Surrey · England
Great Bookham Window Mastic
Professional window mastic in and around Great Bookham, with old sealant always removed completely.
- White mastic on grey or black frames
- Gaps left after new windows were fitted
- Gaps between the frame and the inside reveal
Window mastic in Great Bookham
Over two decades of sealing frames has taught us which products suit which walls. We are ARBOMaster approved and fully insured, and we give a one-year guarantee on the work. If you have whistling draughts around closed windows and black, perished sealant on frames, we can put it right, whatever the surface.
Homes around Great Bookham range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
Each job carries a 12-month guarantee.
- Where
- Great Bookham (KT23, KT22)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
In fairness, there are a few things sealant won’t fix:
- Damp coming through the wall itself rather than the frame joint
- Draughts through the window seals rather than the frame
- Rotten timber, which needs a joiner first
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before booking.
Where we work in Great Bookham
- Window sills
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
What happens if it’s left?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic normally deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we will say so. In a smaller place like Great Bookham, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
What you pay reflects the work, not guesswork. That is why we ask about the job first and agree the price before starting.
Why book with us
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
- A choice of colours where the product allows
- Tidy, careful work
See what affects the cost or our reviews.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we are called out for in Great Bookham
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Most people get in touch after spotting something like this:
- Cracked sealant at the sill ends
- A bead that doesn’t match the frame
- Draughts coming in around windows and doors
- Old mastic that has gone black or come away
Letting a property close to Bookham station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before you book
- Is VAT in the price?
- How long to leave it before use
- How the colour is chosen
- How the joint is cleaned and prepared
Great Bookham questions
Do you cover smaller places like Great Bookham?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Great Bookham in your area for window mastic?
Yes. Our work covers London and the South East, and Great Bookham is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
How much does window mastic cost in Great Bookham?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What we do, step by step
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. Most jobs take a morning for a couple of windows and a door. In a smaller place like Great Bookham, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Let us know about stairs, lifts or work at height
- Clear the area around the work
- Tell us if parking is tricky
Getting a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
Surface by surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match keeps the clean look.
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Frames and glazing around Great Bookham
London and the South East are among 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 Polesden Lacey (about 1.6 miles south) nearby, there’s older building stock in the area around Great Bookham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of St Nicolas, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as The Dawnay School, its window and door frames need their mastic kept sound, just like a home’s.
Great Bookham is about 6 miles south-west of Epsom, in Surrey. Great Bookham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 395 places across Surrey. We also work in Crawley, around 14 miles away.
Here we cover the KT23 and KT22 postcode area for window mastic. Window mastic is available to properties on High Street, Church Road and Beeches Drive and the roads around them. Neighbouring places we cover for window mastic include Fetcham (1 mile north-east), Little Bookham (1 mile south-west), Leatherhead (2 miles north-east), Mickleham (2 miles east) and Westhumble (3 miles south-east). We also work in nearby towns such as Guildford (9 miles west), Woking (9 miles west), Epsom (6 miles north-east), Horley (11 miles south-east), Redhill (9 miles east) and Ewell (7 miles north-east).
What’s near Great Bookham
In Great Bookham, that means homes and buildings near Howard of Effingham School, Manor House School and The Old Crown pub. The closest station to Great Bookham is Bookham station, roughly 0.8 miles north-west. Well-known places in the area include Headley Court (4.1 miles east) and Betchworth Castle (4.4 miles south-east). Green spaces nearby include Box Hill and Jubilee Wood.
Nearby places to Great Bookham
Other services in Great Bookham
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Avoid blasting the frames with a pressure washer
- Keep timber frames painted
- Make sure the drainage slots are not blocked
- Ventilate rooms so frames don’t stay wet inside
Silicone can’t normally be painted, so if you are planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.