The Mastic Doctor team standing beside their branded vans outside an office building
West Sussex · England

Facade and window perimeter sealing in River, West Sussex

Facade joint and window perimeter sealing on commercial buildings across River, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Failed seals around shopfront and entrance frames
  • Facade joints cracked through the middle
  • Draughts around frames and panels
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
£5m public liability

Facade sealing across River

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

Facade sealing in River, done properly

We are often asked to look at water coming in around frames. Failed perimeter sealant is a frequent cause. If the evidence points away from the sealant, we say so before quoting. We work on stone and brick facade joints, shopfront frames and cladding panel joints, and the usual reasons a site gets in touch are gaps between rainscreen or cladding panels and new sealant peeling off old mastic. For commercial sealant work in River, you deal with one contact from quote to sign-off, whether it’s one building or several.

Construction in and around smaller places such as River is often barn conversions, small groups of houses or extensions to halls and schools. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.

Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
River (GU28)
Wider area
West Sussex
Guarantee
12 months on our workmanship
Price
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026

How a job runs

Tell us your site hours and access windows and we will plan around them. While we’re working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. For a building around River, tell us how to find it and who will meet us. Send that with the details and we’ll confirm the plan with the quote.

  1. Access, site rules and timing are settled with the client up front.
  2. Weather and temperature are checked against the product’s limits.
  3. We remove the old bead and check the edges are sound.
  4. Faces are cleaned, primed where needed and backed.
  5. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

Getting the site ready

  • Confirm the product named in the specification
  • Flag any permit to work we will need
  • Agree which areas must stay open

Ask for a quote

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Ask for a quote

Advice

What we’re called out for in River

When the sealant tears down its centre, it has normally been asked to move more than it can. The joint may be too narrow, the bead too thin or the sealant the wrong movement class.

Any of the following is a good reason to get the joints checked over:

  • Previous reseals run over old sealant
  • Cladding panel joints that have opened up
  • Weathered joints at frame-to-structure perimeters
  • Facade joints cracked through the middle

For contractors refurbishing units at places like Hampers Common Industrial Estate, 2.4 miles to the east of River, the mastic covers cladding panels, roller-door and window perimeters.

What to look for in a quote

  • Their plan for phasing and protecting the area
  • Their public liability cover
  • The terms of the workmanship guarantee
  • The named product and why it was chosen

Questions to ask before you appoint anyone

How the job changes by surface

Precast concrete panels

Joints between precast panels carry real movement. A sealant of the right movement class goes in over backing rod, primed where the maker specifies.

Cladding panel joints

Panel joints on cladding and rainscreen systems take movement every day. The sealant has to match the movement and the panel finish, as the specification sets out.

Quoting for work in River

Each job is priced on its own details. The things that drive the figure:

  • The total length or number of joints
  • The size and state of each joint
  • Specialist products, such as fire-rated or hygienic sealants
  • Any access equipment needed

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 you’ll have a fixed figure to work with.

Before you send an enquiry

It doesn’t need to be a full survey. These details are enough to start:

  • The type of building and who uses it
  • Rough lengths or quantities, or drawings if you have them
  • Your programme or deadline
  • How the joints are reached, and at what height

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to speak to us on 01277 525 020 or send photos by email with what you know.

Questions about River

Can you work on a hospital site such as Midhurst Community Hospital?

Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.

Is River off your patch?

No. Places such as River are covered as much as the big towns. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.

How do I request a quote?

There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.

Are you fully insured?

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

Will you just go over the old sealant?

No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.

Does weather matter for sealant work?

For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.

What about RAMS and site documents?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.

Commercial clients in River

When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Building owners and managing agents use us on everything from one building to a spread of sites. One quote can cover more than one site, so there’s one set of paperwork to deal with.

Building and refurbishing in River

The South East is one of the drier parts of the UK. Winter mornings still bring frost and condensation on frames and panels, so external mastic is timed for workable conditions and agreed with the site manager. Central London is about 42 miles from River. Towns within reach of London tend to keep building, from flats to offices and schools, which keeps mastic packages in demand.

With historic properties like Petworth House, 2.4 miles east of River, in the area, refurbishment work often meets old masonry that needs compatible sealants. Hospital estates such as Midhurst Community Hospital (to the west of River) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.

River is about 12 miles east of Petersfield, in West Sussex. Commercial clients in River use us for work on facade joints. Across West Sussex, 373 places are covered, including River. Our Portsmouth page has more on work in that area (22 miles or so).

If you need facade sealing in GU28, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Nearby places we also cover include Upperton (1 mile east), Selham (2 miles south), Tillington (2 miles south-east), South Ambersham (2 miles south-west) and Hampers Green (2 miles east) for facade joints. Nearby towns on our patch include Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south-east), Rustington (15 miles south-east), Storrington (11 miles south-east) and Billingshurst (9 miles east).

Around River

Around River, our work takes us to commercial buildings near The Hollist Arms Public House and the streets around them. Well-known places in the area include Lodsworth Castle (1.3 miles south) and Coultershaw Heritage Site (3 miles south-east). Not far away are Graffham Common and Blackdown.

Map of River © OpenStreetMap contributors

What happens if it’s left?

Patch repairs over old sealant tend to come back. A full cut-out and reseal costs more on the day but lasts much longer and avoids repeat call-outs. One visit to deal with every failing joint makes more sense than several trips to a place like River, rather than one at a time. Photos of every joint help us quote for the whole job.

The price depends on the quantity of joints, how much old material needs removing and the access. Call for a fixed quote when you are ready.

Why clients in River choose us

  • Products installed to the manufacturer’s instructions
  • Fully insured
  • One phone line for London, the South East and Scotland
  • CSCS-carded applicators

See our cost guide and how we’re accredited.

Accreditations

Trusted. Accredited. Insured.