Hertfordshire · England
External & façade joints in Rush Green, Hertfordshire
We cover Rush Green for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Failed sealant between panels on a façade
- Weeds or debris growing in open joints
- Gaps where render, brick and frames meet
External mastic in Rush Green, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall so the line blends in. Typical jobs include cracked joints where brick meets render or frames and sealant pulling away from one side of the joint, on copings & trims, render & cladding joints and façade panels.
Somewhere as small as Rush 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.
All of our work is guaranteed for twelve months.
- Place
- Rush Green (SG13, SG12)
- Region
- Hertfordshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Rush Green buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Wheatcroft Primary 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 Ware station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Rush Green is about 1 mile south-west of Ware, in Hertfordshire. From the centre of Rush Green to the outskirts, external mastic is available for homes and businesses alike. Our Hertfordshire coverage runs to 381 places, Rush Green among them. We also work in London, around 21 miles away.
We work across SG13 and SG12 for external mastic. Local streets include Ryder Close and Martins Drive, all of which we cover. We also cover the places around Rush Green: Foxholes (1 mile south-west), Hertford Heath (1 mile south), Little Amwell (1 mile south), Great Amwell (1 mile east) and Hailey (1 mile south-east). We also work in nearby towns such as Stevenage (10 miles north-west), St Albans (13 miles west), Bishop's Stortford (10 miles north-east), Welwyn Garden City (6 miles west), Harpenden (13 miles west) and Hitchin (14 miles north-west).
Local landmarks in Rush Green
Around Rush Green, our work takes us to homes and buildings near Hertford Regional College, Presdales School and The King's Mead Pub Ware, among other places. The closest station to Rush Green is Ware station, roughly 0.9 miles north-east of the centre. A little further out are Museum of Street Lighting (1.1 miles east) and Barrowfield (within half a mile north-west). For a walk, there’s King's Meads.
Also near Rush Green
More services for Rush Green
How the job changes by surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
When to call us in Rush Green
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:
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
In the older streets around Church of the Holy Trinity, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- When the joint can take water or movement
- Whether they seal over old material or remove it
- Whether they’re fully insured
- Which sealant they’ll use, and why
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It usually takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Rush Green, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll take it from there.
Read more
Can I do it myself?
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.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. In a small place like Rush Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
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, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Rush Green
- White, clear, grey or coloured to suit, where the product allows
- More than 20 years in sealant work
- Colour agreed with you before we start
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and what customers say.
What affects the cost of external mastic
We quote each job individually. These are the things that affect it:
- The amount of work
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
What to tell us for a quote
To help us quote quickly, let us know:
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- Whether it’s a home or a business
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, call 0345 464 0079 or email us.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Your questions about external mastic in Rush Green
I let a flat near Ware station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Rush Green?
Yes, Rush Green is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can new sealant go over the old?
No, it will not last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
How long should I leave it?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Why do you put foam in the joint first?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding so the bead can stretch.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.