Portsmouth · England
Baffins Window Mastic
Mastic around window and door frames, sills and patio doors in Baffins, with a 12-month guarantee on every job. Call for a quick quote.
- White mastic on grey or black frames
- Mastic that is falling out in pieces
- Draughts coming in around windows and doors
About our window mastic in Baffins
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 are often asked to deal with black, perished sealant on frames and gaps where the sill meets the wall, on patio & French doors, timber windows & doors and composite doors.
In smaller places like Baffins, 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 is covered by our 12-month guarantee, wherever you are in Portsmouth.
- Where
- Baffins (PO3, PO4, PO2)
- Wider area
- Portsmouth
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
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.
Patio & French doors
Heavy door frames can move more than windows. A flexible sealant copes with that.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not paint over the silicone
- Keep solvents and bleach off the sealant
- Look round the frames every year or so
- Make sure the drainage slots are not blocked
Silicone cannot normally be painted, so mention any painting plans before work begins. There are paintable sealants for joints that need it.
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.
Frames and glazing around Baffins
Baffins is within about 1 mile of 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Fratton station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For an older house near a landmark such as Church of St Cuthbert, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Baffins is about 1 mile east of Portsmouth, in Portsmouth. Our applicators cover window mastic for homes and businesses in Baffins and nearby, as part of our work across Portsmouth. Across Portsmouth, we cover 19 places, Baffins among them.
We work across the PO3, PO4 and PO2 postcode area for window mastic and the streets around it. Window mastic is available to properties on Byron Road, James Road and Dover Road. Baffins is on the A288, which makes it straightforward to reach with everything needed for window mastic. We also cover the places around Baffins: Copnor (1 mile north-west), Kingston (1 mile south-west), Fratton (1 mile south-west), Portsmouth (1 mile west) and North End (1 mile north-west). We also work in nearby towns such as Wymering (3 miles north), Paulsgrove (3 miles north-west), Drayton (3 miles north) and Farlington (3 miles north).
Near you in Baffins
Locally, jobs take us to homes and businesses close to The Baffins pub, St Edmund's Catholic School and Alexandra Park. Baffins’s nearest station is Fratton station, about 1 mile south-west. Well-known places in the area include The Bridge Shopping Centre (1.1 miles south-west) and Southsea Castle (2.4 miles south-west). Green spaces nearby include Portsdown Hill and Milton Locks.
Signs you need window mastic in Baffins
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
These are the problems we are asked about most:
- Gaps between the frame and the inside reveal
- Old mastic that has gone black or come away
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
For site and facilities teams at buildings such as Langstone Junior Academy, its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What preparation is included
- What guarantee comes with the work
- Are they insured?
- What happens if they find a problem under the old sealant
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Penetrating damp from a failed cavity tray or render
- A sash or casement that won’t close properly
- Draughts through the window seals rather than the frame
If in doubt, call 0345 464 0079 or send us an email and we will say what we think before booking.
Joints and surfaces we work on
- Patio & French doors
- Aluminium frames
- Composite doors
- Window sills
- uPVC windows
- Timber windows & doors
More services for Baffins
Your questions about window mastic in Baffins
Can you help a landlord with a rental near Fratton station?
Yes. We work for landlords and agents as well as homeowners. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Is Baffins within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
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. We’ll tell you how long your job needs when we quote.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Can new window sealant be painted?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you’re decorating and we will choose accordingly.
Can you reach windows above the ground floor?
Yes, in most cases. We plan safe access before the job, so mention the height and anything in the way.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
How it works
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes anything from an hour or two to a full day, depending on how many frames there are from start to finish. Parking around Baffins is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
- Tell us if parking is tricky
How to get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, ring 0345 464 0079 or email us.
Related advice
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.