Essex · England
External & façade joints in Radwinter, Essex
Our applicators work in Radwinter on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
How we handle external mastic in Radwinter
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you have old sealant gone brittle and cracked and joints pointed up with cement by mistake, we can help, whatever the surface.
External sealant needs dry, clean surfaces, so work around Radwinter is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Our work is backed for twelve months, in Radwinter and everywhere else we cover.
- Location
- Radwinter (CB10)
- Wider area
- Essex
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Do you need external mastic in Radwinter?
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
If you can see any of these, it’s time to have the joints looked at:
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
- Sealant that has lost its bond to the brick or render
- Leaking joints around cladding and façade panels
If you live in an older home near Church of St Mary the Virgin, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- Which colour the sealant will be
- What preparation is included
- Whether they’re fully insured
- When the joint can take water or movement
Quotes for external mastic in Radwinter
The quote reflects the job in front of us. We take into account:
- The type of sealant required
- The number of rooms or windows
- The number and length of the joints
- Access and height
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
Before you ask for a quote, have a think about:
- Any access issues, like height or stairs
- Whether it has been sealed before
- Where the property is
- The rough size of the job
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before any work starts.
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a small place like Radwinter, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Why us?
- Colour picked to suit the job
- Arbo and Everbuild products
- A choice of colours where the product allows
- Over 20 years’ experience
How the job changes by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. We prime where the sealant needs it.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Clear growth from the base of walls and joints
- Check external joints each spring
- Ask before painting over external sealant
- Fix overflowing gutters above sealed joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Towns and villages near Radwinter
More services for Radwinter
Common questions in Radwinter
Is external mastic in Radwinter guaranteed?
All our work, in Radwinter and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover smaller places like Radwinter?
Yes, Radwinter 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.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
How long does external mastic last?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or send us an email.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Do you work at height?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we’ll confirm the access.
External mastic in Radwinter: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Radwinter Church of England Voluntary Aided Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Radwinter is about 4 miles east of Saffron Walden, in Essex. Jobs in Radwinter get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Radwinter is one of 644 places in Essex we cover. We also work in Chelmsford, around 20 miles away.
Our applicators cover all of the CB10 postcode area for external mastic. External mastic is available to properties on East View Close, Water Lane and Gillon Way and the roads around them. We also cover the places around Radwinter: The Common (1 mile north), Maple End (1 mile west), Wimbish (1 mile south-west), Hempstead (2 miles east) and Church End (3 miles north-west). We also work in nearby towns such as Braintree (13 miles south-east), Saffron Walden (4 miles west), Halstead (14 miles east), Great Dunmow (10 miles south), Stansted Mountfitchet (10 miles south-west) and Great Notley (13 miles south-east).
Near you in Radwinter
Nearby you will also find Castle Camps (3.3 miles north-east) and Saffron Walden Community Hospital (3.6 miles west). Open spaces near Radwinter include West Wood.
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Radwinter, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.