Hampshire · England
Window Mastic in Thorns Beach
Window mastic across Thorns Beach and nearby, with old sealant always removed completely.
- Black, perished sealant on frames
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. In a small place like Thorns Beach, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Thorns Beach clients choose us
- More than 20 years in sealant work
- Tidy, careful work
- Any old sealant cut out fully, not covered over
- Quality sealants from Arbo and Everbuild
Take a look at our cost guide or what customers say.
About our window mastic in Thorns Beach
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 are dealing with white mastic on grey or black frames and cold air getting in at the frame edge, we can put it right.
Somewhere as small as Thorns Beach, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
You get a one-year guarantee, the same in Thorns Beach as everywhere else we work.
- Place
- Thorns Beach (SO42)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a morning for a couple of windows and a door for a typical job. For a village or hamlet like Thorns Beach, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand.
Read more
What affects the cost of window mastic
Jobs vary more than people expect. The main factors:
- The old material and how stubborn it is
- The type of sealant required
- Mould in or behind the old joints
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we’ll go through it with you.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- The type of property
- How we’d reach the joints
Want a quote for window mastic? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before we start.
Thorns Beach homes and the weather
Thorns Beach is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. With historic houses such as Beaulieu Palace House (about 3.8 miles north) nearby, there’s older building stock in the area around Thorns Beach as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Beaulieu Palace House, about 3.8 miles north, is one of the historic houses in the wider area around Thorns Beach. Letting a property close to Lymington Pier station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Thorns Beach is about 5 miles east of Lymington, in Hampshire. Homes, rented property, offices and hotels in Thorns Beach can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Our Hampshire coverage runs to 683 places, Thorns Beach among them. There’s also a page for Southampton, about 11 miles away.
Here we cover the SO42 postcode area for window mastic. We also cover East End (2 miles west), Norleywood (3 miles west), Hamstead (3 miles south), Cranmore (4 miles south) and Bouldnor (4 miles south). Larger places within reach include Gosport (13 miles east), Eastleigh (15 miles north), Fareham (12 miles north-east), Totton (11 miles north), Chandler's Ford (15 miles north) and Hedge End (12 miles north-east).
Around Thorns Beach
For rail, the closest station is Lymington Pier station, roughly 3.9 miles west. A little further out are Yarmouth Castle (4.8 miles south-west) and Beaulieu Abbey And Display Of Monastic Life (4 miles north). Green spaces nearby include Boldre Foreshore.
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
How to look after the new joints
To keep the joints looking good and working properly:
- Wipe condensation off the frames
- Repaint timber before it’s bare
- Keep jet washers away from the mastic
- Clean frames with a soft cloth and soapy water
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Questions from Thorns Beach
Does the coastal weather in Thorns Beach affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Thorns Beach?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is the work guaranteed?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear.
What sealant work cannot fix
Before booking, it’s worth knowing the limits:
- Draughts through the window seals rather than the frame
- Damp problems in the wall away from the window
- A sash or casement that won’t close properly
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Surfaces we seal
- Timber windows & doors
- Window sills
- Aluminium frames
- uPVC windows
- Composite doors
- Patio & French doors
Also in Thorns Beach
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.