Hampshire · England
Window Mastic in Bordon
Mastic around window and door frames, sills and patio doors for Bordon, backed by a one-year guarantee. Ask us for a quote.
- Draughts coming in around windows and doors
- Old mastic that has gone black or come away
- Hard, cracked sealant around windows
How we handle window mastic in Bordon
Over two decades of sealing frames has taught us which products suit which walls. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. Typical jobs include gaps between the frame and the inside reveal and old mastic that has gone black or come away, on patio & French doors, composite doors and window sills.
Houses in smaller places like Bordon can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Bordon (GU35)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- How easy the joints are to reach
- The number and length of the joints
- The old material and how stubborn it is
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- A few pictures by email, if you can
- How we’d reach the joints
- Whether it’s a home or a business
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Damp coming through the wall itself rather than the frame joint
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Bordon
- Timber windows & doors
- uPVC windows
- Composite doors
- Window sills
- Aluminium frames
- Patio & French doors
Questions from Bordon
Do you cover Bordon for window mastic?
Yes. Our work covers London and the South East, and Bordon is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Is Bordon within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for letting agents?
Yes. We work in homes, commercial premises and hotels.
Can you reach windows above the ground floor?
Yes, if safe access is possible. For high or awkward windows, we’ll tell you what access is needed.
Can you seal the gap between the frame and the plaster indoors?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
What does window mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Can you seal over the old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. 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 Bordon 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 confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.
Read more
Nearby places to Bordon
Also in Bordon
What happens if it’s left?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. Homes in smaller places like Bordon can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why us?
- An ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
- Full insurance on every job
Read what affects the cost or what customers say.
Bordon homes and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Bordon 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 Mark's Sacred Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Bordon is about 10 miles south-west of Aldershot, in Hampshire. We provide window mastic to homes and businesses in Bordon and the surrounding area, as part of our work across Hampshire. Bordon is one of 683 places in Hampshire where we work. You can also see our page for Portsmouth, about 23 miles away.
Here we cover the GU35 postcode area for window mastic. We cover properties on High Street, Station Road and Cobbett Square. Main roads around Bordon include the A325 and B3002. We also cover Pinewood Village (1 mile north), Deadwater (1 mile east), Whitehill (1 mile south), Lindford (1 mile north-east) and Hollywater (1 mile south-east). Further out, we also cover Basingstoke (15 miles north-west), Farnborough (13 miles north), Fleet (11 miles north), Aldershot (10 miles north-east), Alton (5 miles north-west) and Petersfield (8 miles south-west).
Near you in Bordon
In Bordon, that means homes and buildings near Mill Chase Academy. For rail, the closest station is Liphook station, about 4.1 miles south-east. A little further out are The Romany Museum (3.6 miles west) and Chase Community Hospital (0.6 miles south). Open spaces near Bordon include Selborne Hill and Deadwater Valley.
Looking after it afterwards
After the cure time, these simple habits help:
- Look round the frames every year or so
- Ventilate rooms so frames don’t stay wet inside
- Keep paint off silicone joints
- Avoid blasting the frames with a pressure washer
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Signs you need window mastic in Bordon
Sun, frost and rain wear sealant out. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Any of these means the joints need attention:
- Mastic that’s falling out in pieces
- Water coming in at the bottom corners of a door
- A bead that does not match the frame
- Mastic that has split away from the wall
Letting a property close to Liphook station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What to look for in a quote
- What insurance they hold
- Who turns up on the day
- Whether VAT is included
- What preparation is included