Surrey · England
Window Mastic in Lower Bourne
Mastic around window and door frames, sills and patio doors for Lower Bourne, backed by a one-year guarantee. Call for a quick quote.
- Mastic that’s falling out in pieces
- Gaps left after new windows were fitted
- Leaking joints at the ends of sills
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Window mastic in Lower Bourne, done properly
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. If you have whistling draughts around closed windows and leaking joints at the ends of sills, we can help.
Many houses in smaller places like Lower Bourne have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Lower Bourne (GU10, GU9)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
How it works
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a few frames, or a day or more for a whole house, depending on how much there is to do. Parking around Lower Bourne is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Keep children and pets away from the work area
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
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Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Aluminium frames
- Window sills
- Timber windows & doors
- uPVC windows
- Composite doors
- Patio & French doors
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. In a smaller place like Lower Bourne, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why Lower Bourne customers choose us
- A choice of colours where the product allows
- You choose the colour before work begins
- More than 20 years in sealant work
- Trusted Arbo and Everbuild sealants
Take a look at our cost guide or our reviews.
Lower Bourne: your questions answered
Is Lower Bourne in your area for window mastic?
Yes. We work across London and the South East, and Lower Bourne is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Will you come out to Lower Bourne?
Yes, Lower Bourne is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit, while a whole house takes longer. We confirm the timing with your quote.
Is it OK to seal over old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Where are you based?
Mr Mastic is based in Crawley. We cover Lower Bourne and the rest of Surrey, along with the rest of our area.
Can you quote for more than one area?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What affects the quote in Lower Bourne
For a quick quote, just ask. The main things that affect it are:
- Any mould that needs treating
- Any working-time requirements on site
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
You do not need to know the technical terms. Just tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- Whether it’s a home or a business
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
What window mastic looks like in Lower Bourne
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Farnham Castle (about 1.6 miles north) nearby, there’s older building stock in the area around Lower Bourne as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Farnham College are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Farnham station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Lower Bourne is about 1 mile south of Farnham, in Surrey. We carry out window mastic for homes and businesses in Lower Bourne, as part of our work across Surrey. 395 places in Surrey are on our list, from the larger towns to small villages. Our Reading page covers work nearby, about 19 miles away.
Work in GU10 and GU9 works the same way as everywhere else we cover. If you need window mastic at a property on Fox Road, Ford Lane and Kiln Lane or a nearby road, our applicators can take on the job. Being close to the A287, Lower Bourne is simple for us to get to for window mastic. Close by, we work in Tilford Reeds (1 mile south-east), Shortfield Common (1 mile south), Millbridge (2 miles south), Tilford (2 miles east) and Frensham (2 miles south). Within a short drive, we also cover Guildford (10 miles east), Woking (12 miles north-east), Camberley (10 miles north), Frimley (8 miles north), Haslemere (8 miles south) and Cranleigh (14 miles east).
Near you in Lower Bourne
We work in homes and buildings around Underdown nature reserve, Highfield South Farnham School and The Fox Public House and the streets around them. The nearest railway station is Farnham station, about 1.1 miles north of the centre. Well-known places in the area include Museum of Farnham (1.3 miles north-west) and Farnham Castle (1.6 miles north). The countryside around Lower Bourne includes Culverswell Hill and Aunt's Pool.
Do you need window mastic in Lower Bourne?
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Signs it’s time to call us include:
- Draughts coming in around windows and doors
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
- Cracked internal joints between frame and plaster
For an older house near a landmark such as St Martin by the Green, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before booking
- How the joint is cleaned and prepared
- Are they insured?
- Who does the work, and how experienced they are
- What guarantee comes with the work