Hampshire · England
Deadwater Window Mastic
Window mastic in Deadwater from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rushed sealant from a window installation
- Cold air getting in at the frame edge
- Cracked or shrunken mastic around the frame
Surface by surface
Composite doors
A composite door generally sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
Window mastic in Deadwater, done properly
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. Where the air is getting in through the window itself, we’ll say so. If you have draughty joints inside around the window and black, perished sealant on frames, we can put it right, whatever the surface.
Houses in smaller places like Deadwater can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
You get a one-year guarantee, the same in Deadwater as everywhere else we work.
- Where
- Deadwater (GU35)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What window mastic looks like in Deadwater
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St Mark's Sacred Church, the joint between an old wall and a newer frame is normally the first place rain gets in. For landlords with property near Liphook station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Deadwater is about 1 mile east of Bordon, in Hampshire. Homes, rented property, offices and hotels in Deadwater can book us for window mastic. The work is guaranteed for a year. 683 places in Hampshire are on our list, large and small. Portsmouth is on our list too, around 23 miles away.
Jobs for window mastic in GU35 works the same way as everywhere else we cover. You will find streets such as Alma Road, Varna Road and Rowan Road. Other places close to Deadwater include Lindford (1 mile north-east), Bordon (1 mile west), Hollywater (1 mile south), Standford (1 mile south-east) and Pinewood Village (1 mile north-west). Larger places within reach include Basingstoke (15 miles north-west), Farnborough (13 miles north), Fleet (11 miles north), Aldershot (10 miles north-east), Alton (6 miles north-west) and Petersfield (8 miles south-west).
Landmarks near Deadwater
Around Deadwater, our work takes us to homes and buildings near Weyford Nursery and Primary School and the streets around them. Deadwater’s nearest station is Liphook station, roughly 3.6 miles south-east. Nearby you’ll also find Chase Community Hospital (0.7 miles south-west). For a walk, there’s Deadwater Valley and Selborne Hill.
Your questions about window mastic in Deadwater
Do you work for landlords with property near Liphook station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Will you come out to Deadwater?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How do I get a quote for window mastic in Deadwater?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or send us an email with a short description of the job.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Can you do upstairs windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
When it isn’t the sealant
It helps to know what we cannot do too:
- A failed sealed unit that has misted up
- Draughts through the window seals rather than the frame
- A sash or casement that won’t close properly
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Aluminium frames
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
- Composite doors
Also near Deadwater
More services for Deadwater
Common problems we fix in Deadwater
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. If the sealant cannot stretch, it splits.
The most common problems we see are:
- Cracked sealant at the sill ends
- Black, perished sealant on frames
- White mastic on grey or black frames
- Hard, cracked sealant around windows
If you look after a building such as Mill Chase Academy, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- Who does the work, and how experienced they are
- What the cure time is
- What guarantee comes with the work
- How the joint is cleaned and prepared
What affects the cost of window mastic
We quote each job individually. This is what makes a difference:
- How many areas need sealing
- The old material and how stubborn it is
- Any working-time requirements on site
- The product the joint needs
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will send you a clear quote before any work starts.
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours for a few frames, or a day or more for a whole house, including the tidy-up. For a job in Deadwater, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- 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.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Tell us if parking is tricky
Getting a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or email us.
Related advice
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.