Hampshire · England
External Mastic in Sway
Professional external mastic in and around Sway, with old sealant always removed completely and a 12-month guarantee.
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
- Movement joints with cracked, split or missing sealant
Landlord and commercial work in Sway
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Housing providers, facilities teams and property managers book us too in Sway and across Hampshire. Several sites can go on one quote.
About our external mastic in Sway
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. Typical jobs include weathered mastic that no longer stretches and joints with sealant missing in places, on façade panels, concrete & block and joints between brick and frames.
Around Sway, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks generally start at a gutter end, a garage door frame or where an extension meets the house.
All of our work is guaranteed for twelve months.
- Where
- Sway (SO41)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Other services in Sway
Quotes for external mastic in Sway
The quote reflects the job in front of us. We look at:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- Access and height
- Whether old sealant or filler has to be cut out
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What we need to know
Photos help, but a description is a good start. Please mention:
- If it’s domestic, commercial or a hotel
- Where the property is
- What’s wrong with the joints now
- Roughly how big the job is
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
Looking after it afterwards
Aftercare is simple:
- Check the sealant is paintable before painting near it
- Tell anyone working on the walls about the movement joints
- Deal with leaking gutters that soak the joints below
- Keep high-pressure jets off the joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Different surfaces, different methods
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. A visit to Sway is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Mention any tricky access
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
When something else is needed
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Adding movement joints to masonry that has none
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
Outside joints around Sway
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around St Luke's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. Managing a site like St Luke's Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near Sway station, outside joints that have cracked can let damp into a rental, so check them between lets.
Sway is about 3 miles north-west of Lymington, in Hampshire. Sway gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Sway is one of 683 towns and villages in Hampshire we cover for external mastic. Southampton is on our list too, about 13 miles from Sway.
Every address in SO41 is within our area for external mastic, from the main roads to the quietest streets. You’ll find streets such as Station Road, Anderwood Drive and Cruse Close. Other places close to Sway include Mead End (1 mile west), Tiptoe (1 mile south-west), Hordle (2 miles south), Ashley (2 miles south-west) and Bashley (2 miles west). We also work in nearby towns such as Totton (10 miles north-east), Lymington (3 miles south-east), Romsey (15 miles north), Hythe (10 miles north-east), New Milton (3 miles south-west) and Ringwood (9 miles north-west).
Local landmarks in Sway
Locally, jobs take us to homes and businesses close to Forest Heath Hotel and the streets around them. There’s a railway station in Sway itself: Sway station. Other landmarks nearby include Lymington New Forest Hospital (2.9 miles south-east) and Sammy Miller Motorcycle Museum (3.3 miles south-west). Not far away are Milford on Sea LNR.
Questions from Sway
Can you help a landlord with a rental near Sway station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover smaller places like Sway?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Should I point up the gap in my brickwork?
No, not if it’s a movement joint. Pointing it stops it working. A flexible sealant is the right fill.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.