Hertfordshire · England
External & façade joints in The Willows, Hertfordshire
Our applicators work in The Willows on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Panel joints letting water in
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
About our external mastic in The Willows
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. We work on render & cladding joints, concrete & block and joints between brick and frames, and common reasons people get in touch are rain getting behind render or cladding at a joint and brick movement joints where the sealant has split.
Around The Willows, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- The Willows (SG9)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
Call for a quick quote. What matters most is:
- The product the joint needs
- The size of the job
- How many rooms, windows or areas are involved
- Whether old sealant or filler has to be cut out
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Helping us quote
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- Whether it has been sealed before
- What’s wrong with the joints now
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. In a small place like The Willows, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What you get with us
- Every job guaranteed for a year
- 20+ years of sealant experience
- Anti-fungal silicone where joints get wet
- Any old sealant cut out fully, not covered over
Read our cost guide or customer reviews.
What happens on the day
We keep the work tidy and contained to the area we are working on. Expect the work to take a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. Somewhere like The Willows needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
We do not publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or email us.
Read more
The Willows questions
Can you help a landlord with a rental near Stansted Mountfitchet station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Do you cover smaller places like The Willows?
Yes, The Willows is covered. We work across 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 there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
How do I get a quote for external mastic in The Willows?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
When something else is needed
A few problems are outside what sealant work can do:
- Damp that isn’t coming from the joint
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in The Willows
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
External mastic in The Willows: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Furneux Pelham Church of England School, its movement joints, gutters and trims need looking after like any other building’s.
The Willows is about 5 miles north-west of Bishop's Stortford, in Hertfordshire. Homes, rented property, offices and hotels in The Willows can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 381 places across Hertfordshire, large and small. For nearby work, see our Chelmsford page (21 miles or so).
Here we cover the SG9 postcode area for external mastic. That includes homes and businesses on Ginns Road and The Wash. We also cover the places around The Willows: Stocking Pelham (1 mile north-east), Berden (2 miles north-east), Uppend (2 miles south-east), Starling's Green (2 miles north-east) and Mount Pleasant (2 miles south-east). Within a short drive, we also cover Stevenage (12 miles west), Bishop's Stortford (5 miles south-east), Hoddesdon (13 miles south), Hertford (12 miles south-west), Letchworth (14 miles west) and Ware (10 miles south-west).
What’s near The Willows
Typical jobs here are in homes near The Cock pub. The Willows’s nearest station is Stansted Mountfitchet station, about 4.7 miles south-east of the centre. Other landmarks nearby include Brent Pelham (2.2 miles north-west) and Herts and Essex Hospital (5.6 miles south-east). Open spaces near The Willows include Aubrey Buxton Nature Reserve.
Also near The Willows
Other services in The Willows
How the job changes by surface
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Send us any details you have about the façade.
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Do you need external mastic in The Willows?
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Keep an eye out for any of the following:
- Movement joints filled with mortar instead of sealant
- Plants rooting in failed movement joints
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
Rented homes near Stansted Mountfitchet station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- How long the guarantee is
- How long to leave it before use
- What happens if they find a problem under the old sealant
- Whether the sealant suits the joint