Greater London · England
Dollis Hill Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Dollis Hill, with a one-year guarantee on every job. Ask us for a quote.
- Gaps where the frame meets the masonry
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
Windows and doors in Dollis Hill
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Brent Cross West station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Church of St Michael include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Dollis Hill is about 1 mile north-east of Neasden, in Greater London. From the centre of Dollis Hill to the outskirts, we cover sand mastic for every kind of property. Dollis Hill is one of 764 places in Greater London we cover for sand mastic. We also work in London, around 7 miles away.
We cover every part of NW2, NW10 and NW9 for sand mastic and the streets around it. That includes homes and businesses on Brook Road, Lane Close and Crest Road. Other places close to Dollis Hill include Staples Corner (1 mile north-east), Neasden (1 mile south-west), Cricklewood (1 mile south-east), Willesden (1 mile south) and Brent Cross (1 mile north-east). Within a short drive, we also cover London (7 miles south-east), City of Westminster (5 miles south-east), Marylebone (5 miles south-east), Kensington (5 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles east).
Landmarks near Dollis Hill
Locally, jobs take us to homes and businesses close to Woodfield School, The Crown Public House and Gladstone Park. There’s a railway station in Dollis Hill itself: Brent Cross West station. Other landmarks nearby include Brent Cross Shopping Centre (1 mile north-east) and St Andrew's Hospital (less than half a mile south). Green spaces nearby include Darland's Lake and Parliament Hill.
About our sand mastic in Dollis Hill
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. Typical jobs include gaps between timber frames and stone or brick and old cement repairs round a window that have failed, across stone surrounds, brick reveals and tenement windows.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Dollis Hill.
You get a 12-month guarantee, the same in Dollis Hill as everywhere else we work.
- Location
- Dollis Hill (NW2, NW10, NW9)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Dollis Hill
Can you do sand mastic in Dollis Hill?
Yes, Dollis Hill is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
I let a flat near Brent Cross West station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Like-for-like sand mastic is often the preferred finish but the decision is theirs.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
How long will you be here?
That depends on the amount of work, but as a guide it takes a few hours for a single window, longer for several. We’ll tell you when we quote.
What we can’t put right
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Decayed frames that need repair
- Cracked or broken glass
- Sashes that need overhauling
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Dollis Hill
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
- Timber door frames
What affects the quote in Dollis Hill
There’s no set price list, because jobs vary so much. What we look at:
- The old material and how stubborn it is
- Mould in or behind the old joints
- When we can work, for business premises
- Access and height
What you pay reflects the work, not guesswork. That’s why we ask about the job first and send you a clear quote before we start.
What we need to know
There’s no need for technical detail. Just tell us:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- Whether it has been sealed before
For sand mastic in Dollis Hill, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before we start.
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Dollis Hill
- We never seal over old sealant
- We are fully insured
- An ARBOMaster approved applicator
- One-year guarantee on every job
Read what affects the cost or our reviews.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Towns and villages near Dollis Hill
Other services in Dollis Hill
Signs you need sand mastic in Dollis Hill
Age is the main cause. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
Keep an eye out for these signs:
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
- Weathered mastic on the most exposed windows
As a London address, Dollis Hill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Before you book anyone
- Whether they seal over old material or remove it
- How long to leave it before use
- Is VAT in the price?
- Are they insured?
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How the visit works
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours per window, depending on the condition of the joints. In Dollis Hill, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
- Keep children and pets away from the work area
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.