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

Facade Sealing in Runwell

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

  • Air leaks through failed facade joints
  • Perimeter joints where frames meet the structure
  • Discoloured or dirty facade joints
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Facade sealing near Runwell

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Common questions from Runwell clients

Is Runwell too small for you to travel to?

Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.

Is Cricketers Retail Park, near Runwell, within your area?

Yes, sites like Cricketers Retail Park are within our area, along with the rest of Runwell. A few photographs and the unit address let us price the work.

Can you handle several sites?

Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.

Do you use silicone for external joints?

The product follows the joint’s movement, the surfaces and the specification. BS EN 15651 Parts 1 and 2 cover facade and glazing sealants, and specifications often name them and we follow the specified product.

Do you run new sealant over the existing bead?

No. New sealant won’t hold on old sealant, so the old bead is cut away and the joint cleaned back to sound material. That is what makes the new joint last.

Are you CHAS accredited and on Constructionline?

Yes. We are CHAS accredited and a Constructionline member, which helps with supplier vetting.

How do we ask for a quote?

You can use the quote form on this site; alternatively, call the office on 01277 525 020 or email us. Photos, drawings or a joint schedule help us quote quickly.

Facade sealing in Runwell

Some clients need every window on a block resealed; others need a few leaking frames sorted. Either way, the method is the same: old sealant out, faces cleaned, depth set and a new bead tooled in. Each job carries our 12-month guarantee. Site teams most often ask us about hard, chalky sealant that no longer flexes and air leaks through failed facade joints, on window and door perimeters, coping and flashing joints and cladding panel joints. Facilities teams, main contractors and managing agents in Runwell tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Around places like Runwell, a lot of construction is the conversion of older buildings, and the sealant at those junctions has to cope with two materials that move differently, 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 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
Location
Runwell (SS11)
Region
Essex
Guarantee
12 months on every job
Quote
A fixed quote before we start
Phone
01277 525 020
Page updated
3 November 2026

What sets the cost

Sealant work doesn’t have a standard rate, because every site is different. What we take into account:

  • Removal of failed or old sealant
  • The product specified
  • Joint width, depth and condition
  • Distance, for remote addresses

Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • Photos of the joints, close up and from further back
  • Approximate linear metres or a joint schedule
  • When you need the work done
  • Whether the building will be occupied during the work

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, give us a call on 01277 525 020 or email us.

General trades versus a specialist

Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.

On site: what to expect

Before any cutting starts, the area is protected: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work usually takes a day or two for a few elevations, and longer where access has to be moved around the building, and we clear our waste as we work. Work in places the size of Runwell is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.

  1. We plan access and the order of elevations with the client.
  2. Weather and temperature are checked against the product’s limits.
  3. We remove the old bead and check the edges are sound.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. Once signed off, the work carries our 12-month guarantee.

Preparing the site

  • Share the asbestos register for older buildings
  • Tell us what induction or permit system the site runs
  • Arrange parking or a loading space

Quotes

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, ring 01277 525 020 or use the quote form.

Get a price

Advice

Leave it or put it right?

Scaffold or access already on site makes resealing much simpler. Coordinating facade sealing with other external works avoids paying for access twice, which is often the biggest saving. Sealant hardens, cracks and loses grip with age, UV and movement. Renewing it in good time keeps the building weathertight.

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

Why clients in Runwell choose us

  • Fully insured
  • Constructionline member
  • A fixed quote before work starts
  • One phone line for London, the South East and Scotland

See how commercial sealant jobs are priced or how we’re accredited.

When it isn’t the sealant

A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is any of the following:

  • Render or concrete edges that have broken away
  • Water getting in through cracked render or porous masonry
  • Joints too narrow for the movement they take, which need redesign

If you are not sure, just give us a call on 01277 525 020 or email drawings and photos and we’ll give you a straight answer before you book.

Joints and surfaces we work on

  • Coping and flashing joints
  • Perimeter joints where frames meet the structure
  • Cladding panel joints
  • Window and door perimeters
  • Shopfront frames
  • Stone and brick facade joints

Building and refurbishing in Runwell

A 2-mile radius around Runwell takes in a number of hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. Runwell is about 28 miles from central London. Construction around the commuter belt mixes station-side flats with refurbished offices and units, which keeps mastic packages in demand.

When units on a site such as Cricketers Retail Park, 2.5 miles south-west of Runwell, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. New wings at hospitals like Mayflower Community Hospital, 5.2 miles west of Runwell, bring long runs of window and panel joints to seal.

Runwell is about 1 mile north of Wickford, in Essex. Runwell sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Across Essex, 644 places are covered, Runwell among them. Our London page has more on work in that area.

We cover the SS11 postcode districts for facade joints. If your site is on Church End Lane, Viking Way and Canewdon Gardens or close by, we can quote for facade joints. We also cover Wickford (1 mile south), Brock Hill (1 mile north-west), Shotgate (2 miles south-east), Battlesbridge (2 miles east) and South Hanningfield (2 miles north) for facade joints. Further afield, our area takes in Chelmsford (8 miles north), Basildon (5 miles south-west), Brentwood (9 miles west), Maldon (10 miles north-east), Canvey Island (7 miles south) and Billericay (4 miles west).

Near you in Runwell

In Runwell, that means premises near Beauchamps High School and Quart Pot pub and the streets around them. For rail, the closest station is Wickford station, roughly 0.7 miles south-west of the centre. Well-known places in the area include Rayleigh Castle (4.2 miles south-east) and Battlesbridge Motorcycle Museum (1.9 miles east). The countryside around Runwell includes Shotgate Thickets.

Map of Runwell © OpenStreetMap contributors

Signs you need facade sealing in Runwell

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.

Common reasons buildings call us in:

  • Cold air coming in at window perimeters
  • Water coming in around window frames
  • Cladding panel joints that have opened up
  • Hard, chalky sealant that no longer flexes

School extensions, at buildings such as Runwell Community Primary School, normally run to the summer holidays, mastic included.

Comparing quotes

  • How they’ll work around occupants
  • The terms of the workmanship guarantee
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will failed sealant be removed rather than covered?

Questions to ask before you appoint anyone

Accreditations

Trusted. Accredited. Insured.