Greater London · England
Window Mastic in North Brixton
Mastic around window and door frames, sills and patio doors for North Brixton, backed by a 12-month guarantee. Call for a quick quote.
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Gaps left after new windows were fitted
Window mastic in North Brixton: local notes
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. With historic houses such as Buckingham Palace (about 2.3 miles north-west) nearby, there’s older building stock in the area around North Brixton as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For an older house near a landmark such as St Michael's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as Van Gogh Academy, the mastic around its windows and doors needs looking after like any other building’s.
North Brixton is about 2 miles south-west of London, in Greater London. Jobs in North Brixton get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 764 places across Greater London.
Postcode districts we cover here for window mastic: SW9, SW8 and SE5. Whether your property is on Lett Road, Lorn Road and Oak Square or a nearby road, our applicators can take on the job. With the A203 close by, North Brixton is easy for our applicators to reach. Other places close to North Brixton include Angell Town (1 mile south), Little Portugal (1 mile west), Stockwell (1 mile south-west), South Lambeth (1 mile north-west) and Kennington (1 mile north-west). We also work in nearby towns such as City of Westminster (3 miles north-west), Marylebone (3 miles north-west), Kensington (4 miles north-west), St Pancras (4 miles north), Shoreditch (4 miles north-east) and Walthamstow (9 miles north-east).
Near you in North Brixton
Typical jobs here are in homes near The Crown & Anchor pub, Lambeth Palace Library and Durand Academy. Nearby too are Max Roach Park (0.5 miles south) and Platanos College (within half a mile west). North Brixton’s nearest station is Loughborough Junction station, about 0.7 miles south-east of the centre. A little further out are Type Museum (less than half a mile west) and St Giles' Hospital (1.3 miles east). Open spaces near North Brixton include Battersea Park Lake and Knight's Hill.
About our window mastic in North Brixton
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we’ll say so. We work on patio & French doors, window sills and composite doors, and common reasons people get in touch are gaps left after new windows were fitted and cold air getting in at the frame edge.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
Whatever the size of the job, you get the same one-year guarantee.
- Place
- North Brixton (SW9, SW8, SE5)
- Region
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- A door that needs adjusting, rehanging or new seals
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Joints and surfaces we work on
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- Aluminium frames
- uPVC windows
North Brixton questions
Is North Brixton in your area for window mastic?
Yes. We work across London and the South East, and North Brixton is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Do you work for landlords with property near Loughborough Junction station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
Is the new sealant paintable?
Not generally, if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
What does window mastic cost?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Leave it or put it right?
Choosing the product is half the job. Interior caulk and bathroom silicone aren’t made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in North Brixton.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Why North Brixton clients choose us
- ARBOMaster approved applicator
- 20+ years of sealant experience
- Experience in homes, commercial sites and hotels
- You choose the colour before work begins
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Clear any debris from frame drain holes
- Keep solvents and bleach off the sealant
- Air rooms to keep condensation down around windows
- Check the mastic once a year
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Work for landlords, hotels and businesses
For anyone letting property in or around North Brixton, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for.
What we are called out for in North Brixton
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
The most common problems we see are:
- A bead that does not match the frame
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
As a London address, North Brixton can be tricky for parking: let us know about parking bays, permits or a driveway.
Comparing quotes
- What insurance they hold
- What preparation is included
- Which colour the sealant will be
- Is the old sealant removed completely?
Towns and villages near North Brixton
Also in North Brixton
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes most of a day for a typical house, less for a few frames from start to finish. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in North Brixton. It helps if you can point us to a visitor permit or a bay close to the door.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
- Move anything stored near the joints
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.