and around Humbie, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- Is VAT in the price?
- Is the old sealant removed completely?
- Whether they’re fully insured
- Which colour the sealant will be