Greater London · England
Window & door mastic in Romford, Greater London
Mastic around window and door frames, sills and patio doors for homes and businesses in Romford and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Untidy mastic left by window fitters
- Mastic that’s falling out in pieces
- Draughty joints inside around the window
Window mastic for homes and businesses in Romford
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before we start. Just ring 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached. Typical jobs include mastic that’s falling out in pieces and a bead that doesn’t match the frame, on window sills, uPVC windows and composite doors.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Romford (RM1, RM7, RM11, RM2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
On the day, we start by going over the job with you. Surfaces next to the work are protected before work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. In Romford, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Mention any tricky access
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
Ask for a quote
To get a quote, call 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 work begins.
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What affects the quote in Romford
Jobs vary more than people expect. The main factors:
- How many rooms, windows or areas are involved
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
- Mould in or behind the old joints
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and give you a clear price before any work starts.
What we need to know
To help us quote quickly, let us know:
- What’s wrong with the joints now
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
We quote each job on its own, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Rotten timber, which needs a joiner first
- Damp coming through the wall itself rather than the frame joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Joints and surfaces we work on
- Composite doors
- Patio & French doors
- Aluminium frames
- Window sills
- uPVC windows
- Timber windows & doors
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Don’t aim a pressure washer at the joints
- Keep drainage slots and sill grooves clear
- Keep timber frames painted
- Air rooms to keep condensation down around windows
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What happens if it’s left?
Resealing frames is a short job: the visit takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Romford, the repair is bigger than a sealant job.
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start.
Why book with us
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide and our reviews.
Your questions about window mastic in Romford
Can you do window mastic in Romford?
Yes, Romford is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in Romford?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Is there any odour?
Possibly a little. It fades as the sealant cures.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Is the new sealant paintable?
Silicone generally won’t take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly.
What the job involves on each surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match suits the frame.
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the sealant goes in between frame and wall and tooled smooth.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What window mastic looks like in Romford
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
If you look after a building such as Concordia Academy, larger buildings have plenty of frames, and the mastic around each one ages. As a London address, Romford can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Romford station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Romford is about 12 miles west of Basildon, in Greater London. Jobs in Romford get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Romford is one of 764 towns and villages in Greater London where we work for window mastic. There’s also a page for London, roughly 13 miles from Romford.
Jobs for window mastic in RM1, RM7, RM11 and RM2 is quoted and booked the same way as anywhere else. You will find streets such as High Street, Market Place and Market Link. Being close to the A1251, Romford is simple for us to get to for window mastic. Other places close to Romford include Rush Green (1 mile south-west), Collier Row (1 mile north), Rise Park (1 mile north), Becontree Heath (1 mile south-west) and Chadwell Heath (2 miles west). Larger places within reach include London (13 miles south-west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (13 miles west), Shoreditch (12 miles west) and Walthamstow (9 miles west).
Near you in Romford
Locally, jobs take us to homes and businesses close to Lodge Farm Park, Frances Bardsley Academy for Girls and The Moon & Stars pub and the streets around them. Romford has its own railway station: Romford station. Well-known places in the area include The Brewery (under half a mile south-west) and Oldchurch Hospital (under half a mile south). Green spaces nearby include The Chase Nature Reserve.