Hampshire · England
Swanmore Window Mastic
Window mastic in Swanmore from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps between the frame and the inside reveal
- Leaking joints at the ends of sills
- Rushed sealant from a window installation
What the job involves on each surface
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that, where a rigid one would crack.
Window mastic in Swanmore, done properly
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re fully insured ARBOMaster approved applicators, and we give a one-year guarantee on the work. Common call-outs are for cracked sealant at the sill ends and whistling draughts around closed windows, across uPVC windows, composite doors and timber windows & doors.
In smaller places like Swanmore, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
All our work comes with our one-year guarantee, wherever you are in Hampshire.
- Location
- Swanmore (SO32)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Walk round the house once a year and look at the joints
- Keep solvents and bleach off the sealant
- Repaint timber before it’s bare
- Use gentle cleaners on frames and sealant
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
Do you need window mastic in Swanmore?
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. Backing rod sets the right depth.
People usually contact us when they notice something like this:
- Mastic that has split away from the wall
- Gaps where the sill meets the wall
- Cracked internal joints between frame and plaster
- Sealant in the wrong colour for the frame
If you look after a building such as Swanmore Church of England Aided Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- What preparation is included
- What guarantee comes with the work
- Whether the sealant suits the joint
- What insurance they hold
Windows and doors in Swanmore
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.
Letting a property close to Botley station? Then renewing tired window mastic between tenants heads off draught and damp complaints. If you live in an older home near Church of St Barnabas, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Swanmore is about 6 miles east of Hedge End, in Hampshire. Jobs in Swanmore get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 683 places across Hampshire, large and small. Southampton is on our list too, around 9 miles away.
Jobs for window mastic in SO32 works the same way as everywhere else we cover. Local streets include Church Road, Myers Close and Spring Vale. We also cover Hill Grove (1 mile east), Upper Swanmore (1 mile north-east), Mislingford (1 mile south-east), Shirrell Heath (1 mile south) and Kingsmead (2 miles south-east). Within a short drive, we also cover Winchester (10 miles north-west), Gosport (10 miles south), Havant (10 miles south-east), Eastleigh (7 miles west), Fareham (6 miles south) and Horndean (8 miles east).
Landmarks near Swanmore
Locally, jobs take us to homes and businesses close to Swanmore College of Technology. The nearest railway station is Botley station, about 3.7 miles south-west of the centre. A little further out are Bishop's Waltham Museum (1.7 miles north-west) and Knowle Hospital (4.3 miles south). Open spaces near Swanmore include Beacon Hill and Bishops Waltham Branch LNR.
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job usually takes a few hours for a handful of frames, longer for a whole house, and we tell you how long to leave it before we go. For a job in Swanmore, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Tell us if parking is tricky
- Clear items away from the joints we are working on
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
We do not publish a price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
Read more
What happens if it’s left?
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished. Homes in smaller places like Swanmore 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.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why Swanmore customers choose us
- Over 20 years’ experience
- Neat joints and a tidy finish
- Old sealant always removed completely
- We are fully insured
Read what affects the cost and customer reviews.
Towns and villages near Swanmore
More services for Swanmore
FAQs for Swanmore
Is Swanmore within the area you cover?
Yes. Swanmore is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Botley station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
How long should I leave it?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Can you reach windows above the ground floor?
Normally, yes. Access is planned before any work starts.
What affects the quote in Swanmore
There’s no set price list, because no two jobs are the same. The quote depends on:
- Which sealant suits the joint
- Whether there’s mould to deal with
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand.