Surrey · England
External & façade joints in Munstead Heath, Surrey
Our applicators work in Munstead Heath on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Movement joints filled with mortar instead of sealant
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
External mastic for homes and businesses in Munstead 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 that has lost its bond to the brick or render and failed sealant between panels on a façade, we can put it right, whatever the surface.
Around Munstead Heath, 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.
Every job is covered by our 12-month guarantee.
- Place
- Munstead Heath (GU8)
- Wider area
- Surrey
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Do you need external mastic in Munstead Heath?
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
The most common problems we see are:
- Sealant pulling away from one side of the joint
- Damp patches traced to an open external joint
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
For an older house near a landmark such as St John the Baptist Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- What preparation is included
- What guarantee comes with the work
- What the quote includes, VAT included or not
- What happens if they find a problem under the old sealant
Places near Munstead Heath
Also in Munstead Heath
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
If you manage several properties in or around Munstead Heath, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render around the joint, so the damage spreads beyond the joint. Where a wall is exposed, as many are in small places like Munstead Heath, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why choose Mr Mastic in Munstead Heath
- One-year guarantee on every job
- Trusted Arbo and Everbuild sealants
- Fully insured
- Sealant colour chosen to suit
See our cost guide and our reviews.
What affects the cost of external mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- The number and length of the joints
- Any mould that needs treating
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and give you a clear quote before any work starts.
What we need to know
When you call or email, these details help:
- If someone has resealed it before
- Pictures of the joints, sent by email
- The rough size of the job
- Whether it’s a home or a business
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, phone 0345 464 0079 or email us.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. Somewhere as small as Munstead Heath, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved.
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What external mastic looks like in Munstead Heath
Historic houses like Loseley Park (about 3 miles north) are a reminder that the area around Munstead Heath has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Schools such as Busbridge Infant School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Godalming station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Munstead Heath is about 5 miles south of Guildford, in Surrey. Anywhere in GU8, our applicators can take on external mastic. Our Surrey coverage runs to 395 places, and Munstead Heath is one of them. Crawley is on our list too, about 18 miles from Munstead Heath.
All of GU8 is within our area for external mastic, from the main roads to the quietest streets. Nearby, we also carry out external mastic in Thorncombe Street (1 mile east), Hascombe (2 miles south-east), Birtley Green (2 miles east), Bramley (2 miles north-east) and Grafham (2 miles east). Larger places within reach include Guildford (5 miles north), Woking (10 miles north), Camberley (13 miles north-west), Farnham (9 miles west), Dorking (12 miles east) and Frimley (11 miles north-west).
Near you in Munstead Heath
Typical jobs here are in homes near Phillips Memorial Park, Godalming College and St Hilary's School, among other places. The closest station to Munstead Heath is Godalming station, roughly 1.5 miles north-west. Well-known places in the area include Godalming Museum (1.3 miles north-west) and Milford Hospital (1.4 miles west). Green spaces nearby include Farncombe Wood and Frith Hill.
Questions from Munstead Heath
Can you help a landlord with a rental near Godalming station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Is Munstead Heath within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back, so the joint can move.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used before we leave.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Do you have insurance?
Yes. Full insurance covers our work.
How long does external mastic take?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Bigger jobs take longer, and we’ll tell you how long to expect.
Surface by surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap and keep the sealant to the right depth.
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.