West Berkshire · England
External & façade joints in North Heath, West Berkshire
External mastic across North Heath and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
How we handle external mastic in North Heath
A movement joint is only as good as its depth. 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 sealant pulling away from one side of the joint and gaps where render, brick and frames meet, we can put it right, whatever the surface.
Somewhere as small as North Heath, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Your job is guaranteed for a year, as with all our work.
- Place
- North Heath (RG20)
- Region
- West Berkshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Places near North Heath
Also in North Heath
When to call us in North Heath
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
It’s worth asking for a quote if you see:
- Panel joints letting water in
- Joints pointed up with cement by mistake
- Plants rooting in failed movement joints
- Joints with sealant missing in places
Rented homes near Newbury station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- Is VAT in the price?
- Whether you can choose the colour
- Whether they’re fully insured
- What the cure time is
What affects the cost of external mastic
For a quick quote, just ask. What matters most is:
- Whether the work is at height
- The old material and how stubborn it is
- Any working-time requirements on site
- Which sealant suits the joint
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- The rough size of the job
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
North Heath buildings and the weather
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 Shaw House (about 3.8 miles south) nearby, there’s older building stock in the area around North Heath as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Chieveley Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. If you live in an older home near Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
North Heath is about 5 miles north of Newbury, in West Berkshire. Homes, rented property, offices and hotels in North Heath can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. North Heath is one of 155 towns and villages in West Berkshire we cover. We also work in Reading, around 16 miles away.
Postcode districts we cover here for external mastic: RG20. Nearby, we also carry out external mastic in Chieveley (1 mile east), Downend (1 mile north-east), Winterbourne (2 miles south), Leckhampstead (2 miles north-west) and Peasemore (2 miles north). Within a short drive, we also cover Newbury (5 miles south), Thatcham (6 miles south-east), Burghfield Common (13 miles east), Speenhamland (4 miles south), Hungerford (9 miles south-west) and Calcot (12 miles east).
What’s near North Heath
Around North Heath, our work takes us to homes and buildings near The Wheatsheaf pub, among other places. For rail, the closest station is Newbury station, about 4.8 miles south of the centre. Other landmarks nearby include Donnington Castle (3.2 miles south) and West Berkshire Community Hospital (4.6 miles south-east). Green spaces nearby include Snelsmore Common.
When it isn’t the sealant
Before you book, it’s worth knowing the limits:
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
- Walls that need new movement joints cut into them
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
Joints and surfaces we work on
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Render & cladding joints
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
If you manage several properties in or around North Heath, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
How it works
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours to a few days, depending on the length of joint and the access for a typical job. In a small place like North Heath, access is usually 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.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
How to get a quote
For external mastic in North Heath, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before work begins.
Related advice
Questions from North Heath
Can you help a landlord with a rental near Newbury station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Do you cover North Heath for external mastic?
Yes. We work across London and the South East, and North Heath is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we will confirm the access.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on the building. Larger jobs naturally take longer.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.