Greater London · England
Sand mastic for sash & case windows in Queen's Park, Greater London
Sand mastic in Queen's Park from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Crumbling sand mastic round a window
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
What the job involves on each surface
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Sand mastic in Queen's Park
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We work on tenement windows, brick reveals and timber door frames, and common reasons people get in touch are open joints round the window box and gaps round a timber door in stone or brick.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
There’s a 12-month guarantee on every job.
- Where
- Queen's Park (NW6, W9, W10)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Queen's Park, the repair is bigger than a sealant job.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email.
Why Queen's Park clients choose us
- Domestic, commercial and hotel work
- Tidy, careful work
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
See what affects the cost or our reviews.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Queen's Park questions
Can you do sand mastic in Queen's Park?
Yes. We work across London and the South East, and Queen's Park is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Is parking an issue for sand mastic in Queen's Park?
Parking in Queen's Park, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
How long does sand mastic take to go off?
It takes a while. The skin forms first, and the full set comes later and we will give you an idea for your job.
Are you fully insured?
Yes. We are fully insured.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Should I check with the council before work on a listed or conservation-area home?
Your local planning authority is the one to ask. They’ll tell you if consent is needed for work to your windows.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Also near Queen's Park
Other services in Queen's Park
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Sashes that rattle, stick or will not open
- Decisions on consent for listed homes
- Crumbling stone or brickwork round the window
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Brick reveals
- Stone surrounds
- Timber door frames
- Tenement windows
- Period & listed homes
- Sash and case windows
Work for landlords, hotels and businesses
For anyone letting property in or around Queen's Park, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
How the visit works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes a few hours for a single window, longer for several. For a job in Queen's Park, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
- Mention if the joints have been sealed before
How to get a quote
We don’t publish a price list. Instead, we give you a clear quote for your job. To get started, call 0345 464 0079 or drop us an email.
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Do you need sand mastic in Queen's Park?
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint, and they usually need raking out.
Common reasons people contact us include:
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
- Mastic dropping out of the joint
Queen's Park is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
What your quote should include
- How the joint is cleaned and prepared
- Whether they’re fully insured
- Who turns up on the day
- The length of the guarantee
What sand mastic looks like in Queen's Park
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Queens Park (London) station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as St Luke's CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Queen's Park is about 2 miles south-west of Hampstead, in Greater London. Our applicators cover sand mastic for homeowners, landlords and businesses in Queen's Park, as part of our work across Greater London. Queen's Park is one of 764 towns and villages in Greater London we cover.
Our applicators cover all of the NW6, W9 and W10 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on Kempe Road, Peach Road and Parry Road or anywhere close by, our applicators can take on the job. We also cover the places around Queen's Park: Kilburn (1 mile north), Kensal Rise (1 mile west), Kensal Town (1 mile south-west), Brondesbury (1 mile north) and Kensal Green (1 mile west). Further out, we also cover London (5 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), St Pancras (4 miles east), Shoreditch (5 miles east) and Walthamstow (9 miles north-east).
What’s near Queen's Park
In Queen's Park, that means homes and buildings near Queen’s Park, Maida Vale School and St Augustine's Church of England High School. There’s a railway station in Queen's Park itself: Queens Park (London) station. A little further out are Montfichet's Tower (4.6 miles east) and O2 Centre (1.3 miles north-east). Not far away are Greville Place nature reserve and Primrose Hill.