Essex · England
Marks Gate External Mastic
Our applicators work in Marks Gate on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
External mastic for homes and businesses in Marks Gate
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. If you have old sealant gone brittle and cracked and joints with sealant missing in places, we can help.
External sealant needs dry, clean surfaces, so work around Marks Gate is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Each job carries a 12-month guarantee.
- Location
- Marks Gate (RM7, RM5, RM6)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant where it can be done safely.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Why it’s worth doing now in Marks Gate
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Marks Gate can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and give you a clear price before work begins.
Why us?
- Quality sealants from Arbo and Everbuild
- More than 20 years in sealant work
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
See how sealant jobs are priced and our reviews.
Walls and rooflines in Marks Gate
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. Historic houses like Hare Hall (about 2.8 miles east) are a reminder that the area around Marks Gate has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Crownfield Infant School, its movement joints, gutters and trims need looking after like any other building’s. Rented homes near Chadwell Heath station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around St Mark's, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Marks Gate is about 2 miles north-west of Romford, in Essex. Our applicators cover external mastic for homes and businesses in Marks Gate, as part of our work across Essex. Across Essex, we cover 644 places, Marks Gate among them. Our London page covers work nearby, about 12 miles away.
Postcode districts we cover here for external mastic: RM7, RM5 and RM6. Local streets include Walton Road, Hamlet Road and Hog Hill Road, all of which we cover. Main roads around Marks Gate include the A1112, which makes travel easy. Nearby, we also carry out external mastic in Chadwell Heath (1 mile south), Little Heath (1 mile south-west), Collier Row (1 mile east), Rise Park (2 miles east) and Romford (2 miles south-east). Further out, we also cover Basildon (14 miles east), Harlow (12 miles north), Brentwood (7 miles east), Billericay (12 miles east), Loughton (5 miles north-west) and Waltham Abbey (9 miles north-west).
Near you in Marks Gate
Around Marks Gate, our work takes us to homes and buildings near The Warren School, Fairlop Waters and Colley Rowe Inn. For rail, the closest station is Chadwell Heath station, about 1.9 miles south. A little further out are Redbridge Museum (3.8 miles south-west) and Romford Shopping Hall (1.8 miles south-east). For a walk, there’s Hainault Lodge.
Towns and villages near Marks Gate
What else we do in Marks Gate
Your questions about external mastic in Marks Gate
Do you cover Marks Gate for external mastic?
Yes. We work across London and the South East, and Marks Gate is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Do you work for landlords with property near Chadwell Heath station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, large or small.
Is it OK to fill a movement joint with cement?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Where are you based?
Our base is Crawley. Our area covers South East England, London and Scotland.
How long should I leave it?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.
Aftercare tips
Aftercare is simple:
- Make sure movement joints are not pointed over
- Clear growth from the base of walls and joints
- Point out the joints to other trades
- Avoid pressure-washing directly into sealant joints
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
DIY sealant or a professional job?
If you’re 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 doesn’t work out, we can still put it right.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Landlords, agents and businesses in Marks Gate
From a single let to 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 Marks Gate, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
What happens on the day
We keep the work tidy and contained to the area we are working on, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Somewhere like Marks Gate needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work.
Related advice
Honest limits
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Surfaces we seal
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Façade panels