The Mastic Doctor team standing beside their branded vans outside an office building
Brighton and Hove · England

Facade and window perimeter sealing in Portslade, Brighton and Hove

Facade sealing in Portslade, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Old perimeter mastic that has dried out
  • Discoloured or dirty facade joints
  • Failed sealant on precast panel joints
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Facade sealing across Portslade

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

How we handle facade sealing in Portslade

Every facade quote starts with how the joints will be reached. Tell us about access: whether scaffold is already up, what the client is arranging, and any restrictions on the site, and we will fit the work around it. If you are dealing with new sealant peeling off old mastic and hard, chalky sealant that no longer flexes, we can put it right, on coping and flashing joints, cladding panel joints and stone and brick facade joints alike. Searching for sealant specialists in Portslade? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.

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, phone 01277 525 020 or email the details over and we’ll come back to it.

Location
Portslade (BN41, BN3, BN42)
Region
Brighton and Hove
Guarantee
12 months on every job
Quote
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

When to bring in a specialist

Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

From enquiry to sign-off

Occupied buildings need a little choreography. The work area is signed and kept contained, keep walkways clear and work section by section so the rest of the building stays in use. If neighbouring businesses or buildings around Portslade need work too, visits can be combined. Tell us your site hours and we will plan around them.

  1. We look at the joints, the drawings and the access before pricing.
  2. The old bead is cut away completely, not overlaid.
  3. Joint faces are cleaned to firm, sound material, with primer where the sealant maker specifies it.
  4. Backing rod, or bond-breaker tape in shallow joints, limits the depth.
  5. A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Getting the site ready

  • Send asbestos survey details if the building is pre-2000
  • Move anything stored against the joints
  • Let us know about inductions and permits

Request a quote

To get a fixed quote, call the office on 01277 525 020 or use the quote form with the site address and an outline of the work. Our quote form is another easy route.

Get a price

Related advice

Your questions answered

Can work at a site such as University of Brighton Moulesecoomb Campus fit around teaching?

Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Is a hospital such as Nevill Hospital somewhere you can work?

Yes, hospitals are one of the sectors we cover. We follow the site’s permits, sign-in and infection-control procedures in every area.

Are you fully insured?

Yes. Our insurance certificate can be sent alongside the quote.

Do you take on small jobs?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

Do you work in Portslade?

Yes. We take on work across Portslade.

Are you CHAS accredited and on Constructionline?

Yes. We’re CHAS accredited, we’re a Constructionline member and we use CSCS-carded applicators.

What type of sealant goes on window perimeters?

Most facade and window perimeter joints take a low-modulus neutral-cure silicone. Some joints call for hybrid, PU or polysulphide instead, depending on the substrate and the specification.

Why it’s worth doing now in Portslade

Resealing a few window perimeters is a small job; repairing water-damaged interiors and fixings is not. Leaks travel along the structure. Small buildings around Portslade suffer from failed joints as much as large ones. 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 clients in Portslade choose us

  • A Constructionline member, so easy to vet
  • Fixed quotes based on photographs, drawings or a visit
  • Old sealant cut out, never sealed over
  • Work carried out by CSCS-carded applicators

Read our cost guide and our accreditations and insurance.

For managing agents and facilities managers

CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. We’re fully insured, and our insurance certificate can go with the quote.

Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

How the quote is worked out

To price the job, we consider:

  • The product specified
  • The site’s rules and procedures
  • Removal of failed or old sealant
  • Working within restricted access windows

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.

Details that help us quote

Good information means a firmer quote. When you get in touch, include:

  • The postcode of the building
  • What the building is and how it’s used
  • Any dates the work must fit around
  • Access details, including height

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call the office on 01277 525 020 or send photos by email.

Mastic packages on Portslade sites

Portslade is within about 1 mile of the coast. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Portslade is in the South East, one of the UK’s drier regions. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, which is why external dates are agreed with the site manager.

With historic properties like Portslade Manor (to the south-west of Portslade) in the area, refurbishment work often meets old masonry that needs compatible sealants. When units on a site such as Victoria Road Trading Estate, 0.6 miles south-east of Portslade, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. School extensions, at buildings such as Peter Gladwin Primary School, normally run to the summer holidays, mastic included.

Portslade is about 1 mile west of Brighton and Hove, in Brighton and Hove. Looking for facade sealing in Portslade? We can help. Portslade is one of 29 places in Brighton and Hove on our list for facade joints.

We take on facade joints across the BN41, BN3 and BN42 postcode area, whatever the building. Among the streets we cover are 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) for facade joints. Further afield, our area takes in 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).

Around Portslade

Recent enquiries here include premises near The Mill House, King's School and Benfield Hill. The closest station to Portslade is Fishersgate station, about 0.7 miles south of the centre. A little further out are Churchill Square (3.4 miles south-east) and British Engineerium (1.8 miles east). For a walk, there’s Thundersbarrow Hill and Shoreham Beach.

Map of Portslade © OpenStreetMap contributors

Looking after the joints

After handover, these steps help:

  • Note when each elevation was last resealed
  • Check that rainwater leaves the facade the way it was designed to
  • Combine resealing with other works that need access
  • Insist on a full cut-out when joints are renewed

Include facade joints in your planned maintenance inspections. Watch for splits, gaps at the edges, hardening and discolouration; note where they appear.

Deal with sections that fail early as soon as they show. A few metres resealed promptly can stop water damage spreading.

Accreditations

Trusted. Accredited. Insured.