Hampshire · England
Locks Heath External Mastic
Problem with your movement joints in Locks Heath? We remove the old material, prepare the joints and seal them properly.
- Old sealant gone brittle and cracked
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
External mastic in Locks Heath
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. Common call-outs are for sealant pulling away from one side of the joint and movement joints filled with mortar instead of sealant, across concrete & block, copings & trims and render & cladding joints.
In and around Locks Heath, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
All our work is covered by our 12-month guarantee, wherever you are in Hampshire.
- Place
- Locks Heath (SO31, PO14, PO15)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
So the new joints stay in good condition:
- Don’t let climbing plants root in the sealant
- Fix overflowing gutters above sealed joints
- Wash walls gently around the sealant
- Look over the joints every year, ideally after winter
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Walls and rooflines in Locks Heath
Locks Heath 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 movement joints and outside wall joints, 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.
Homes close to St John include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Park Gate Primary School, larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near Swanwick station, outside joints that have cracked can let damp into a rental, so check them between lets.
Locks Heath is about 3 miles west of Fareham, in Hampshire. If you need external mastic in Locks Heath, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Hampshire from our Crawley base, Locks Heath included. Our area takes in 683 places across Hampshire, from the larger towns to small villages. You can also see our page for Southampton, about 7 miles away.
Jobs for external mastic in SO31, PO14 and PO15 is quoted and booked the same way as anywhere else. Local streets include Church Road, Lower Church Road and Laxton Close, and we cover them all. Other places close to Locks Heath include Titchfield Common (1 mile south-east), Park Gate (1 mile north), Warsash (1 mile south-west), Sarisbury (1 mile north-west) and Segensworth (1 mile north-east). Further out, we also cover Winchester (14 miles north), Gosport (6 miles south-east), Havant (12 miles east), Eastleigh (8 miles north-west), Fareham (3 miles east) and Horndean (12 miles east).
What’s near Locks Heath
Around Locks Heath, our work takes us to homes and buildings near Brookfield Community School and Language College and Jolly Farmer Public House. Locks Heath’s nearest station is Swanwick station, roughly 0.9 miles north of the centre. Nearby you will also find St Andrew's Castle (2.2 miles west) and Carron Row Farm Museum (1.6 miles east). The countryside around Locks Heath includes Holly Hill Woodland Park.
When it is not the sealant
We won’t take on work that will not last, so here’s what sealant can’t put right:
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
- Cracks in the bricks or render themselves, away from the joints
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Concrete & block
- Copings & trims
- Render & cladding joints
What affects the quote in Locks Heath
The price is agreed before any work begins. It’s based on:
- How many rooms, windows or areas are involved
- The product the joint needs
- Any mould that needs treating
- Access and height
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us.
Asking for a quote
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work and send you a clear quote.
Why it’s worth doing now in Locks Heath
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way. In an older home around Locks Heath, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Combining jobs into one visit generally makes better use of the time than several visits. We’ll give you a clear price for the lot.
Why Locks Heath customers choose us
- 12-month guarantee on every job
- Neat joints and a tidy finish
- Homes, businesses and hotels
- Arbo and Everbuild products
Read what affects the cost and customer reviews.
Questions from Locks Heath
Does living near the coast affect external mastic in Locks Heath?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can you help a landlord with a rental near Swanwick station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before any work starts, matched as closely as the range allows.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we are using and why.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
Nearby places to Locks Heath
Also in Locks Heath
How the visit works
At the end, we look at the finished work together. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. Parking around Locks Heath is generally 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.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Related advice
Landlords, agents and businesses in Locks Heath
For anyone letting property in or around Locks Heath, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.