East Sussex · England
Window & door mastic in Penhurst, East Sussex
Specialist window mastic for Penhurst: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Gaps left after new windows were fitted
- Cold air getting in at the frame edge
- Sealant in the wrong colour for the frame
Penhurst questions
Do you work for landlords with property near Battle station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Will you come out to Penhurst?
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.
Will new mastic stop draughts?
Often, yes. The gap between frame and wall is a common source of draughts, and sealing the inside and outside joints closes that path.
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 do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or send us an email.
Do you guarantee window mastic?
Yes, with our 12-month guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Where is Mr Mastic based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Window mastic for homes and businesses in Penhurst
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. If you have old mastic that has gone black or come away and mastic that has split away from the wall, we can help.
Homes in small places like Penhurst often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
All our work comes with our 12-month guarantee, wherever you are in East Sussex.
- Place
- Penhurst (TN33)
- Region
- East Sussex
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Penhurst
What else we do in Penhurst
When to call us in Penhurst
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. That is what backing rod is for.
Look out for any of the following:
- Sealant in the wrong colour for the frame
- Water coming in at the bottom corners of a door
- Rushed sealant from a window installation
- Leaking joints at the ends of sills
Homes close to The Parish Church of St Michael include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- Who does the work, and how experienced they are
- Is the old sealant removed completely?
- What insurance they hold
- How long to leave it before use
How it works
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere as small as Penhurst, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Getting a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Advice
Frames and glazing around Penhurst
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 Bateman's (about 4.7 miles north) nearby, there’s older building stock in the area around Penhurst as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Battle station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Penhurst is about 6 miles north-west of Bexhill-on-Sea, in East Sussex. Our applicators cover window mastic for homeowners, landlords and businesses in Penhurst and the surrounding area, as part of our work across East Sussex. We cover 289 towns and villages across East Sussex, large and small. We also work in Brighton, about 24 miles from Penhurst.
Work in TN33 is quoted and booked the same way as anywhere else. If you are just outside Penhurst, we cover Steven's Crouch (2 miles south-east), Netherfield (2 miles north-east), Twelve Oaks (2 miles north), Hollingrove (3 miles north) and Brightling (3 miles north). Larger places within reach include Eastbourne (11 miles south-west), Hastings (8 miles south-east), Bexhill-on-Sea (6 miles south-east), Hailsham (8 miles south-west), Crowborough (14 miles north-west) and St Leonards (8 miles south-east).
Landmarks near Penhurst
Typical jobs here are in homes near Ashburnham Park. For rail, the closest station is Battle station, about 3.8 miles east of the centre. Nearby you will also find Battle Museum of Local History (3.2 miles east) and Bexhill Hospital (5.8 miles south-east). Not far away are Senlac Hill.
What affects the cost of window mastic
There’s no set price list, because no two jobs are the same. What we look at:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- Whether there’s mould to deal with
- The type of sealant required
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- The address or postcode of the job
- Roughly how big the job is
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Surface by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour suits the frame.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Penhurst
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
Aftercare tips
After the cure time, these simple habits help:
- Don’t paint over the silicone
- Clear any debris from frame drain holes
- Keep timber frames painted
- Check the mastic once a year
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just call 0345 464 0079 or email us.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.