Hertfordshire · England
Bury Green External Mastic
Problem with your movement joints in Bury Green? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
- Moss and dirt in joints with no sealant left
When it is not the sealant
It helps to know what we cannot do:
- Subsidence or other structural problems
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
About our external mastic in Bury Green
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 work on brickwork movement joints, joints between brick and frames and concrete & block, and people most often call us about hard, crazed mastic that has stopped moving and sealant that has lost its bond to the brick or render.
Somewhere as small as Bury Green, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Bury Green (SG11)
- Wider area
- Hertfordshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Bury Green
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Where a wall is exposed, as many are in small places like Bury Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Neat joints and a tidy finish
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
Take a look at what affects the cost or customer reviews.
FAQs for Bury Green
Do you cover Bury Green for external mastic?
Yes. Our work covers London and the South East, and Bury Green is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Bishops Stortford station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides.
Should I point up the gap in my brickwork?
No. Rigid materials can’t move with the wall and the joint fails. Where a joint has been mortared, it can often be raked out and sealed properly.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Why is there a gap in my brick wall?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It should be filled with flexible sealant, never mortar.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Will the new joint stand out?
The sealant colour is picked to suit the wall so the joint blends in. Exterior sealants come in a good range of colours.
Outside joints around Bury Green
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. With historic houses such as Much Hadham Palace (about 1.5 miles south-west) nearby, there’s older building stock in the area around Bury Green as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Rented homes near Bishops Stortford station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Little Hadham Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Bury Green is about 2 miles west of Bishop's Stortford, in Hertfordshire. Wherever you are in the SG11 postcode area, our applicators can take on external mastic. 381 places in Hertfordshire are on our list. You can also see our page for Chelmsford, about 19 miles away.
Postcode districts we cover here for external mastic: SG11. Local streets include Farm Place, Lower Road and Acremore Street, and we cover them all. Nearby, we also carry out external mastic in Thorley (2 miles south-east), Bishop's Stortford (2 miles east), Allen's Green (2 miles south), Thorley Street (3 miles south-east) and Spellbrook (3 miles south-east). Within a short drive, we also cover Stevenage (13 miles west), Welwyn Garden City (14 miles west), Hoddesdon (10 miles south-west), Cheshunt (13 miles south-west), Hertford (9 miles south-west) and Ware (7 miles south-west).
Around Bury Green
Around Bury Green, our work takes us to homes and buildings near St Mary's Catholic School, among other places. The nearest railway station is Bishops Stortford station, roughly 2.5 miles east of the centre. Other landmarks nearby include Bishops Stortford Local History Museum (2.3 miles north-east) and Herts and Essex Hospital (2.9 miles east). Not far away are Thorley Wash nature reserve.
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. It generally takes anything from a few hours to several days, depending on the building. In a small place like Bury Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or email us.
Read more
DIY sealant or a professional job?
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.
Towns and villages near Bury Green
Other services in Bury Green
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Avoid pressure-washing directly into sealant joints
- Make sure movement joints aren’t pointed over
- Deal with leaking gutters that soak the joints below
- Look over the joints every year, ideally after winter
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Do you need external mastic in Bury Green?
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint cannot move, so the wall cracks somewhere else instead.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
If you live in an older home near Parish Church of St Cecilia, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- Whether they’re fully insured
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
- How long the guarantee is