Surrey · England
Sand mastic for sash & case windows in Old Dean, Surrey
Window and door surrounds in Old Dean need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic that needs renewing before redecorating
- Cement or filler used on old window joints that has cracked
- Modern sealant on a period surround
When it is not the sealant
We will not take on work that will not last, so these are the limits:
- Putty and glazing repairs
- Timber that has rotted
- Whether work needs listed building consent
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Where we work in Old Dean
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Tenement windows
- Brick reveals
Sand mastic in Old Dean
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on timber door frames, brick reveals and stone surrounds, and people most often call us about modern sealant on a period surround and wind and rain getting in round a sash window.
Many houses in smaller places like Old Dean have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows.
There’s a 12-month guarantee on every job.
- Location
- Old Dean (GU15, GU19)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Old Dean, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved.
Advice
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Don’t run silicone over sand mastic
- Take care around the mastic when scraping paint
- Clear gutters so water doesn’t pour onto the windows
- Ask the planning authority about consent for listed or conservation-area homes
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Different surfaces, different methods
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Leave it or put it right?
Draughts round a sash window are not always the sashes. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. Around Old Dean, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Combining jobs into one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Why book with us
- We leave the area clean and tidy
- ARBOMaster approved applicator
- Homes, businesses and hotels
- Anti-fungal sanitary silicone in wet areas
See what affects the cost and what customers say.
Windows and doors in Old Dean
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Camberley station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Collingwood College, larger buildings have plenty of frames, and the mastic around each one ages.
Old Dean is about 1 mile north-east of Camberley, in Surrey. Old Dean gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Old Dean is one of 395 places in Surrey where we work for sand mastic. For nearby work, see our Reading page, about 13 miles away.
Work in GU15 and GU19 works the same way as everywhere else we cover. Whether your property is on Esher Road, Gibbet Lane and Sutton Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out sand mastic in Camberley (1 mile south-west), York Town (2 miles south-west), Frimley (3 miles south), College Town (3 miles west) and Watchmoor (3 miles south-west). Larger places within reach include Guildford (9 miles south-east), Woking (7 miles east), Farnham (10 miles south), Egham (9 miles north-east), Walton-on-Thames (14 miles east) and Staines-upon-Thames (11 miles north-east).
Near you in Old Dean
Locally, jobs take us to homes and businesses close to Pine Ridge Infant School, Poors Allotment and Jolly Farmer pub, among other places. The closest station to Old Dean is Camberley station, about 1.5 miles south-west of the centre. Nearby you will also find Frimley Park Hospital (2.4 miles south-west) and Surrey Heath Museum (1.4 miles south-west). Open spaces near Old Dean include Heath Lake and Wildmoor Heath.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
When to call us in Old Dean
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
People normally contact us after spotting something like this:
- Mastic that needs renewing before redecorating
- Silicone on a period window that looks wrong
- Open joints round the window box
- Patchy fillers round a sash window
Homes close to St Martin's Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- What insurance they hold
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
- What guarantee comes with the work
More services for Old Dean
Old Dean: your questions answered
Can you help a landlord with a rental near Camberley station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you do sand mastic in Old Dean?
Yes, Old Dean is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
How long does the job take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Where do you work from?
Mr Mastic is based in Crawley. We cover Old Dean and the rest of Surrey.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The product needed can limit the range.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.