Greater London · England
Raynes Park Sand Mastic
Specialist sand mastic for Raynes Park: careful preparation, the right product and tidy work. Call for a quick quote.
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
- Tired mastic found when preparing windows for paint
Sand mastic in Raynes Park, done properly
We work across Raynes Park renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. We work on sash and case windows, brick reveals and stone surrounds, and the jobs we see most are failed mastic on an exposed elevation and mastic dropping out of the joint.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Raynes Park.
Big or small, it’s backed by our 12-month guarantee.
- Location
- Raynes Park (SW20, KT3, SM4)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask us before painting near the mastic
- Take care around the mastic when scraping paint
- Keep modern sealant off the mastic
- Look over the window mastic once a year
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Leave it or put it right?
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Raynes Park, the repair is bigger than the sealant job would have been.
Leaving a failed joint normally makes the job bigger, not smaller. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Raynes Park
- Fully insured
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
Take a look at our cost guide and what customers say.
What we do, step by step
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a single window, longer for several. For a job in Raynes Park, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Mention any tricky access
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
Ask for a quote
If you’re in Raynes Park and need sand mastic, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Do you need sand mastic in Raynes Park?
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
Keep an eye out for any of the following:
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
- Window mastic to renew ahead of painting
In the older streets around St Saviour's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before booking anyone
- What happens if the job turns out different
- Whether they seal over old material or remove it
- When the joint can take water or movement
- How long the guarantee is
What the job involves on each surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Raynes Park questions
Is Raynes Park in your area for sand mastic?
Yes, Raynes Park is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
I let a flat near Raynes Park station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Should I use sand mastic or silicone?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we’ll advise.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Are you insured?
Yes. We are fully insured.
Landlords, agents and businesses in Raynes Park
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Frames and glazing around Raynes Park
Historic houses like Southside House (about 0.9 miles north) are a reminder that the area around Raynes Park has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
As a London address, Raynes Park can be tricky for parking: let us know about parking bays, permits or a driveway. Managing a site like West Wimbledon Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Raynes Park is about 2 miles south-west of Wimbledon, in Greater London. Raynes Park gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, Raynes Park among them. You can also see our page for London, about 9 miles away.
Jobs for sand mastic in SW20, KT3 and SM4 is quoted and booked the same way as anywhere else. Whether your property is on Gore Road, Edna Road and Wyke Road or a nearby road, we can help. Raynes Park sits on or near the A238 and A298, which makes travel easy. We also cover West Barnes (1 mile south-west), Bushey Mead (1 mile north-east), Cannon Hill (1 mile east), Motspur Park (1 mile north-west) and Wimbledon Chase (1 mile north-east). Larger places within reach include London (9 miles north-east), City of Westminster (8 miles north-east), Marylebone (9 miles north-east), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Near you in Raynes Park
Locally, jobs take us to homes and businesses close to Raynes Park High School, The Raynes Park Tavern and Cannon Hill Common, among other places. There’s a railway station in Raynes Park itself: Raynes Park station. Well-known places in the area include Wimbledon Museum (1.5 miles north-east) and Atkinson Morley Hospital (1 mile north). Green spaces nearby include Henman Hill and Derwent Floodwash.
How we quote for sand mastic
Your quote is based on your job. We take into account:
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- Mould in or behind the old joints
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Roughly how big the job is
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Where the job is, and your postcode
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.