Sway construction mastic
Mastic packages for new-build and refurbishment projects in Sway and across Hampshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Existing joints on a refurb that need cutting out and resealing
- A long mastic snag list close to completion
- Different trades sealing to different standards
Construction mastic in Sway
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our construction mastic in Sway
On refurbishments, the mastic package usually includes cutting out old sealant as well as sealing new work. Old beads come out completely, as fresh silicone can’t grip old. New and existing joints then get the same preparation. If you have window and door perimeters that won’t pass inspection and inconsistent sealant finishes from plot to plot, we can put it right. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Sway is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.
Around places like Sway, a lot of construction is the conversion of older buildings, which leaves joints between old walls and new frames that need a sealant able to take the movement, in a colour the planners or architect are happy with.
Every job is signed off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Where
- Sway (SO41)
- Wider area
- Hampshire
- Cover
- 12 months on every job
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Questions we are asked in Sway
Is Sway off your patch?
Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Good photographs up front let us bring everything on the first visit.
Do you take on work at healthcare sites like Lymington New Forest Hospital?
Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Do you work to architects’ specifications?
Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it, flagging anything that needs clarifying.
What joints do you seal on a new build?
External perimeters and movement joints, internal caulking where specified, sanitary and kitchen joints, plus snagging.
Can you work plot by plot or floor by floor?
We work to your programme. Share the release dates and we’ll match our work to them so sealing follows the trades.
Can you seal external joints in wet or cold weather?
External sealant needs a dry joint and a temperature within the product’s range. Damp, frost or condensation on frames can stop work, so internal areas are often done on those days.
Other services in Sway
What the job involves on each surface
Fire-rated sealant where specified
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested detail. The design and sign-off of fire stopping sit with the designer, principal designer or fire engineer; we work to the specification and the manufacturer’s installation guidance.
Internal decorators’ caulk
Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s for gaps that stay still and get painted, and we use a flexible sealant where there’s movement.
Construction mastic in Sway: the local picture
Several hotels sit less than 2 miles from Sway. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. The South East is one of the drier parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so we time external mastic for dry faces and agree it with the site team.
Hotels like Forest Heath Hotel, under half a mile south of Sway, rarely close for long, so refurbishment mastic is phased floor by floor. When a school such as St Luke's Church of England Primary School is extended or refurbished, the mastic package is often squeezed into the holidays.
Sway is about 3 miles north-west of Lymington, in Hampshire. Commercial clients in Sway use us for work on mastic packages. 723 places across Hampshire fall within our area, including Sway. There’s a separate page for Southampton, about 13 miles away.
If you need construction mastic in SO41, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. For a building on Station Road, Anderwood Drive and Cruse Close or nearby, we can quote for mastic packages. We also cover Mead End (1 mile west), Tiptoe (1 mile south-west), Hordle (2 miles south), Ashley (2 miles south-west) and Bashley (2 miles west) for mastic packages. Bigger towns within reach include 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).
Around Sway
Around Sway, our work takes us to commercial buildings near Forest Heath Hotel. There’s a railway station in Sway itself: Sway station. A little further out are Lymington New Forest Hospital (2.9 miles south-east) and Sammy Miller Motorcycle Museum (3.3 miles south-west). For a walk, there’s Milford on Sea LNR.
Looking after the joints
To get the most from the new sealant:
- Note which sealant went where at handover
- Don’t force external sealing on a damp or frosty day
- Ask installers to correct oversized gaps first
- Ask cleaners to use soft cloths around fresh sealant
The package carries our 12-month guarantee for workmanship. The guarantee covers how we sealed, not later damage by other trades, so protecting sealed areas matters.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Sealant stretched over an oversized gap won’t last, so the installer needs to correct it first. We raise them during our first walk of the area.
Common problems we fix in Sway
On construction sites, joints normally fail early because of when they were sealed, not what was used. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage.
If one of these sounds familiar, it’s time for a closer look:
- Missed perimeter joints on a new elevation
- Failed sealant in an existing building being refurbished
- Perimeter gaps outside the sealant’s range
- A mastic package split between trades with no clear owner
On a healthcare site such as Lymington New Forest Hospital, 2.9 miles to the south-east of Sway, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Comparing quotes
- Proof of insurance
- Will CSCS-carded applicators be on site?
- The named product and why it was chosen
- Do they follow the manufacturer’s priming guidance?
From enquiry to sign-off
A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. The work itself typically takes a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes, and our waste is bagged and taken away as we go. For a site in Sway, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Joints are prepared, backed and sealed to the specification.
- After snagging, the work is handed over under our 12-month guarantee.
Before we start on site
- Send your site hours and access windows
- Let us know about inductions and permits
- Point out parking and an unloading spot
Quotes
For a fixed quote, call 01277 525 020 or email the details over, telling us the site location and the nature of the job. Our quote form is another easy route.
Advice
Building owners, agents and FMs in Sway
We work for building owners and managing agents on sealant work across single buildings or whole portfolios. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Sites in Sway can sit alongside others in a wider programme across Hampshire.
Honest limits
Not every problem is a sealant problem, and we’d rather tell you before you spend money. It won’t fix:
- Rework caused by others damaging completed areas
- Frames fitted out of tolerance
- Specifying the product where the designer hasn’t
Not sure which it is? You can give us a call on 01277 525 020 or use the quote form and we will tell you honestly.
Where we work in Sway
- Floor and skirting junctions
- Sanitary and kitchen joints
- Internal decorators’ caulk
- Brick and block movement joints
- Window and door perimeters
- Cladding and panel joints