Greater London · England
Sand Mastic in Bayswater
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Bayswater. Fully insured, ARBOMaster approved and guaranteed for a year.
- Silicone on a period window that looks wrong
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
When something else is needed
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Stone surrounds
- Sash and case windows
- Tenement windows
- Period & listed homes
- Timber door frames
How we handle sand mastic in Bayswater
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice and we can swap the silicone for it. Typical jobs include cracked mastic round a front door frame and mastic worn away on windows facing the weather, on timber door frames, tenement windows and brick reveals.
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.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Bayswater (W2, W8, W11)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Bayswater
Is Bayswater in your area for sand mastic?
Yes, Bayswater is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Is parking a problem for a job in Bayswater?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
I rent my home. Can I book you?
Of course. Check with your landlord; we can send the quote to them too.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
What should I tell you?
Let us know what needs doing and where, plus pictures if you have them. We’ll ask anything else we need to know.
Quotes for sand mastic in Bayswater
The price is agreed before any work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- The number and length of the joints
- Whether the work is at height
- Any mould that needs treating
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Pictures of the joints, sent by email
- If someone has resealed it before
- The address or postcode of the job
- The type of property
For sand mastic in Bayswater, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Period and listed homes
Period homes look their best with traditional materials.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a single window, longer for several, and the area is left clean. In Bayswater, 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 the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us about any water getting in
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear price.
Related advice
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Leave the new mastic unpainted
- Look over the window mastic once a year
- Keep sills and gutters clear so water drains away
- Take care around the mastic when scraping paint
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Why it’s worth doing now in Bayswater
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What it costs depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why us?
- Fully insured
- Rated 4.9 stars on Google
- We leave the area clean and tidy
- ARBOMaster approved applicator
See how sealant jobs are priced and our reviews.
What sand mastic looks like in Bayswater
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book.
Bayswater is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you live in an older home near Essex Street Chapel, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Schools such as Fox Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Bayswater is about 1 mile north-east of Kensington, in Greater London. If you need sand mastic in Bayswater, please phone 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base, Bayswater included. Bayswater is one of 764 towns and villages in Greater London we cover for sand mastic.
Postcode districts we cover here for sand mastic: W2, W8 and W11. That includes homes and businesses on Dukes Lane, Salem Road and Aubrey Road. Bayswater sits on or near the A4204 and A4206. Neighbouring places we cover for sand mastic include Westbourne (1 mile north), Westbourne Green (1 mile north), Little Venice (1 mile north-east), Paddington (1 mile north-east) and Paddington Green (1 mile north-east). Within a short drive, we also cover London (4 miles east), St Pancras (3 miles east), Shoreditch (5 miles east), Walthamstow (9 miles north-east), Hoxton (5 miles east) and Whitechapel (5 miles east).
Near you in Bayswater
We work in homes and buildings around Kensington Palace Green, Abdus Salam Library and Kensington School. Nearby too are Lansdowne College (under half a mile north-east) and The Churchill Arms (under half a mile south). Bayswater’s nearest station is London Paddington station, roughly 0.9 miles north-east. A little further out are St Mary Abbot's Hospital (0.8 miles south) and Montfichet's Tower (3.9 miles east). Green spaces nearby include Greville Place nature reserve and The Long Water.