Portsmouth · England
Window & door mastic in North End, Portsmouth
Specialist window mastic for North End: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Gaps between the frame and the inside reveal
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
Questions from North End
I let a flat near Hilsea station. Can you help?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Will you come out to North End?
Yes. North End is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you.
How many windows can you do in a day?
The work takes most of a day for a typical house, less for a few frames. Access and how stubborn the old mastic is affect the time most.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months.
About our window mastic in North End
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, phone 0345 464 0079 or drop us an email with the number of frames and any access details for window mastic in North End. We work on composite doors, aluminium frames and timber windows & doors, and people most often call us about damp patches on the reveal after heavy rain and mastic that’s falling out in pieces.
Around North End, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
Your job is guaranteed for a year, as with all our work.
- Location
- North End (PO2, PO1)
- Wider area
- Portsmouth
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Around North End, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why us?
- Experience in homes, commercial sites and hotels
- We’re fully insured
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
What affects the cost of window mastic
The quote reflects the job in front of us. We look at:
- The old material and how stubborn it is
- Any working-time requirements on site
- Mould in or behind the old joints
- The type of sealant required
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Whether it’s a home or a business
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
Want a quote for window mastic? Please call 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before any work starts.
Looking after it afterwards
Looking after new joints is easy:
- Avoid blasting the frames with a pressure washer
- Keep paint and stain on wooden frames in good order
- Clear any debris from frame drain holes
- Walk round the house once a year and look at the joints
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take most of a day for a typical house, less for a few frames. Parking around North End is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
- Tell us about any water getting in
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Related advice
Surface by surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour suits the frame.
Composite doors
Front doors take the weather head on. Those corners get the most care.
What window mastic looks like in North End
North End is within about 1 mile 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Hilsea station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Corpus Christi Catholic Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as St. Mark’s, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
North End is about 1 mile north of Portsmouth, in Portsmouth. From the centre of North End to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our Portsmouth coverage runs to 19 places, North End among them.
Every address in PO2 and PO1 is within our area for window mastic. Window mastic is available to properties on Knox Road, Croft Road and Kirby Road. With the A2047 close by, North End is simple for us to get to for window mastic. Close by, we work in Rudmore (1 mile south-west), Tipner (1 mile west), Portsmouth (1 mile south), Copnor (1 mile south-east) and Hilsea (1 mile north-east).
Around North End
Around North End, our work takes us to homes and buildings near Mayfield School, Alexandra Park and St Edmund's Catholic School and the streets around them. North End’s nearest station is Hilsea station, about 1.2 miles north-east of the centre. Other landmarks nearby include Charles Dickens Birthplace Museum (0.8 miles south-west) and Portchester Castle (2.1 miles north-west). Green spaces nearby include Portsdown Hill and Milton Locks.
For landlords and businesses
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
What else we do in North End
Honest limits
To be straight with you, some problems need a different trade:
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
- A failed sealed unit that has misted up
If you’re not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Where we work in North End
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
- uPVC windows
- Aluminium frames