Greater London · England
Oakwood External Mastic
Specialist external mastic for Oakwood: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
When something else is needed
To be straight with you, there are a few things sealant will not fix:
- Cracks in the bricks or render themselves, away from the joints
- Movement that is more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Concrete & block
- Copings & trims
How we handle external mastic in Oakwood
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where mortar or filler would crack. Common call-outs are for water getting into walls through failed joints and rigid filler in a joint that should flex, on render & cladding joints, façade panels and joints between brick and frames.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so one failed joint can cause damp for more than one household. In a converted house in Oakwood, it’s worth checking who is responsible for the outside before booking.
All our work comes with our 12-month guarantee, wherever you are in Greater London.
- Place
- Oakwood (N14, N21, EN2)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need external mastic in Oakwood?
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
These are the problems we’re asked about most:
- Sealant that has lost its bond to the brick or render
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
In the older streets around St Thomas's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Before you book anyone
- How hidden problems are handled
- Whether VAT is included
- Whether the sealant suits the joint
- How much experience the applicator has
Places near Oakwood
Also in Oakwood
Why it’s worth doing now in Oakwood
Sealing over the top of old mastic does not hold for long. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
No two jobs are quite the same, so we quote each one individually. 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 us?
- Domestic, commercial and hotel work
- We are fully insured
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost and customer reviews.
Questions from Oakwood
Can parking be tricky for a visit in Oakwood?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Is Oakwood in your area for external mastic?
Yes, Oakwood 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 will give you a clear quote.
Do you work at height?
It depends on the building. Send us photos and a rough idea of the height.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Pointing it stops it working, and the wall may crack nearby. A flexible sealant is the right fill.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
Walls and rooflines in Oakwood
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. With historic houses such as Forty Hall (about 3.1 miles north-east) nearby, there’s older building stock in the area around Oakwood as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
As a London address, Oakwood can be tricky for parking: let us know about parking bays, permits or a driveway. Managing a site like Wolfson Hillel Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Oakwood is about 2 miles west of Enfield, in Greater London. Across the N14 area, we can carry out external mastic at your property. Oakwood is one of 764 places in Greater London we cover. For nearby work, see our London page (10 miles or so).
Our applicators cover all of the N14, N21 and EN2 postcode area for external mastic and the streets around it. That includes homes and businesses on Ivy Road, Green Road and Chase Road. We also cover World's End (1 mile east), Osidge (1 mile south-west), Southgate (1 mile south), Grange Park (1 mile east) and East Barnet (1 mile south-west). Within a short drive, we also cover London (10 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (8 miles south) and Shoreditch (8 miles south).
Near you in Oakwood
Around Oakwood, our work takes us to homes and buildings near The New Crown pub, Oakwood Park and Southgate School, among other places. The nearest railway station is Winchmore Hill station, roughly 1.3 miles south-east of the centre. Other landmarks nearby include Grand Arcade (2.9 miles south-west) and Broomfield House Museum (1.9 miles south). Open spaces near Oakwood include Oakleigh Park Rail Cutting and Darland's Lake.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access and we leave things clean and tidy. In Oakwood, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs 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
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
- Let us know about stairs, lifts or work at height
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or drop us an email.
Related advice
How we quote for external mastic
For a quick quote, just ask. What matters most is:
- The number and length of the joints
- The type of sealant required
- Whether the work is at height
- Any working-time requirements on site
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- The type of property
- The rough size of the job
- Any access issues, like height or stairs
- The address or postcode of the job
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Landlord and commercial work in Oakwood
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Oakwood, several properties can be quoted together. Just tell us the addresses and what each one needs.
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.