Surrey · England
Sand mastic for sash & case windows in Grafham, Surrey
Sand mastic in Grafham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked mastic round a front door frame
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Sand mastic for homes and businesses in Grafham
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. We work on period & listed homes, brick reveals and sash and case windows, and the jobs we see most are mastic dropping out of the joint and gaps where the frame meets the masonry.
Outdoor sealant needs dry, clean surfaces, so work on frames around Grafham is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Grafham (GU5)
- Region
- Surrey
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Grafham
Will you come out to Grafham?
Yes. Grafham is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Chilworth station?
Yes. We work for landlords and agents as well as householders, 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’ll give you a clear quote.
How do I get a quote for sand mastic in Grafham?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email and let us know what needs doing and where.
Should I use sand mastic or silicone?
That depends on your windows. Period windows in stone or brick generally suit sand mastic and newer frames generally get a flexible sealant.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area.
When something else is needed
To be straight with you, some problems need a different trade:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Decayed frames that need repair
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
What we do, step by step
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. Somewhere like Grafham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.
Related advice
Why deal with it now?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. Around Grafham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why Grafham customers choose us
- Approved under the ARBOMaster scheme
- More than 20 years in sealant work
- Neat joints and a tidy finish
- Every job guaranteed for a year
Read what affects the cost and what customers say.
When to call us in Grafham
Rain on the window surround works into any crack and loosens it further. Exposed elevations usually fail first.
These are the problems we’re asked about most:
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Cracked mastic round a front door frame
- Gaps where the frame meets the masonry
Rented homes near Chilworth station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Comparing quotes
- How hidden problems are handled
- How much experience the applicator has
- Are they insured?
- Is the old sealant removed completely?
Nearby places to Grafham
Other services in Grafham
Landlords, agents and businesses in Grafham
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What affects the cost of sand mastic
Call for a quick quote. The main things that affect it are:
- The amount of work
- The type of sealant required
- Whether the work is at height
- Whether there’s mould to deal with
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Asking for a quote
What to tell us when you ask for a quote:
- How we’d reach the joints
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- The address or postcode of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.
Sand mastic in Grafham: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Chilworth Manor (about 3.8 miles north) nearby, there’s older building stock in the area around Grafham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Andrew, the joint between an old wall and a newer frame is usually the first place rain gets in.
Grafham is about 6 miles south of Guildford, in Surrey. Grafham gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Grafham is one of 395 towns and villages in Surrey we cover. We also work in Crawley, about 16 miles from Grafham.
Our applicators cover all of the GU5 postcode area for sand mastic. We also cover the places around Grafham: Birtley Green (1 mile north), Shamley Green (1 mile north), Thorncombe Street (1 mile west), Stroud Common (1 mile north-east) and Rowly (2 miles east). Within a short drive, we also cover Guildford (6 miles north), Woking (11 miles north), Camberley (14 miles north-west), Farnham (11 miles west), Reigate (15 miles east) and Dorking (10 miles north-east).
Landmarks near Grafham
Around Grafham, our work takes us to homes and buildings near Cucknell's Wood, among other places. The nearest railway station is Chilworth station, about 3.5 miles north. A little further out are Godalming Museum (3.6 miles north-west) and Guildford Castle (4.9 miles north). Green spaces nearby include St Martha's Hill and Colyer's Hanger and Lower Lake.