Greater London · England
Glazing Silicone in Mapesbury
Glazing silicone in Mapesbury from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking glazing joints on a rooflight
- Water escaping where a screen meets the wall
- New silicone smeared over old sealant
What affects the quote in Mapesbury
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- The old material and how stubborn it is
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
- Access, such as stairs, a lift or height
Want a quote for glazing silicone? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Glazing silicone for homes and businesses in Mapesbury
Glass, frames and walls all move at different rates, and the silicone between them takes the strain. When it cracks or lets go, water gets in. We replace it with a glazing silicone that suits the glass and frame. We work on conservatory frames, shower screens and glass balustrade bases, and common reasons people get in touch are water escaping where a screen meets the wall and sealant that was laid over old silicone and failed.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Mapesbury.
Every job is covered by our 12-month guarantee.
- Location
- Mapesbury (HA9, HA0, NW10)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Your questions about glazing silicone in Mapesbury
Is parking a problem for a job in Mapesbury?
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.
Do you work for landlords with property near Wembley Stadium station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Where is Mr Mastic based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Is balustrade sealant something you do?
We can, if the base joint is sealed. Photos help us see what’s there when you ring 0345 464 0079 or drop us an email.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Are you insured?
Yes. We are fully insured.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can a conservatory leak be sealed?
In many cases, as long as sealant is the cause. We find where the water gets in first before any sealing.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Leaks from the roof covering or flashing (a roofer’s job)
- Misting between the panes of a double-glazed unit (a failed unit for a glazier)
- Cracked or broken glass
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before booking.
Where we work in Mapesbury
- Conservatory frames
- Glass-to-glass joints
- Glass-to-frame joints
- Shower screens
- Glass balustrade bases
- Rooflights
How the job changes by surface
Shower screens
A screen’s wall joint and tray joint are where leaks start. Both are resealed with anti-fungal silicone.
Conservatory frames
Frame joints face sun and rain all year. Renewed sealant keeps water out.
What we do, step by step
We keep the work tidy and contained to the joints we are treating. Expect the work to take a few hours for most jobs. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at the glazing and agree which joints need resealing.
- We cut away the failed silicone.
- The surfaces are cleaned with a suitable solvent.
- We apply and tool the new silicone.
- We inspect the work and test it where we can.
Before we arrive
- Keep children and pets away from the work area
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Advice
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Frames and glazing around Mapesbury
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. 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.
Schools such as St Joseph's RC Infant School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Wembley Stadium station, glazing joints are worth checking at the end of a tenancy, before a small leak grows. As a London address, Mapesbury can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Mapesbury is about 1 mile south-east of Wembley, in Greater London. Homes, rented property, offices and hotels in Mapesbury is covered for glazing silicone, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, Mapesbury among them. London is on our list too, about 9 miles from Mapesbury.
We work across HA9, HA0 and NW10 for glazing silicone. Local streets include London Road, Harrow Road and Cecil Avenue, all of which we cover. We also cover the places around Mapesbury: Tokyngton (1 mile south-east), Stonebridge Park (1 mile south-east), Wembley Park (1 mile north), Wembley (1 mile north-west) and Brent Park (1 mile east). Within a short drive, we also cover London (9 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles east), Kensington (5 miles south-east), St Pancras (7 miles east) and Shoreditch (9 miles east).
What’s near Mapesbury
Locally, jobs take us to homes and businesses close to The Swaminarayan School, Hilton London Wembley pub and St. Raphael's Edible Garden, among other places. Mapesbury has its own railway station: Wembley Stadium station. Well-known places in the area include Brent Museum and Archives (2.2 miles east) and Neasden Hospital (0.9 miles east). Not far away are Fox Wood and Middle Lake.
Also near Mapesbury
More services for Mapesbury
Why act early in Mapesbury
If the problem is a misted unit or a broken panel, sealant won’t help. We will tell you that rather than seal it anyway and point you to a glazier or roofer. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Mapesbury, the repair is bigger than a sealant job.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
Why choose Mr Mastic in Mapesbury
- Any old sealant cut out fully, not covered over
- A sealant colour to suit the surroundings
- More than 20 years in sealant work
- Rated 4.9 stars on Google