Hampshire · England
Window & door mastic in Havant, Hampshire
Window mastic across Havant and nearby, with old sealant always removed completely and a one-year guarantee.
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
- Leaking joints at the ends of sills
How the visit works
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a morning for a couple of windows and a door. In Havant, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- 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.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- Tell us about any water getting in
- Mention any parking rules near the property
- Clear the area around the work
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Window mastic for homes and businesses in Havant
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on patio & French doors, composite doors and aluminium frames, and the jobs we see most are mastic that has split away from the wall and damp patches on the reveal after heavy rain.
Around Havant, many houses have gained conservatories, French doors or replacement windows over time. Each one adds more joints to look after, and those joints age at different rates. Leaks normally start at a sill, a frame head or a glazing joint.
Whatever the size of the job, you get the same 12-month guarantee in Havant and across Hampshire.
- Where
- Havant (PO9, PO11, PO7)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work cannot fix
We won’t take on work that will not last, so here’s what sealant cannot put right:
- Worn gaskets, brush seals or a door that has dropped
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
If in doubt, phone 0345 464 0079 or email us and we will say what we think before you book.
Surfaces we seal
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Window sills
- Patio & French doors
- Composite doors
Surface by surface
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
Composite doors
An exposed front door gets wind-driven rain. We pay most attention there.
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 be quoted together.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Walk round the house once a year and look at the joints
- Keep paint and stain on wooden frames in good order
- Avoid harsh chemicals near the mastic
- Make sure the drainage slots aren’t blocked
Check the drainage slots in the frames are not blocked, so water can run away instead of sitting against the joint.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Why it’s worth doing now in Havant
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we’ll say so. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Havant they spread with every shower and every downpour. Now is the easy time to put it right.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why Havant clients choose us
- White, clear, grey or another colour, product permitting
- We agree the colour with you first
- We leave the area clean and tidy
- Experience in homes, commercial sites and hotels
Common questions in Havant
I let a flat near Havant station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Is window mastic in a coastal place like Havant any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Is the new sealant paintable?
Not if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. If we need more, we’ll ask.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Are you insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
What else we do in Havant
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Frames and glazing around Havant
Havant is within about 2 miles of 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. Historic houses like Warblington Castle (about 1.5 miles south-east) are a reminder that the area around Havant has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Havant station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Schools such as Trosnant Infant School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as St Francis, the joint between an old wall and a newer frame is generally the first place rain gets in.
Havant is about 18 miles east of Southampton, in Hampshire. For window mastic in and around Havant, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Hampshire from our Crawley base. Across Hampshire, we cover 683 places, and Havant is one of them.
We work across the PO9, PO11 and PO7 postcode area for window mastic and the streets around it. Streets in the area include Colemore Square, Market Parade and Juniper Square, and we cover them all. You will find Havant on the A27 and A3(M), which makes it straightforward to reach with everything needed for window mastic. Close by, we work in Leigh Park (1 mile north), Denvilles (1 mile south-east), Durrants (2 miles north-east), Langstone (2 miles south) and Warblington (2 miles south-east). Further out, we also cover Gosport (8 miles south-west), Fareham (9 miles west), Horndean (3 miles north), Hedge End (14 miles west), Petersfield (10 miles north) and Locks Heath (12 miles west). As one of the bigger places in Hampshire, Havant has every kind of property, from flats to offices.
Landmarks near Havant
Around Havant, our work takes us to homes and buildings near The Perseverance pub, St Albans Church and Havant College, among other places. Havant’s nearest station is Havant station, about 0.6 miles south. Other landmarks nearby include Havant War Memorial Hospital (0.6 miles south) and Havant Museum (0.9 miles south-east). Not far away are Southmoor Nature Reserve.