Essex · England
External & façade joints in Elmdon, Essex
Professional external mastic in and around Elmdon, with every bit of old sealant taken out first and a one-year guarantee.
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
- Sealant pulling away from one side of the joint
External mastic for homes and businesses in Elmdon
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the joint does not stand out. If you have sealant that has lost its bond to the brick or render and water getting into walls through failed joints, we can help, on concrete & block, render & cladding joints and joints between brick and frames alike.
Outside joints can only be sealed when they’re dry, so work in Elmdon is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Elmdon (CB11)
- Wider area
- Essex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
What we do, step by step
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to several days, depending on the building. In a small place like Elmdon, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Mention if the joints have been sealed before
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
Read more
Surface by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and helps it last.
Common problems we fix in Elmdon
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Common reasons people contact us are:
- Old sealant gone brittle and cracked
- Panel joints letting water in
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
Rented homes near Great Chesterford station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Whether they’re fully insured
- How long to leave it before use
- Which sealant they’ll use, and why
- Whether they seal over old material or remove it
When something else is needed
Sealant is not the answer to every problem, and we’ll tell you before we start. It will not solve:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Façade panels
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
Elmdon questions
Can you help a landlord with a rental near Great Chesterford station?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover Elmdon for external mastic?
Yes, Elmdon is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
How long will you be here?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we’ll say how long yours will take.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
Why it’s worth doing now in Elmdon
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Older cottages and farmhouses around Elmdon can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why book with us
- We leave the area clean and tidy
- Arbo and Everbuild products
- Experience in homes, commercial sites and hotels
- We’re fully insured
Take a look at our cost guide and customer reviews.
External mastic in Elmdon: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Audley End House (about 3.9 miles east) nearby, there’s older building stock in the area around Elmdon as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to Church of St Nicholas include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Elmdon is about 5 miles west of Saffron Walden, in Essex. Elmdon gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Our Essex coverage runs to 644 places, Elmdon among them. For nearby work, see our Chelmsford page.
Postcode districts we cover here for external mastic: CB11. If you need external mastic at a property on Ickleton Road, Horseshoe Close and Hollow Road or a nearby road, our applicators can take on the job. We also cover the places around Elmdon: Upper Pond Street (2 miles south), Bridge Green (2 miles south), Ickleton (3 miles north-east) and Great Chesterford (3 miles north-east). Larger places within reach include Saffron Walden (5 miles east), Great Dunmow (15 miles south-east), Stansted Mountfitchet (10 miles south), Elsenham (9 miles south-east), Church End (15 miles south-east) and Thaxted (11 miles south-east).
Local landmarks in Elmdon
In Elmdon, that means homes and buildings near The Elmdon Dial pub. For rail, the closest station is Great Chesterford station, roughly 3 miles north-east. Nearby you will also find American Air Museum (3.9 miles north) and The Warren (4.4 miles south-west).
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Clear growth from the base of walls and joints
- Check the sealant is paintable before painting near it
- Avoid pressure-washing directly into sealant joints
- Keep movement joints as flexible joints, not mortar
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.