Hertfordshire · England
External & façade joints in Buntingford, Hertfordshire
Our applicators work in Buntingford on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Panel joints letting water in
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
External mastic for homes and businesses in Buntingford
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. Typical jobs include brick movement joints where the sealant has split and plants rooting in failed movement joints, on copings & trims, joints between brick and frames and façade panels.
Around Buntingford, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks normally start at a gutter end, a garage door frame or where an extension meets the house.
Big or small, you get the same 12-month guarantee in Buntingford and across Hertfordshire.
- Location
- Buntingford (SG9)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Buntingford
If you manage several properties in or around Buntingford, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Buntingford questions
Is external mastic in Buntingford guaranteed?
All our work, in Buntingford and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Buntingford within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Are you insured?
Yes, we’re fully insured for domestic and commercial work.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it doesn’t stand out.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What we are called out for in Buntingford
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Any of these means the joints need attention:
- Joints where the bead has come unstuck
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
- Rigid filler in a joint that should flex
If you live in an older home near Church of St Peter, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before you book
- How the joint is cleaned and prepared
- What insurance they hold
- When the joint can take water or movement
- What the quote includes, VAT included or not
Other services in Buntingford
Walls and rooflines in Buntingford
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Millfield First and Nursery School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Buntingford is in Hertfordshire. Homes, rented property, offices and hotels in Buntingford is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Buntingford is one of 381 towns and villages in Hertfordshire we cover. You can also see our page for Chelmsford, roughly 26 miles from Buntingford.
Postcode districts we cover here for external mastic: SG9. Whether your property is on Market Hill, Station Road and High Street or a nearby road, we can help. Being close to the B1038, Buntingford is simple for us to get to. We also cover Layston (1 mile north-east), Aspenden (1 mile south), Westmill (1 mile south), Wyddial (1 mile north-east) and Chipping (2 miles north-west). Within a short drive, we also cover Stevenage (7 miles west), Bishop's Stortford (9 miles south-east), Welwyn Garden City (13 miles south-west), Hitchin (11 miles west), Hoddesdon (13 miles south) and Hertford (11 miles south).
Local landmarks in Buntingford
Locally, jobs take us to homes and businesses close to Freman College and The Jolly Sailors pub, among other places. Other landmarks nearby include Anstey Hales Farm (3.7 miles north-east). For a walk, there’s Hawkins Wood.
What we can’t put right
We’d rather tell you now than do work that will not last, so these are the limits:
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
- Cracking across the wall rather than at a joint
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Buntingford
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
How it works
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. A visit to Buntingford is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Wash walls gently around the sealant
- Never let anyone fill a movement joint with mortar
- Do not let climbing plants root in the sealant
- Ask before painting over external sealant
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Why act early in Buntingford
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Homes in smaller places like Buntingford can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Doing several joints on one visit is usually more efficient than separate visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Buntingford
- Trusted Arbo and Everbuild sealants
- Rated 4.9 stars on Google
- Sealant colour chosen to suit
- Tidy, careful work