Hertfordshire · England
External & façade joints in Lower Sheering, Hertfordshire
Sealing brickwork movement joints, render, cladding and façade joints in Lower Sheering, with a one-year guarantee on every job. Ask us for a quote.
- Water getting into walls through failed joints
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
How we handle external mastic in Lower Sheering
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. Typical jobs include damp patches traced to an open external joint and cracked joints where brick meets render or frames, across brickwork movement joints, concrete & block and render & cladding joints.
In a village or hamlet like Lower Sheering, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Our work is backed for twelve months, in Lower Sheering and everywhere else we cover.
- Where
- Lower Sheering (CM21, CM22)
- Region
- Hertfordshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for external mastic in Lower Sheering
There’s no set price list. The quote depends on:
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Working hours on commercial sites
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Any previous sealing or DIY work
- The rough size of the job
- The address or postcode of the job
- What’s wrong with the joints now
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 before giving you a price.
Common problems we fix in Lower Sheering
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
The problems people usually mention when they call are:
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Movement joints with cracked, split or missing sealant
Homes close to Parish Church of Great St Mary's include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before booking anyone
- Whether you can choose the colour
- How much experience the applicator has
- How hidden problems are handled
- Whether they’re fully insured
Also near Lower Sheering
Also in Lower Sheering
Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
When it is not the sealant
It helps to know what we cannot do:
- Cracked brickwork or render that needs a builder or plasterer
- Damp that isn’t coming from the joint
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Façade panels
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
External mastic in Lower Sheering: 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. Historic houses like Barrington Hall (about 4.2 miles north-east) are a reminder that the area around Lower Sheering 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.
Rented homes near Sawbridgeworth station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as Fawbert and Barnard Infants' School, its movement joints, gutters and trims need looking after like any other building’s.
Lower Sheering is about 3 miles north-east of Harlow, in Hertfordshire. Anywhere in CM21, we can carry out external mastic at your property. Lower Sheering is one of 381 towns and villages in Hertfordshire where we work for external mastic. For nearby work, see our Chelmsford page.
We work across the CM21 and CM22 postcode area for external mastic and the streets around it. Whether your property is on Back Lane, Vantorts Road and Forebury Avenue or anywhere close by, we can help. We also cover the places around Lower Sheering: Sawbridgeworth (1 mile west), Sheering (1 mile east), High Wych (2 miles west), Gaston Green (2 miles north) and Spellbrook (2 miles north). Larger places within reach include Bishop's Stortford (4 miles north), Welwyn Garden City (15 miles west), Hoddesdon (8 miles south-west), Cheshunt (11 miles south-west), Hertford (10 miles west) and Ware (8 miles west).
Landmarks near Lower Sheering
We work in homes and buildings around Leventhorpe, Gibberd Garden and King William IV Public House. Lower Sheering has its own railway station: Sawbridgeworth station. Nearby you will also find Harlow Mill (1.9 miles south-west) and Mark Hall Cycle Museum (2.6 miles south-west). Open spaces near Lower Sheering include Portingbury Hills and Sawbridgeworth Marsh.
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best year round.
Cladding and façade panels
If the façade has a specified sealant, that is what we use, or one the system allows. Send us any details you have about the façade.
Why it’s worth doing now in Lower Sheering
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Lower Sheering can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Lower Sheering
- You choose the colour before work begins
- Rated 4.9 stars on Google
- A choice of colours where the product allows
- An ARBOMaster approved applicator
Read what affects the cost or our reviews.
Questions from Lower Sheering
Can you do external mastic in Lower Sheering?
Yes, Lower Sheering is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Will you come out to Lower Sheering?
Yes, Lower Sheering is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides, primed where needed.
Do you guarantee your work?
Yes, for a year. If there’s a problem with our work in that time, tell us and we’ll put it right.
How do I get a quote for external mastic in Lower Sheering?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email and tell us what needs doing and where.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first.
The process
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. The work normally takes a few hours to a few days, depending on the length of joint and the access. In a small place like Lower Sheering, access is generally the main thing to plan. 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.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.