Greater London · England
Sand mastic for sash & case windows in Hook, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Hook, with a 12-month guarantee on every job. Call for a quick quote.
- Window mastic to renew ahead of painting
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
About our sand mastic in Hook
We work across Hook renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We work on tenement windows, brick reveals and period & listed homes, and common reasons people get in touch are failed mastic on an exposed elevation and cement or filler used on old window joints that has cracked.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Hook (KT9, KT6, KT10)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
It helps to know what we cannot do too:
- Sashes that rattle, stick or won’t open
- Decisions on consent for listed homes
- Decayed frames that need repair
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Stone surrounds
- Tenement windows
- Brick reveals
- Sash and case windows
Hook homes and the weather
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Chessington North station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Hook is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Hook is about 2 miles north-west of Ewell, in Greater London. Whether you are in the middle of Hook or further out, we cover sand mastic for every kind of property. Across Greater London, we cover 764 places, Hook among them. You can also see our page for London, roughly 13 miles from Hook.
We work across KT9, KT6 and KT10 for sand mastic. Local streets include Elm Road, Moor Lane and Glen Road, all of which we cover. Hook is on the A243, which makes it straightforward to reach with everything needed for sand mastic. Neighbouring places we cover for sand mastic include Ditton Hill (1 mile north), Barwell (1 mile south-west), Long Ditton (1 mile north), Hinchley Wood (1 mile north-west) and Claygate (1 mile west). Further out, we also cover London (13 miles north-east), City of Westminster (12 miles north-east), Marylebone (12 miles north-east), Kensington (10 miles north-east), St Pancras (14 miles north-east) and Shoreditch (15 miles north-east).
Local landmarks in Hook
Around Hook, our work takes us to homes and buildings near Stokes Field, Shrewsbury House School and Southborough High School, among other places. There’s a railway station in Hook itself: Chessington North station. A little further out are The Ashley Centre (3 miles south-east) and Tolworth Hospital (1.1 miles north-east). Not far away are Kingston Hill Road area and The Lake.
How we quote for sand mastic
The quote reflects the job in front of us. We look at:
- The type of sealant required
- Whether the work is at height
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
The cost reflects the work involved, not guesswork. That is why we ask about the job first and agree the price before starting.
Asking for a quote
When you call or email, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
- Where the property is
- Whether it’s a home or a business
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Different surfaces, different methods
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. We rake it out and renew it.
Questions from Hook
Can you help a landlord with a rental near Chessington North station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Can parking be tricky for a visit in Hook?
Parking in Hook, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you cover Hook?
We do. Hook is part of the area we cover, and the service is the same as everywhere else.
Can old silicone round a sash window be swapped for sand mastic?
In most cases. We remove the silicone and clean the joint before the sand mastic goes in.
Do you offer different sealant colours?
We will suggest a colour to suit the surroundings, from white and clear to greys and other shades. The product needed can limit the range.
How long does sand mastic take to harden?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
How long does sand mastic take?
Most jobs take a few hours per window, depending on the condition of the joints. Your quote will say how long we expect yours to take.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Landlords, agents and businesses in Hook
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
What happens on the day
Good joint work is mostly 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 per window, depending on the condition of the joints. For a job in Hook, 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.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
- Move anything stored near the joints
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details.
Related advice
Can I do it myself?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Do you need sand mastic in Hook?
Timber swells and shrinks with the weather. That movement opens up the mastic joint over time.
The most common problems we see are:
- Failed mastic on an exposed elevation
- Open joints round the window box
- Wind and rain getting in round a sash window
- Old cement repairs round a window that have failed
Schools such as St Paul's CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
- How the colour is chosen
- What happens if they find a problem under the old sealant