Greater London · England
Window & door mastic in Yiewsley, Greater London
Professional window mastic in and around Yiewsley, with old sealant always removed completely and a one-year guarantee.
- Rushed sealant from a window installation
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
How we quote for window mastic
The price is agreed before any work begins. It’s based on:
- Working hours on commercial sites
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- What’s wrong with the joints now
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved.
Window mastic in Yiewsley, done properly
Frames and walls do not move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. If you have cracked or shrunken mastic around the frame and cracked sealant at the sill ends, we can help.
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.
All our work comes with a 12-month guarantee, wherever you are in Greater London.
- Where
- Yiewsley (UB7, UB8)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Yiewsley
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Places near Yiewsley
Also in Yiewsley
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Questions from Yiewsley
Can parking be tricky for a visit in Yiewsley?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Can you help a landlord with a rental near West Drayton station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Do you guarantee window mastic?
Yes, with our 12-month guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Common problems we fix in Yiewsley
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
Most people get in touch after spotting one of these:
- Damp patches on the reveal after heavy rain
- Mastic that’s falling out in pieces
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
For an older house near a landmark such as St Matthew's, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- What guarantee comes with the work
- Who does the work, and how experienced they are
- What happens if the job turns out different
- When the joint can take water or movement
How to look after the new joints
After the cure time, these simple habits help:
- Wipe condensation off the frames
- Wash the frames with mild soapy water
- Walk round the house once a year and look at the joints
- Keep jet washers away from the mastic
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
What happens on the day
At the end, we look at the finished work together and explain the cure time. The visit itself generally takes a few hours for a handful of frames, longer for a whole house, depending on the amount of work. For a job in Yiewsley, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
How to prepare
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
- Keep pets and children clear of the area while we work
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Advice
Why it’s worth doing now in Yiewsley
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Yiewsley, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, 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, and we’ll explain the quote if you ask.
Why Yiewsley customers choose us
- We’re fully insured
- Sanitary silicone with an anti-fungal additive in wet areas
- ARBOMaster approved applicator
- Colour agreed with you before any work starts
Read what affects the cost or our reviews.
Yiewsley homes and the weather
Historic houses like Ickenham Hall (about 3.3 miles north) are a reminder that the area around Yiewsley has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. In a converted house or block, who looks after the windows depends on the lease, so check that before you book.
Schools such as Rabbsfarm Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near West Drayton station, renewing tired window mastic between tenants heads off draught and damp complaints.
Yiewsley is about 2 miles south-west of Hillingdon, in Greater London. Jobs in Yiewsley get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Yiewsley is one of 764 towns and villages in Greater London we cover. For nearby work, see our London page (16 miles or so).
We work across UB7 and UB8 for window mastic. Window mastic is available to properties on High Street, Castle Avenue and Kingston Avenue and the roads around them. With the A408 close by, Yiewsley is easy for our applicators to reach for window mastic. We also cover the places around Yiewsley: West Drayton (1 mile south), Cowley (1 mile north-west), Thorney (1 mile south-west), Hillingdon (2 miles north-east) and Uxbridge (2 miles north). Larger places within reach include City of Westminster (13 miles east), Marylebone (14 miles east), Kensington (11 miles east), St Pancras (15 miles east), Hampstead (13 miles east) and Ruislip (5 miles north-east).
Landmarks near Yiewsley
In Yiewsley, that means homes and buildings near Stockley Academy, Lake Farm Country Park and George and Dragon pub, among other places. For rail, the closest station is West Drayton station, about 0.5 miles south-west. A little further out are Hillingdon Hospital (0.7 miles north) and The Chimes (2.1 miles north). Not far away are Uxbridge Moor and Staines Reservoirs.