Buckinghamshire · England
Fern Window Mastic
Problem with your window and door frames in Fern? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
- A bead that does not match the frame
How we handle window mastic in Fern
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. Typical jobs include a bead that doesn’t match the frame and damp patches on the reveal after heavy rain, across patio & French doors, timber windows & doors and window sills.
In a village or hamlet like Fern, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Big or small, it’s backed by our one-year guarantee.
- Location
- Fern (SL7)
- Region
- Buckinghamshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around Fern
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. Historic houses like Cliveden (about 2.7 miles south-east) are a reminder that the area around Fern has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For an older house near a landmark such as Church of St John the Baptist, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For landlords with property near Bourne End station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Fern is about 2 miles north-east of Marlow, in Buckinghamshire. We carry out window mastic for homes and businesses in Fern and the surrounding area, as part of our work across Buckinghamshire. Fern is one of 263 towns and villages in Buckinghamshire we cover for window mastic. You can also see our page for Reading, about 14 miles away.
Work in SL7 is quoted and booked the same way as anywhere else. We also cover the places around Fern: Coldmoorholme (1 mile south-east), Little Marlow (1 mile south-west), Well End (1 mile south-east), Bourne End (1 mile south-east) and Flackwell Heath (1 mile north-east). Larger places within reach include High Wycombe (3 miles north), Chesham (10 miles north-east), Amersham (8 miles north-east), Beaconsfield (4 miles east), Chalfont St Peter (8 miles east) and Southcourt (15 miles north).
Near you in Fern
In Fern, that means homes and buildings near Bourne End Academy and The Black Lion pub and the streets around them. Fern’s nearest station is Bourne End station, roughly 1.1 miles south-east of the centre. A little further out are High Wycombe Castle (3.1 miles north) and Chiltern Sound Phonograph Museum (2.3 miles south-west). Not far away are Warren Nature Reserve.
Nearby places to Fern
Other services in Fern
Why act early in Fern
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Around Fern, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Why book with us
- Sanitary silicone with an anti-fungal additive in wet areas
- We leave the area clean and tidy
- Full insurance on every job
- Experience in homes, commercial sites and hotels
Read our cost guide or customer reviews.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Wipe condensation off the frames
- Keep timber frames painted
- Keep paint off silicone joints
- Walk round the house once a year and look at the joints
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
How it works
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work starts. The work generally takes a few hours for a handful of frames, longer for a whole house. For a village or hamlet like Fern, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
Ask for a quote
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.
Read more
Common problems we fix in Fern
A lot of older mastic was never designed to stay flexible. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
Keep an eye out for these signs:
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
- Gaps between the frame and the inside reveal
- Mastic that is falling out in pieces
Managing a site like Little Marlow CofE School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- Whether VAT is included
- How hidden problems are handled
Work for landlords, hotels and businesses
If you manage several properties in or around Fern, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
In hotels, rooms out of use cost money, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
Common questions in Fern
Can you do window mastic in Fern?
Yes, Fern is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Bourne End station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does it take to reseal the windows on a house?
Allow most of a day for a typical house, less for a few frames. Access and how stubborn the old mastic is affect the time most.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Can you seal the gap between the frame and the plaster indoors?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
What should I tell you?
Tell us what needs doing and where. If we need more, we’ll ask.
How we quote for window mastic
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- The product the joint needs
- How easy the joints are to reach
- Whether there’s mould to deal with
Combining jobs into one visit is usually more efficient than separate visits. You’ll get one clear quote for the whole job.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The rough size of the job
- If someone has resealed it before
- How we’d reach the joints
- Photos by email, if that is easy
For window mastic in Fern, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- A frame that has rotted at the joint
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Timber windows & doors
- Composite doors
- uPVC windows
- Window sills
- Patio & French doors
- Aluminium frames