Hampshire · England
Window Mastic in Pennington
Professional window mastic in and around Pennington, with every bit of old sealant taken out first and a 12-month guarantee.
- Old mastic that has gone black or come away
- Hard, cracked sealant around windows
- Gaps where the sill meets the wall
About our window mastic in Pennington
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on composite doors, timber windows & doors and window sills, and people most often call us about mastic that’s falling out in pieces and draughty joints inside around the window.
In smaller places like Pennington, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
There’s a 12-month guarantee on every job.
- Place
- Pennington (SO41)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Repaint timber before it’s bare
- Keep jet washers away from the mastic
- Do not use solvent cleaners on the joint
- Clear any debris from frame drain holes
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
How the job changes by surface
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We will point out any rot we find, as that is a job for a joiner.
What we’re called out for in Pennington
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, and it lets go sooner than it should.
It’s worth asking for a quote if you see:
- Hard, cracked sealant around windows
- Draughty joints inside around the window
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
Managing a site like Priestlands School? Then its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before you book
- Are they insured?
- What product goes in the joint
- What preparation is included
- What the quote includes, VAT included or not
What window mastic looks like in Pennington
Pennington 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. 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.
Homes close to Church of St Mark include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Lymington Town station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Pennington is about 1 mile south-west of Lymington, in Hampshire. From the centre of Pennington to the outskirts, we cover window mastic for every kind of property. 683 places in Hampshire are on our list. We also work in Southampton, about 14 miles from Pennington.
We cover every part of SO41 for window mastic. You’ll find streets such as Mead Road, Pound Road and Elm Avenue, all of which we cover. Neighbouring places we cover for window mastic include Lymington (1 mile north-east), Lower Pennington (1 mile south), Walhampton (1 mile north-east), Everton (1 mile west) and Lymore (2 miles south-west). Within a short drive, we also cover Totton (12 miles north), Hythe (10 miles north-east), New Milton (5 miles west), Ringwood (12 miles north-west), Locks Heath (15 miles north-east) and Warsash (14 miles north-east).
What’s near Pennington
We work in homes and buildings around Pennington Infant School and White Hart Inn, among other places. The nearest railway station is Lymington Town station, roughly 1.2 miles north-east of the centre. Well-known places in the area include St Barbe Museum and Art Gallery (0.9 miles north-east) and Yarmouth Castle (3.9 miles south-east). Green spaces nearby include Lymington and Keyhaven Marshes Nature Reserve.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes a few hours for a handful of frames, longer for a whole house. In a smaller place like Pennington, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Before we arrive
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
Honest limits
Before you book, it’s worth knowing the limits too:
- A door that needs adjusting, rehanging or new seals
- Condensation trapped between the panes
- A sash or casement that won’t close properly
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Where we work in Pennington
- uPVC windows
- Timber windows & doors
- Window sills
- Composite doors
- Patio & French doors
- Aluminium frames
Your questions about window mastic in Pennington
Is window mastic in a coastal place like Pennington any different?
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.
Can you help a landlord with a rental near Lymington Town station?
Yes. We work for landlords and letting agents as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Are you insured?
Yes. We are fully insured.
Do you seal inside as well as outside?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Do you have sealant for grey or black windows?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames usually suit brown.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
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, while a short indoor joint may be within reach.
Can I paint over the new sealant?
Silicone generally will not take paint. Let us know beforehand, and we will use a paintable product where it suits.
Nearby places to Pennington
More services for Pennington
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
How we quote for window mastic
The price is agreed before any work begins. It’s based on:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- When we can work, for business premises
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What we need to know
When you contact us, these details help:
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- Where the property is
- Any access issues, like height or stairs
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.