Bracknell Forest · England
Newell Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Newell Green. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Failed seals between different materials
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
How we quote for external mastic
Your quote is based on your job. We take into account:
- How much there is to do
- Whether the work is at height
- How many areas need sealing
- The product the joint needs
The cost reflects the work involved, not guesswork. That is why we ask a few questions first.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- The rough size of the job
- The problem you’ve noticed
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will take it from there.
External mastic in Newell Green
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you have brick movement joints where the sealant has split and old sealant gone brittle and cracked, we can put it right, whatever the surface.
Around Newell Green, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All our work is covered by a one-year guarantee.
- Location
- Newell Green (RG42)
- Region
- Bracknell Forest
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Newell Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Clear items away from the joints we are working on
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
How to get a quote
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or send us an email.
Related advice
What external mastic looks like in Newell Green
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 St Leonard's Hill (about 4.8 miles north-east) nearby, there’s older building stock in the area around Newell Green as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Sandy Lane Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Church of St Michael and All Angels include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Newell Green is about 2 miles north of Bracknell, in Bracknell Forest. For external mastic in and around Newell Green, please call 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Bracknell Forest. We cover 41 towns and villages across Bracknell Forest. For nearby work, see our Reading page (10 miles or so).
We cover every part of the RG42 postcode area for external mastic. External mastic is available to properties on Sutton Road, Abbey Place and Burge Place. Newell Green is on the B3034, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in Quelm Park (1 mile south-west), Lawrence Hill (1 mile south-east), Wick Hill (1 mile south), Whitegrove (1 mile south-east) and Warfield (1 mile north-east). Larger places within reach include Sandhurst (6 miles south), Great Hollands (3 miles south-west), Hanworth (3 miles south), College Town (6 miles south), Little Sandhurst (6 miles south-west) and Birch Hill (3 miles south).
Near you in Newell Green
We work in homes and buildings around Garth Hill College and Lambrook and the streets around them. The closest station to Newell Green is Bracknell station, roughly 1.4 miles south. A little further out are Heatherwood Hospital (3 miles south-east) and The Lexicon (1.1 miles south). For a walk, there’s Heath Lake and Holt Copse & Joel Park.
Why deal with it now?
Water gets in through a failed movement joint. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a small place like Newell Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Newell Green
- White, clear, grey or coloured to suit, where the product allows
- Fully insured
- Trusted Arbo and Everbuild sealants
- Neat joints and a tidy finish
See what affects the cost or our reviews.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Clear growth from the base of walls and joints
- Act on the first splits you see
- Point out the joints to other trades
- Check external joints each spring
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Newell Green: your questions answered
I let a flat near Bracknell station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Is it worth replacing old sealant in an older home in Newell Green?
Often, yes: cracked, shrunken or mouldy sealant has done its job. The key is cutting all the old sealant out, as new sealant will not bond to it.
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. We pick a colour that works with both materials.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access.
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.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Also near Newell Green
Also in Newell Green
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It won’t solve:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Subsidence or other structural problems
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
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, then guaranteed for a year.
Do you need external mastic in Newell Green?
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. The joint can’t move, so the wall cracks somewhere else instead.
It’s worth asking for a quote if you see:
- Failed sealant between panels on a façade
- Failed seals between different materials
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
For landlords with property near Bracknell station, outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- Whether the sealant suits the joint
- How much experience the applicator has
- When the joint can take water or movement
- Whether they seal over old material or remove it