Hampshire · England
Frostlane Window Mastic
Mastic around window and door frames, sills and patio doors for Frostlane, backed by a 12-month guarantee. Ask us for a quote.
- White mastic on grey or black frames
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
How we handle window mastic in Frostlane
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that can’t move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. Common call-outs are for hard, cracked sealant around windows and gaps left after new windows were fitted, across uPVC windows, patio & French doors and timber windows & doors.
Somewhere as small as Frostlane, 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.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Frostlane (SO45)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Frostlane
Does living near the coast affect window mastic in Frostlane?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is Frostlane within the area you cover?
Yes. Frostlane is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can tenants book the work?
Of course. Check with your landlord; we can send the quote to them too.
Are you insured?
Yes. We’re fully insured for domestic and commercial work.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can resealing stop a draught around my window?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
The process
At the end, we look at the finished work together and tell you how long to leave it. The visit itself generally takes most of a day for a typical house, less for a few frames, depending on how much there is to do. For a village or hamlet like Frostlane, 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.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Tell us about any previous sealing or DIY attempts
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
Ask for a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Related advice
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Aftercare tips
So the new joints stay in good condition:
- Ventilate rooms so frames don’t stay wet inside
- Avoid blasting the frames with a pressure washer
- Keep paint off silicone joints
- Clear any debris from frame drain holes
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Why it’s worth doing now in Frostlane
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Around Frostlane, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint usually makes the job bigger, not smaller. If you are unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- 12-month guarantee on every job
- Over 20 years’ experience
- 180+ five-star Google reviews
- We never seal over old sealant
Read what affects the cost and our reviews.
When something else is needed
We won’t take on work that won’t last, so here’s what sealant cannot put right:
- A failed sealed unit that has misted up
- Draughts through the window seals rather than the frame
- Damp coming through the wall itself rather than the frame joint
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Patio & French doors
- Composite doors
- uPVC windows
- Timber windows & doors
- Window sills
- Aluminium frames
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What else we do in Frostlane
Frostlane homes and the weather
Frostlane is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. 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 Medieval Merchant's House (about 3.1 miles north) nearby, there’s older building stock in the area around Frostlane as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Waterside Primary School, its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Netley station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Frostlane is about 1 mile south-east of Hythe, in Hampshire. From the centre of Frostlane to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 683 places in Hampshire are on our list, from the larger towns to small villages.
We cover every part of SO45 for window mastic and the streets around it. We also cover the places around Frostlane: Hardley (1 mile south), Little Holbury (2 miles south), Holbury (2 miles south), Weston (2 miles north) and Roughdown (2 miles south). Within a short drive, we also cover Winchester (14 miles north), Gosport (11 miles east), Eastleigh (8 miles north), Fareham (8 miles east), Totton (7 miles north-west) and Chandler's Ford (9 miles north).
Landmarks near Frostlane
In Frostlane, that means homes and buildings near Noadswood School. The nearest railway station is Netley station, roughly 2.5 miles north-east of the centre. A little further out are Royal South Hants Hospital (4 miles north) and Netley Castle (2 miles north-east). Green spaces nearby include Mercury Marshes.
Common problems we fix in Frostlane
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. That’s what backing rod is for.
Signs it’s time to call us include:
- Draughts coming in around windows and doors
- Rushed sealant from a window installation
- Gaps where the sill meets the wall
- Water coming in at the bottom corners of a door
For an older house near a landmark such as St Anne, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- How much experience the applicator has
- Are they insured?
- What happens if they find a problem under the old sealant
- How the surfaces are prepared before sealing