Portslade construction mastic
Mastic packages for new-build and refurbishment projects in Portslade and across Brighton and Hove. CHAS accredited and fully insured, with a 12-month guarantee.
- Different trades sealing to different standards
- New external sealant already peeling away
- Mastic snags holding up handover
Construction mastic for businesses in Portslade
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 Portslade
Mastic is often where a new building first shows its quality to the client. A smeared bead round a window or a gap behind a worktop ends up on the snag list. Our aim is joints that pass at the first inspection. We work on brick and block movement joints, cladding and panel joints and sanitary and kitchen joints, and the failures we are asked to look at most are early adhesion failures on new external joints and old sealant on a refurbishment that needs stripping before new work. A single leaking joint is often how a building in Portslade first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Around places like Portslade, 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.
Work we carry out in Brighton and Hove comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or send photos by email and we will come back to it.
- Where
- Portslade (BN41, BN3, BN42)
- Wider area
- Brighton and Hove
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Signs you need construction mastic in Portslade
A new building moves while it dries and settles. Materials lose construction moisture and shrink and internal caulk in a moving joint is usually the first to crack. Choosing the right product for each joint reduces that.
Clients normally get in touch after noticing something like this:
- New external sealant already peeling away
- Sanitary sealant damaged by following trades
- Different trades sealing to different standards
- Caulk cracking where joints are moving more than expected
Older buildings in the area around Portslade, such as Portslade Manor, which lies south-west of Portslade, need care when sealed: the product has to suit soft or historic materials.
Comparing quotes
- What level of public liability insurance do they hold?
- Their approach to joint depth and backing
- The named product and why it was chosen
- The terms of the workmanship guarantee
Your questions answered
Is a smaller place like Portslade outside your area?
No. Small places get the same service as large ones. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.
Would you work within a site like Nevill Hospital?
Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
Does weather matter for sealant work?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.
Do your applicators hold CSCS cards?
Our applicators are CSCS-carded, and we hold CHAS accreditation and Constructionline membership. We confirm any paperwork you need with the quote.
Do you do fire-rated sealing on new builds?
It can be part of the package where specified. Record requirements are confirmed at quote stage.
Will you quote for a small job?
Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.
Places near Portslade
What else we do in Portslade
Honest limits
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Faulty frames rather than failed sealant
- Damage to finishes by other trades after we’ve sealed
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
If you’re not sure, just phone 01277 525 020 or email a schedule or drawings and we will give you a straight answer.
What we seal
- Brick and block movement joints
- Cladding and panel joints
- Window and door perimeters
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Floor and skirting junctions
Building owners, agents and FMs in Portslade
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Portslade can form part of a wider programme.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
What happens if it’s left?
Sealing over damaged or contaminated new joints might save a day, but it won’t last. Sealant can’t grip a contaminated or existing bead, and the defect comes back after handover. We cut out and redo the joint properly. A failed joint lets water into a building whatever its size. Catching it early means a reseal rather than repairs.
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
Why appoint us
- Constructionline member for supplier checks
- Workmanship guaranteed for 12 months
- CSCS-carded applicators
- Sealing commercial buildings since 2005
Read what affects the cost or our accreditations.
What the job involves on each surface
Window and door perimeters
Perimeter joints between frames and the structure are the weather line on any new building. We use the specified perimeter sealant, typically a low-modulus neutral-cure silicone, with backing rod in deeper gaps.
External facade and movement joints
Many facade substrates need a primer before sealing. Primer goes on where the sealant maker calls for it.
Construction mastic in Portslade: the local picture
With the shore within about 1 mile, Portslade counts as a coastal location. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, and the sealant, primer and backing need choosing with that in mind. Portslade lies roughly 46 miles out from central London. Towns within reach of London tend to keep building, from flats to offices and schools, which keeps mastic packages in demand.
School extensions, at buildings such as Peter Gladwin Primary School, usually run to the summer holidays, mastic included. On a healthcare site such as Nevill Hospital (1.1 miles east of Portslade), new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.
Portslade is about 1 mile west of Brighton and Hove, in Brighton and Hove. Businesses, contractors and managing agents in Portslade use us for work on mastic packages, as part of our coverage of Brighton and Hove. 29 places across Brighton and Hove fall within our area, Portslade among them.
Anyone looking for construction mastic in BN41, BN3 and BN42 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Mill Lane, Crown Road and Drove Road. Main routes into Portslade include the A293. Nearby places we also cover include Hangleton (1 mile north-east), Southwick (1 mile south-west), Kingston by Sea (1 mile west), Shoreham-by-Sea (2 miles west) and Old Shoreham (3 miles west). Nearby towns on our patch include Brighton (4 miles east), Carlton Hill (4 miles east), Hanover (4 miles east), West Hill (3 miles east), Brunswick (3 miles south-east) and Seven Dials (3 miles east).
Near you in Portslade
In Portslade, that means premises near The Mill House, King's School and Benfield Hill, among other places. Portslade’s nearest station is Fishersgate station, roughly 0.7 miles south. Other landmarks nearby include Churchill Square (3.4 miles south-east) and British Engineerium (1.8 miles east). The countryside around Portslade includes Thundersbarrow Hill and Shoreham Beach.
Our process
Site rules come first: signing in, inductions and any permit to work. Once we are cleared to begin, we take the joints in the sequence agreed with you. What matters most for a job in Portslade is a clear list of what needs doing, so send photos of each area. A fixed quote follows.
- We price from the drawings, specification and programme you send.
- You receive a fixed quote listing scope, products and phasing.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- Snags are cleared before handover and completed areas carry our 12-month guarantee.
Before we start on site
- For older buildings, check the asbestos register before work
- Point out any areas we must not close
- Confirm the product named in the specification
Quotes
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.