Surrey · England
Window Mastic in Grafham
Professional window mastic in and around Grafham, with old sealant always removed completely.
- Cracked internal joints between frame and plaster
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
Grafham questions
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.
I let a flat near Chilworth station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Do you seal inside as well as outside?
Yes. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we’ll tell you.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Window mastic in Grafham, done properly
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. Typical jobs include damp patches on the reveal after heavy rain and hard, cracked sealant around windows, on timber windows & doors, composite doors and window sills.
Outdoor sealant needs dry, clean surfaces, so work on frames around Grafham is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Each job carries a 12-month guarantee.
- Location
- Grafham (GU5)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What else we do in Grafham
Should I try it myself first?
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.
The biggest DIY mistake is sealing over old sealant. 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.
What the job involves on each surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
Composite doors
A composite door normally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Leave it or put it right?
The work is quick compared with the damage it prevents: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. Older cottages and farmhouses around Grafham can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why book with us
- Quality sealants from Arbo and Everbuild
- We’re fully insured
- Tidy, careful work
- We never seal over old sealant
Read our cost guide and what customers say.
How to look after the new joints
A little care helps the new joints last. Our advice:
- Keep solvents and bleach off the sealant
- Keep jet washers away from the mastic
- Wipe condensation off the frames
- Walk round the house once a year and look at the joints
Most silicone sealants will not take paint, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Frames and glazing around Grafham
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. 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. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you let a flat or house near Chilworth station, renewing tired window mastic between tenants heads off draught and damp complaints.
Grafham is about 6 miles south of Guildford, in Surrey. Anywhere in GU5, we cover window mastic for homes and businesses. Grafham is one of 395 places in Surrey where we work. Our Crawley page covers work nearby, about 16 miles away.
Every address in GU5 is within our area for window mastic, from the main roads to the quietest streets. Other places close to Grafham include 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).
What’s near Grafham
We work in homes and buildings around Cucknell's Wood. The nearest railway station is Chilworth station, roughly 3.5 miles north. A little further out are Godalming Museum (3.6 miles north-west) and Guildford Castle (4.9 miles north). For a walk, there’s St Martha's Hill and Colyer's Hanger and Lower Lake.
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a few frames, or a day or more for a whole house. For a village or hamlet like Grafham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
Get a quote
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or email us.
Read more
What we can’t put right
A few problems are outside what sealant work can do:
- A sash or casement that will not close properly
- Damp problems in the wall away from the window
- Condensation trapped between the panes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
- Patio & French doors
- Composite doors
Common problems we fix in Grafham
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that cannot keep up eventually tears.
The problems people generally mention when they call are:
- Old mastic that has gone black or come away
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
- White mastic on grey or black frames
In the older streets around Church of St Andrew, the joint between an old wall and a newer frame is generally the first place rain gets in.
Before you book anyone
- Whether they seal over old material or remove it
- Whether the sealant suits the joint
- What guarantee comes with the work
- What preparation is included