Greater London · England
Holland Park Window Mastic
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Holland Park. Fully insured, ARBOMaster approved and guaranteed for a year.
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- Mastic that has split away from the wall
What sealant work can’t fix
Sealant is not the answer to every problem, and we’ll tell you before we start. It won’t solve:
- Soft or decayed wood in the frame
- Condensation trapped between the panes
- Faulty window hardware
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Patio & French doors
- uPVC windows
- Aluminium frames
- Timber windows & doors
- Window sills
- Composite doors
About our window mastic in Holland Park
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. We are often asked to deal with mastic that has split away from the wall and draughts coming in around windows and doors, across aluminium frames, composite doors and uPVC windows.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Holland Park is something to talk through when you book.
We stand behind the work with a one-year guarantee.
- Where
- Holland Park (W8, W11, W14)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- Neat joints and a tidy finish
- Rated 4.9 stars on Google
- Homes, businesses and hotels
- Anti-fungal silicone where joints get wet
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Look round the frames every year or so
- Paint up to the joint, not over it
- Repaint timber before it’s bare
- Avoid harsh chemicals near the mastic
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
What window mastic looks like in Holland Park
Historic houses like Leighton House (about 0.4 miles south) are a reminder that the area around Holland 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.
If you live in an older home near Church of St George, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Holland Park School? Then its window and door frames need their mastic kept sound, just like a home’s.
Holland Park is about 1 mile north of Kensington, in Greater London. Homes, rented property, offices and hotels in Holland Park can book us for window mastic. The work is guaranteed for a year. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Every address in W8, W11 and W14 is covered for window mastic, from the main roads to the quietest streets. You’ll find streets such as Dukes Lane, Milson Road and Elsham Road, all of which we cover. You will find Holland Park on the A402 and A4204, which makes it straightforward to reach. Close by, we work in Kensington (1 mile south), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). We also work in nearby towns such as London (5 miles east), Marylebone (3 miles east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles east).
Around Holland Park
We work in homes and buildings around Kensington Palace Green, Abdus Salam Library and Windsor Castle in Kensington pub. Nearby too are Kensington School (0.6 miles south-east) and Fox Primary School (under half a mile north-east). The closest station to Holland Park is Kensington Olympia station, about 0.5 miles south-west of the centre. Nearby you will also find London Museum (0.7 miles east) and St Mary Abbot's Hospital (0.7 miles south-east). Open spaces near Holland Park include Campden Hill and WWT London Wetland Centre.
What happens on the day
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a handful of frames, longer for a whole house. In Holland Park, 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 check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Tell us about any water getting in
- Mention any tricky access
- Clear the area around the work
Ask for a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.
Related advice
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much old sealant there is and how hard it is to remove
- Which sealant suits the joint
- How much there is to do
- Mould in or behind the old joints
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- If someone has resealed it before
- Where the job is, and your postcode
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or drop us an email and describe the job.
Towns and villages near Holland Park
More services for Holland Park
Landlords, agents and businesses in Holland Park
For anyone letting property in or around Holland Park, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What we’re called out for in Holland Park
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Cracked internal joints between frame and plaster
- Leaking joints at the ends of sills
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Letting a property close to Kensington Olympia station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before booking
- Whether VAT is included
- Which colour the sealant will be
- What guarantee comes with the work
- What product goes in the joint
Holland Park: your questions answered
Can you do window mastic in Holland Park?
Yes, Holland Park is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
Can you help a landlord with a rental near Kensington Olympia station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Will there be a smell?
There can be a smell while the sealant cures. Opening a window helps.
Do you have sealant for grey or black windows?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can you reach windows above the ground floor?
Yes, in most cases. We plan safe access before the job.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.