Essex · England
External Mastic in Roydon
Problem with your movement joints in Roydon? We cut out the old, prepare the joints and apply the right sealant.
- Weeds or debris growing in open joints
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
Surface by surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
External mastic in Roydon
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We work on copings & trims, render & cladding joints and concrete & block, and common reasons people get in touch are cracked joints where brick meets render or frames and leaking joints around cladding and façade panels.
External sealant needs dry, clean surfaces, so work around Roydon is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Roydon (CM19)
- Region
- Essex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for external mastic
You’ll get a clear quote before we start. It takes into account:
- Whether the work is at height
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- Any mould that needs treating
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
When you call or email, these details help:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- How many joints, rooms or windows are involved
- Whether it has been sealed before
If you’re in Roydon and need external mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Places near Roydon
What else we do in Roydon
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Tell anyone working on the walls about the movement joints
- Keep movement joints as flexible joints, not mortar
- Keep soil, plants and ivy away from the joints
- Fix overflowing gutters above sealed joints
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Your questions about external mastic in Roydon
Do you cover Roydon for external mastic?
Yes, Roydon is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Do you cover smaller places like Roydon?
Yes. Roydon is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you have insurance?
Yes. Full insurance covers our work.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. We will reseal it with a flexible sealant.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
What external mastic looks like in Roydon
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Roydon station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. Managing a site like Roydon Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. Homes close to St Peter's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Roydon is about 3 miles north-east of Hoddesdon, in Essex. For external mastic in and around Roydon, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover Essex from our Crawley base. Roydon is one of 644 towns and villages in Essex where we work for external mastic. Our Chelmsford page covers work nearby, about 19 miles away.
We work across the CM19 postcode area for external mastic and the streets around it. Local streets include High Street, Temple Mead and Church Mead. If you are just outside Roydon, we cover Halls Green (1 mile south), Roydon Hamlet (1 mile south), Stanstead Abbotts (2 miles north-west), Tylerscross (2 miles south-east) and Great Parndon (2 miles south-east). Within a short drive, we also cover Harlow (3 miles east), Brentwood (15 miles south-east), Loughton (9 miles south), Waltham Abbey (6 miles south), Great Dunmow (15 miles north-east) and Epping (6 miles south-east).
Around Roydon
Typical jobs here are in homes near White Hart Public House and Hawkenbury Meadow, among other places. Roydon has its own railway station: Roydon station. Other landmarks nearby include Lowewood Museum (2.5 miles south-west) and Princess Alexandra Hospital (2 miles east). Green spaces nearby include Hunsdon Mead.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
What happens on the day
At the end, we look at the finished work together. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on the amount of work. For a village or hamlet like Roydon, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
Preparing for the visit
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
- Mention any tricky access
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Advice
Landlords, agents and businesses in Roydon
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will give you a quote.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Honest limits
We’ll always be straight with you, so here’s what new sealant will not do:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
If you are not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Roydon
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Copings & trims
- Joints between brick and frames
- Concrete & block