Surrey · England
Frensham Sand Mastic
Sand mastic in Frensham from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
- Mastic round period door frames that has failed
Frames and glazing around Frensham
With historic houses such as Farnham Castle (about 3.6 miles north) nearby, there’s older building stock in the area around Frensham as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Farnham station, any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as St Mary's CofE Aided Infant School, the mastic around its windows and doors needs looking after like any other building’s.
Frensham is about 3 miles south of Farnham, in Surrey. If you need sand mastic in Frensham, please ring 0345 464 0079 or email us for a quick quote. We cover Surrey from our Crawley base, Frensham included. Our area takes in 395 places across Surrey. There’s also a page for Reading, about 21 miles away.
Here we cover the GU10 postcode area for sand mastic. Whether your property is on The Street and Peakfield or a nearby road, we can help. Close by, we work in Millbridge (1 mile north), Shortfield Common (1 mile north), Crosswater (1 mile south-east), Tilford Reeds (2 miles north-east) and Tilford Common (2 miles east). We also work in nearby towns such as Guildford (11 miles north-east), Woking (14 miles north-east), Camberley (12 miles north), Farnham (3 miles north), Frimley (11 miles north) and Haslemere (6 miles south-east).
Near you in Frensham
Locally, jobs take us to homes and businesses close to The Flashes and Edgeborough School and the streets around them. The closest station to Frensham is Farnham station, about 3.2 miles north. A little further out are Farnham Castle (3.6 miles north) and Museum of Farnham (3.3 miles north). Open spaces near Frensham include Culverswell Hill and Farnham Heath.
How we handle sand mastic in Frensham
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. We’re often asked to deal with open joints round the window box and cement or filler used on old window joints that has cracked, on timber door frames, brick reveals and period & listed homes.
Around Frensham, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Your job is guaranteed for a year, as with all our work.
- Location
- Frensham (GU10)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Frensham
What else we do in Frensham
Frensham questions
Can you help a landlord with a rental near Farnham station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Is Frensham within the area you cover?
Yes, Frensham is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Do the sealants smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Can I do it myself?
A DIY attempt does not rule out a professional job. We cut it out and start again.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we do, step by step
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work starts. Most jobs take a few hours for a single window, longer for several. Somewhere as small as Frensham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Tell us about any water getting in
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work.
Read more
What affects the cost of sand mastic
There’s no set price list. What we look at:
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- Which sealant suits the joint
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- The type of property
- If someone has resealed it before
- Photos by email, if that’s easy
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Don’t paint over the new mastic
- Avoid heavy scraping on the mastic joint
- Plan mastic work ahead of painting
- Keep sills and gutters clear so water drains away
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
What we can’t put right
In fairness, some problems need a different trade:
- Decayed frames that need repair
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
If you’re not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
What we seal
- Timber door frames
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
How the job changes by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
What we’re called out for in Frensham
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Common reasons people contact us include:
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
- Crumbling sand mastic round a window
- Cement or filler used on old window joints that has cracked
If you live in an older home near Church of St Mary the Virgin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before you book anyone
- Whether you can choose the colour
- What the cure time is
- What happens if they find a problem under the old sealant
- The length of the guarantee