Greater London · England
Window & door mastic in Hounslow, Greater London
Problem with your window and door frames in Hounslow? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Old mastic that has gone black or come away
- Mastic that has split away from the wall
- Cracked sealant at the sill ends
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Do not paint over the silicone
- Air rooms to keep condensation down around windows
- Keep drainage slots and sill grooves clear
- Use gentle cleaners on frames and sealant
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
About our window mastic in Hounslow
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. Common call-outs are for mastic that’s falling out in pieces and leaking joints at the ends of sills, across patio & French doors, composite doors and timber windows & doors.
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, in Hounslow as anywhere.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Place
- Hounslow (TW3, TW7, TW2)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need window mastic in Hounslow
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. A sealant that cannot keep up eventually tears.
Signs it’s time to call us include:
- A bead that doesn’t match the frame
- Water coming in at the bottom corners of a door
- Rushed sealant from a window installation
- Gaps between the frame and the inside reveal
As a London address, Hounslow can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- How the colour is chosen
- What happens if the job turns out different
- Is VAT in the price?
- Is the old sealant removed completely?
Common questions in Hounslow
Can parking be tricky for a visit in Hounslow?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
I let a flat near Hounslow station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Do you come to Hounslow?
Yes. We cover Hounslow. To book, phone 0345 464 0079 or drop us an email.
Can new window sealant be painted?
Not usually, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you do the inside joint as well?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we are fully insured.
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about stairs, lifts or work at height
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work and give you a clear quote.
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Quotes for window mastic in Hounslow
We do not publish a price list, because jobs vary so much. The quote depends on:
- Any working-time requirements on site
- How many areas need sealing
- Mould in or behind the old joints
- Whether the work is at height
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Helping us quote
What to tell us when you ask for a quote:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Where the job is, and your postcode
We do not publish a price list, because every job is different. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Window mastic in Hounslow: local notes
Historic houses like Osterley House (about 1.6 miles north) are a reminder that the area around Hounslow 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. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
If you look after a building such as Chatsworth Primary School, its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Hounslow station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Hounslow is about 9 miles west of City of Westminster, in Greater London. Homes, rented property, offices and hotels in Hounslow can book us for window mastic, old or new, large or small. The work is guaranteed for a year. We cover 764 towns and villages across Greater London, from the larger towns to small villages. Our London page covers work nearby.
Postcode districts we cover here for window mastic: TW3, TW7 and TW2. Window mastic is available to properties on New Road, Ivy Road and Bell Road. Close by, we work in Woodlands (1 mile north-east), Ivybridge (1 mile south-east), Lampton (1 mile north-west), Isleworth (1 mile east) and Spring Grove (1 mile north). Further out, we also cover London (11 miles east), City of Westminster (9 miles east), Marylebone (9 miles east), Kensington (7 miles east), St Pancras (11 miles east) and Shoreditch (12 miles east).
Landmarks near Hounslow
Locally, jobs take us to homes and businesses close to Moon Under Water pub, Kingsley Academy and Inwood Park. For rail, the closest station is Hounslow station, roughly 0.6 miles south-west of the centre. Nearby you’ll also find Museum of Army Music (0.8 miles south) and South Middlesex Hospital (0.9 miles south-east). For a walk, there’s Garden Lake and Richmond Hill.
Landlord and commercial work in Hounslow
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Why act early in Hounslow
Not every sealant suits a window. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler for homes in Hounslow.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
- 12-month guarantee on every job
- 180+ five-star Google reviews
Take a look at what affects the cost and customer reviews.
What the job involves on each surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.