Hampshire · England
Window & door mastic in Cove, Hampshire
Problem with your window and door frames in Cove? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- White mastic on grey or black frames
- Rushed sealant from a window installation
- Gaps between the frame and the inside reveal
What happens if it’s left?
The work is quick compared with the damage it prevents: it takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. Around Cove, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why book with us
- Colour agreed with you before we start
- Colour picked to suit the job
- ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
Take a look at our cost guide and what customers say.
Window mastic for homes and businesses in Cove
There are two joints on most windows. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. If you have cold air getting in at the frame edge and black, perished sealant on frames, we can help, whatever the surface.
Houses in smaller places like Cove can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
Your job is guaranteed for a year, as with all our work.
- Place
- Cove (GU14, GU17, GU51)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall and tooled smooth.
Towns and villages near Cove
Also in Cove
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How we quote for window mastic
We quote each job individually. These are the things that affect it:
- The old material and how stubborn it is
- Mould in or behind the old joints
- The number of rooms or windows
- The type of sealant required
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
What we need to know
To make quoting easier, let us know:
- Whether it has been sealed before
- The problem you’ve noticed
- If it’s domestic, commercial or a hotel
- Where the property is
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Window mastic in Cove: local notes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Parsonage Farm Nursery and Infant School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near St John the Baptist, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Cove is about 1 mile west of Farnborough, in Hampshire. Wherever you are in the GU14 postcode area, our applicators can take on window mastic. Our area takes in 683 places across Hampshire, large and small. You can also see our page for Reading, roughly 13 miles from Cove.
Every address in GU14, GU17 and GU51 is covered for window mastic. We cover properties on Fleet Road, Trunk Road and Limes Road. Neighbouring places we cover for window mastic include Southwood (1 mile south), Farnborough (1 mile east), North Camp (2 miles south-east), Mytchett (3 miles east) and Ash Vale (4 miles south-east). We also work in nearby towns such as Basingstoke (13 miles west), Alton (13 miles south-west), Yateley (3 miles north-west), Bordon (13 miles south), Hook (7 miles west) and Popley (13 miles west).
Around Cove
We work in homes and buildings around National Aerospace Library, Ancells Farm Park and Cove School. For rail, the closest station is Fleet station, roughly 1.7 miles west. Other landmarks nearby include Royal Army Dental Corps Historical Museum (2.7 miles south-east) and Fleet Community Hospital (2.4 miles west). Green spaces nearby include Aunt's Pool and Ball Hill.
Signs you need window mastic in Cove
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
Common reasons people contact us include:
- Old mastic that has gone black or come away
- Cracked or shrunken mastic around the frame
- Rain getting in at the frame or under the sill
- Cold air getting in at the frame edge
Rented homes near Fleet station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Questions to ask before you book
- Are they insured?
- Whether VAT is included
- When the joint can take water or movement
- How long the guarantee is
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Look round the frames every year or so
- Clean frames with a soft cloth and soapy water
- Clear any debris from frame drain holes
- Avoid harsh chemicals near the mastic
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What we do, step by step
Before we leave, we go over the finished joints with you. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on the size of the job. A visit to Cove is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- Mention any tricky access
- Let us know about parking restrictions
- Tell us about any water getting in
Getting a quote
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
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Questions from Cove
Do you work for landlords with property near Fleet station?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Cove?
Yes, Cove is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long will my window job take?
A few frames take a few hours. We confirm the timing with your quote.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Is the new sealant paintable?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before any work starts.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
How long should I leave it?
Different products cure at different speeds, so follow the cure time we give you.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.