Greater London · England
Cranford Sand Mastic
Problem with your window and door surrounds in Cranford? We remove the old material, prepare the joints and seal them properly.
- Window mastic to renew ahead of painting
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
- Crumbling stone or brickwork round the window
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Tenement windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Sash and case windows
Sand mastic for homes and businesses in Cranford
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. Typical jobs include draughts and rain around sash boxes and open joints round the window box, on timber door frames, sash and case windows and brick reveals.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
Every job comes with our 12-month guarantee.
- Place
- Cranford (TW4, TW5, UB3)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes anything from a few hours to a full day, depending on how many windows. In Cranford, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and send you a clear quote before we start.
Advice
Common questions in Cranford
Do you cover Cranford for sand mastic?
Yes, Cranford is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Can parking be tricky for a visit in Cranford?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
How long does sand mastic take to harden?
Not right away. It skins first and hardens fully later and we will give you an idea for your job.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
How much does sand mastic cost in Cranford?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email and tell us what needs doing and where.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What information do you need?
Tell us what needs doing and where, plus pictures if you have them. We’ll ask anything else we need to know.
For landlords and businesses
We also work for property managers and facilities teams in Cranford and across Greater London. Several sites can be quoted together.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
How we quote for sand mastic
We quote each job individually. These are the things that affect it:
- Whether the work is at height
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- Any mould that needs treating
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What to tell us for a quote
To make quoting easier, please include:
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Where the job is, and your postcode
- How we’d reach the joints
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear quote before any work starts.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Also in Cranford
Different surfaces, different methods
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
What sand mastic looks like in Cranford
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Osterley House (about 2.6 miles east) are a reminder that the area around Cranford has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For site and facilities teams at buildings such as Cranford Primary School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Hayes & Harlington station, older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around The Parish Church of the Good Shepherd, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Cranford is about 2 miles north of Feltham, in Greater London. If you need sand mastic in Cranford, please phone 0345 464 0079 or email us for a quick quote. We cover Greater London from our Crawley base. Cranford is one of 764 places in Greater London we cover. We also work in London, around 14 miles away.
Here we cover the TW4, TW5 and UB3 postcode area for sand mastic. Sand mastic is available to properties on Ely Road, Park Lane and The Avenue and the roads around them. Neighbouring places we cover for sand mastic include Hatton (1 mile south-west), Harlington (1 mile north-west), Heathrow (2 miles west), Feltham (2 miles south) and Sipson (2 miles north-west). Within a short drive, we also cover London (14 miles east), City of Westminster (11 miles east), Marylebone (12 miles east), Kensington (9 miles east), St Pancras (13 miles east) and Shoreditch (15 miles east).
Landmarks near Cranford
Locally, jobs take us to homes and businesses close to Cranford Community College, The Queen's Head pub and Hounslow Heath, among other places. Cranford’s nearest station is Hayes & Harlington station, about 1.9 miles north of the centre. Other landmarks nearby include Hounslow Hospital (1.6 miles east) and Treaty Centre (2 miles east). Open spaces near Cranford include Garden Lake and Northala Fields.
Why deal with it now?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall, 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 Cranford, the repair is bigger than a sealant job.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Why choose Mr Mastic in Cranford
- More than 20 years in sealant work
- Fully insured
- Arbo and Everbuild products
- Experience in homes, commercial sites and hotels
Read our cost guide and customer reviews.