Greater London · England
Gidea Park External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Gidea Park, with a one-year guarantee on every job. Call for a quick quote.
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
External mastic in Gidea Park
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 in a colour to suit. Typical jobs include joints where the bead has come unstuck and weeds or debris growing in open joints, on joints between brick and frames, façade panels and concrete & block.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall.
Your job is guaranteed for a year, as with all our work.
- Place
- Gidea Park (RM2, RM3, RM1)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Gidea Park
Can you do external mastic in Gidea Park?
Yes, Gidea Park is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Gidea Park station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area.
How long does the job take?
As a guide, most jobs take a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer, and we’ll say how long yours will take.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Gidea Park.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or email us.
Also near Gidea Park
Other services in Gidea Park
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Keep water from gutters off the wall
- Keep soil, plants and ivy away from the joints
- Make sure movement joints are not pointed over
- Leave the joints unpainted unless we have said otherwise
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants are not designed to be painted and spoil the finish.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What external mastic looks like in Gidea Park
Historic houses like Hare Hall (about 0.6 miles south-east) are a reminder that the area around Gidea Park 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.
For site and facilities teams at buildings such as Royal Liberty 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 St Michael and All Angels Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. As a London address, Gidea Park can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Gidea Park is about 1 mile north-east of Romford, in Greater London. For external mastic in and around Gidea Park, it’s easy to get a quote: please call 0345 464 0079 or email us. We are based in Crawley and cover Greater London. 764 places in Greater London are on our list. We also work in London, about 14 miles from Gidea Park.
Postcode districts we cover here for external mastic: RM2, RM3 and RM1. Whether your property is on Main Road, Brook Road and Bell Avenue or a nearby road, our applicators can take on the job. Other places close to Gidea Park include Gallows Corner (1 mile east), Ardleigh Green (1 mile south-east), Harold Wood (1 mile east), Heath Park (1 mile south) and Emerson Park (2 miles south-east). Larger places within reach include London (14 miles south-west), St Pancras (15 miles west), Shoreditch (13 miles west), Walthamstow (10 miles west), Hoxton (13 miles west) and Whitechapel (13 miles south-west).
Near you in Gidea Park
Typical jobs here are in homes near The Ship Public House, Havering College of Further and Higher Education and Gidea Park Primary School. For rail, the closest station is Gidea Park station, roughly 0.8 miles south of the centre. Well-known places in the area include Upminster Tithe Barn Museum of Nostalgia (2.9 miles south-east) and Harold Wood Hospital (1 mile east). Not far away are Bedfords Park.
What the job involves on each surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- When we can work, for business premises
- How many areas need sealing
- Mould in or behind the old joints
- The product the joint needs
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear price before any work starts.
Helping us quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
- The problem you’ve noticed
- The type of property
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, phone 0345 464 0079 or email us.
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
When something else is needed
New sealant can’t fix everything, and we’ll tell you before work begins. Sealant will not put right:
- Render that’s blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
- Walls that need new movement joints cut into them
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
The process
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the building in most cases. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Gidea Park. It helps if you can point us to a visitor permit or a bay close to the door.
- 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.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Clear the area around the work
- Mention any leaks or damp you’ve noticed
Ask for a quote
Every job is quoted individually. Just phone 0345 464 0079 or email us with the details, and pictures are welcome.