Portsmouth · England
External Mastic in Baffins
External mastic in Baffins from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Joints pointed up with cement by mistake
About our external mastic in Baffins
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. We work on façade panels, copings & trims and brickwork movement joints, and the jobs we see most are plants rooting in failed movement joints and joints where the bead has come unstuck.
Homes around Baffins range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Baffins (PO3, PO4, PO2)
- Region
- Portsmouth
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
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.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What we are called out for in Baffins
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Common reasons people contact us include:
- Cracked joints where brick meets render or frames
- Panel joints letting water in
- Damp patches traced to an open external joint
- Weeds or debris growing in open joints
Rented homes near Fratton station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- What the cure time is
- Which colour the sealant will be
- How long the guarantee is
- How much experience the applicator has
Baffins buildings and the weather
Baffins is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Langstone Junior Academy, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Cuthbert, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Baffins is about 1 mile east of Portsmouth, in Portsmouth. Baffins gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Portsmouth coverage runs to 19 places, and Baffins is one of them.
Postcode districts we cover here for external mastic: PO3, PO4 and PO2. You’ll find streets such as Byron Road, James Road and Dover Road, and we cover them all. Baffins is on the A288, which makes it straightforward to reach with everything needed for external mastic. Nearby, we also carry out external mastic in 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). Within a short drive, we also cover Wymering (3 miles north), Paulsgrove (3 miles north-west), Drayton (3 miles north) and Farlington (3 miles north).
Near you in Baffins
Around Baffins, our work takes us to homes and buildings near The Baffins pub, St Edmund's Catholic School and Alexandra Park and the streets around them. The nearest railway station is Fratton station, roughly 1 mile south-west of the centre. A little further out are The Bridge Shopping Centre (1.1 miles south-west) and Southsea Castle (2.4 miles south-west). For a walk, there’s Portsdown Hill and Milton Locks.
FAQs for Baffins
Does living near the coast affect external mastic in Baffins?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Do you work for landlords with property near Fratton station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
What is backing rod for?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
What the job involves on each surface
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two.
Quotes for external mastic in Baffins
There’s no set price list, because jobs vary so much. What we look at:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- The type of sealant required
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
What to tell us for a quote
To make quoting easier, please include:
- A few photos by email, if you can
- The problem you’ve noticed
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Hotels need rooms back in use, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
More services for Baffins
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. In a smaller place like Baffins, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why book with us
- You choose the colour before work begins
- Approved under the ARBOMaster scheme
- Tidy, careful work
- Rated 4.9 stars on Google
Take a look at what affects the cost and what customers say.
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours to a few days, depending on the length of joint and the access. 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.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.