Greater London · England
Sand Mastic in Hanwell
Professional sand mastic in and around Hanwell, with old sealant always removed completely.
- Wind and rain getting in round a sash window
- Weathered mastic on the most exposed windows
- Gaps round a timber door in stone or brick
About our sand mastic in Hanwell
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on stone surrounds, brick reveals and timber door frames, and common reasons people get in touch are modern sealant on a period surround and wind and rain getting in round a sash window.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Hanwell (W7, W13, UB2)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Hanwell
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.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we are fully insured.
What the job involves on each surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Your questions about sand mastic in Hanwell
Do you work for landlords with property near Hanwell station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Do you cover Hanwell for sand mastic?
Yes. We work across London and the South East, and Hanwell is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in and agree one before work begins.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
Where is Mr Mastic based?
We’re based in Crawley, and we cover South East England, London and all of Scotland.
What we can’t put right
It helps to know what we can’t do too:
- Sashes that rattle, stick or won’t open
- Decisions on consent for listed homes
- Cracked or broken glass
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Where we work in Hanwell
- Tenement windows
- Timber door frames
- Sash and case windows
- Period & listed homes
- Brick reveals
- Stone surrounds
Signs you need sand mastic in Hanwell
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Any of these means the joints need attention:
- Open joints round the window box
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- A silicone bead on a sash window that spoils the look
For site and facilities teams at buildings such as St Joseph's Catholic Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Whether the sealant suits the joint
- Whether you can choose the colour
- What insurance they hold
- How long the guarantee is
Also near Hanwell
What else we do in Hanwell
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
How it works
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. In Hanwell, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
Getting a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You will have a clear quote before work begins.
Advice
Hanwell homes and the weather
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking. With historic houses such as Pitzhanger Manor (about 1.3 miles east) nearby, there’s older building stock in the area around Hanwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Hanwell station, cracked sand mastic around sash windows lets in the draughts tenants complain about. As a London address, Hanwell can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Hanwell is about 1 mile west of Ealing, in Greater London. For sand mastic in and around Hanwell, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London. Our Greater London coverage runs to 764 places, Hanwell among them. For nearby work, see our London page.
Here we cover the W7, W13 and UB2 postcode area for sand mastic. Whether your property is on Park Road, Green Lane and Felix Road or a nearby road, we can help. Being close to the A4001, Hanwell is easy for our applicators to reach for sand mastic. We also cover the places around Hanwell: West Ealing (1 mile west), Ealing (1 mile east), Dormers Wells (1 mile north-west), South Ealing (1 mile south-east) and Pitshanger (2 miles north-east). Within a short drive, we also cover London (10 miles east), City of Westminster (8 miles east), Marylebone (8 miles east), Kensington (6 miles east), St Pancras (10 miles east) and Shoreditch (11 miles east).
What’s near Hanwell
We work in homes and buildings around Drayton Manor High School, Cuckoo Schools and Drayton Green. There’s a railway station in Hanwell itself: Hanwell station. Other landmarks nearby include Ealing Hospital (under half a mile west) and Gunnersbury Park House - Large Mansion (2.3 miles east). The countryside around Hanwell includes Middle Lake and Castlebar Hill.
Leave it or put it right?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Leaving a failed joint usually makes the job bigger, not smaller. If you’re unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Hanwell clients choose us
- Homes, businesses and hotels
- Fully insured
- 4.9 on Google from 180+ five-star reviews
- Arbo and Everbuild products
Read our cost guide and our reviews.