Essex · England
External & façade joints in Downham, Essex
Professional external mastic in and around Downham, with every bit of old sealant taken out first and a one-year guarantee.
- Rigid filler in a joint that should flex
- Weathered mastic that no longer stretches
- Failed sealant between panels on a façade
Quotes for external mastic in Downham
Jobs vary more than people expect. The main factors:
- Mould in or behind the old joints
- The old material and how stubborn it is
- Any working-time requirements on site
- The type of sealant required
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
When you contact us, these details help:
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- Where the job is, and your postcode
If you are in Downham and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before work begins.
External mastic for homes and businesses in Downham
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. We are often asked to deal with brick movement joints where the sealant has split and water getting into walls through failed joints, across concrete & block, render & cladding joints and copings & trims.
Somewhere as small as Downham, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, it’s backed by our one-year guarantee in Downham and across Essex.
- Place
- Downham (CM11)
- Wider area
- Essex
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Downham
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Leave it or put it right?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. In a small place like Downham, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits. We’ll give you a clear price for the lot.
Why us?
- Rated 4.9 stars on Google
- Full insurance on every job
- Over 20 years’ experience
- An ARBOMaster approved applicator
See our cost guide and customer reviews.
How the job changes by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it before sealing.
Common problems we fix in Downham
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Look out for these signs:
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
Letting a property close to Wickford station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Whether they’re fully insured
- Is VAT in the price?
- How long to leave it before use
- Which sealant they’ll use, and why
FAQs for Downham
Will you come out to Downham?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Wickford station. Can you help?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
What is a movement joint?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Where are you based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What external mastic looks like in Downham
Historic houses like Ingatestone Hall (about 4.7 miles west) are a reminder that the area around Downham has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as The Bromfords School and Sixth Form College, larger buildings have long runs of movement joint that eventually need resealing. In the older streets around Church of St Margaret, an extension built onto an older house moves differently, and the joint between them takes the strain.
Downham is about 3 miles north-west of Wickford, in Essex. Whether you’re in the middle of Downham or further out, we cover external mastic for every kind of property. Downham is one of 644 places in Essex where we work for external mastic. There’s also a page for Chelmsford, about 7 miles away.
Postcode districts we cover here for external mastic: CM11. If you need external mastic at a property on School Road, Crowsheath Lane and Sudbury Road or a nearby road, we can help. If you’re just outside Downham, we cover Ramsden Heath (1 mile west), Ramsden Bellhouse (1 mile south), Crays Hill (3 miles south), Stock (3 miles north-west) and Billericay (3 miles west). Larger places within reach include Chelmsford (7 miles north), Basildon (5 miles south), Brentwood (8 miles west), Maldon (10 miles north-east), Canvey Island (9 miles south-east) and Rayleigh (6 miles south-east).
Near you in Downham
Typical jobs here are in homes near The White Horse Public House, among other places. Downham’s nearest station is Wickford station, about 1.9 miles south-east. Nearby you will also find Barleylands Farm Museum (3.2 miles south-west) and Mayflower Community Hospital (3.9 miles west). Not far away are Crowsheath Wood.
Also in Downham
Aftercare tips
To keep the joints looking good and working properly:
- Fix overflowing gutters above sealed joints
- Wash walls gently around the sealant
- Ask before painting over external sealant
- Act on the first splits you see
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
What happens on the day
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere as small as Downham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
Getting ready for the visit
- Tell us if parking is tricky
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
Get a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.