Hampshire · England

External & façade joints in Upham, Hampshire

External mastic across Upham and nearby, with every bit of old sealant taken out first and a 12-month guarantee.

Sealant pulling away from one side of the joint
Plants rooting in failed movement joints
Weathered mastic that no longer stretches

External mastic in Upham

External mastic in Upham: local notes

Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.

If you let a flat or house near Hedge End station, outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Upham Church of England Aided Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.

Upham is about 5 miles east of Eastleigh, in Hampshire. From the centre of Upham to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Upham is one of 683 towns and villages in Hampshire we cover. There’s also a page for Southampton, roughly 8 miles from Upham.

Every address in SO32 is covered for external mastic. That includes homes and businesses on Church Street, Shoe Lane and Widlers Lane and the roads around them. We also cover the places around Upham: Ashton (1 mile south-east), Lower Upham (1 mile south-west), Wintershill (2 miles south-west), Durley Street (2 miles south-west) and Bishop's Waltham (2 miles south-east). We also work in nearby towns such as Winchester (6 miles north-west), Gosport (13 miles south), Havant (14 miles south-east), Eastleigh (5 miles west), Fareham (9 miles south) and Horndean (11 miles south-east).

Around Upham

We work in homes and buildings around Brushmakers Arms. For rail, the closest station is Hedge End station, about 4.4 miles south-west. A little further out are Moorgreen Hospital (5.4 miles south-west) and Bishop's Waltham Museum (2.1 miles south). The countryside around Upham includes Bishops Waltham Branch LNR and Beacon Hill.

Map of Upham © OpenStreetMap contributors

External mastic in Upham

We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. If you have sealant pulling away from one side of the joint and damp patches traced to an open external joint, we can put it right, on concrete & block, render & cladding joints and brickwork movement joints alike.

Outside joints can only be sealed when they’re dry, so work in Upham is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.

We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.

The Mr Mastic team in navy uniforms in front of three Mr Mastic vans

Where: Upham (SO32)
Region: Hampshire
Cover: One year on every job
Quote: Quoted before any work starts
Call: 0345 464 0079
Page updated: 26 October 2026

For landlords and businesses

Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.

Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.

What we do, step by step

On the day, we start by going over the job with you. We protect the surfaces around the joints before we start. The work usually takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Upham needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.

We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
We cut out the failed sealant and rake out any dirt or growth.
We clean both faces of the joint and prime them where the product calls for it.
Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
A flexible exterior sealant is applied and tooled in a colour to suit the wall.

Preparing for the visit

Tell us about any previous sealing or DIY attempts
Mention any tricky access
Where the joints are inside, avoid wetting them before we arrive

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, and email pictures if that is easy.

Ask for a quote

Related advice

How to look after the new joints

So the new joints stay in good condition:

Keep soil, plants and ivy away from the joints
Check the sealant is paintable before painting near it
Never let anyone fill a movement joint with mortar
Act on the first splits you see

Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.

A joint that has stopped moving pushes the movement elsewhere, generally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.

Surface by surface

Joints between dissimilar materials

Different materials may need different primers. We prepare both faces so the sealant bonds properly.

Render joints

Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.

What sealant work can’t fix

We will always be straight with you, so here’s what sealant can’t fix:

Rising or penetrating damp from elsewhere in the wall
Cracking across the wall rather than at a joint
Movement that’s more than a sealant joint can take

If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.

Where we work in Upham

Joints between brick and frames
Brickwork movement joints
Copings & trims
Concrete & block
Façade panels
Render & cladding joints

Common questions in Upham

Can you help a landlord with a rental near Hedge End station?

Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.

Is Upham in your area for external mastic?

Yes. Our work covers London and the South East, and Upham is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.

Is there any odour?

Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.

Can you do several jobs on one visit?

Yes. Several rooms, windows or areas can go on one quote.

Do you take out the old sealant first?

Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.

What do you need from me for a quote?

Tell us what needs doing and where, with photos by email if possible. We will ask anything else we need to know.

How do I get a quote for external mastic in Upham?

Size, access and the old material all affect the cost. Call for a quick quote.

What sealant do you use?

Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.

Leave it or put it right?

It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together, and access only has to be arranged once. Where a wall is exposed, as many are in small places like Upham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.

Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.