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

Facade and window perimeter sealing in Rickmansworth, Hertfordshire

Facade joint and window perimeter sealing on commercial buildings in Rickmansworth and across Hertfordshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Weathered joints at frame-to-structure perimeters
  • Cold air coming in at window perimeters
  • Unsightly perimeter sealant on a visible elevation
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS accredited
£5m PL insurance

Facade sealing for Rickmansworth sites

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

Facade sealing in Rickmansworth, done properly

We are often asked to look at water coming in around frames. Failed perimeter sealant is a frequent cause, though that isn’t the only cause. We’ll tell you if we think the leak is coming from somewhere sealant won’t fix. If you have hard, chalky sealant that no longer flexes and air leaks through failed facade joints, we can help. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Rickmansworth, preparation and product choice get the time they need.

In towns like Rickmansworth, sites are typically modest: small housing schemes, extensions to schools and surgeries, refurbished shops and offices. A mastic package on a smaller site still needs the same care at window perimeters and facade joints.

We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant.

Where
Rickmansworth (WD3, WD18)
Region
Hertfordshire
Cover
12 months on every job
Quotes
Quoted before any work starts
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Facade sealing around Rickmansworth: what changes locally

Rickmansworth lies roughly 19 miles out from central London. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, which keeps mastic packages in demand. Rickmansworth is in the South East, one of the UK’s drier regions. Winter mornings still bring frost and condensation on frames and panels, which is why external dates are agreed with the site manager.

For contractors at a school such as Saint Joan of Arc Catholic School, sealing has to be finished before term starts. Older buildings in the area around Rickmansworth, such as Chenies Manor House, 3.7 miles north-west of Rickmansworth, need care when sealed: the product has to suit soft or historic materials.

Rickmansworth is about 3 miles south-west of Watford, in Hertfordshire. Commercial clients in Rickmansworth can call on us for facade joints. Our Hertfordshire coverage takes in 371 places. Sites around London have their own page, roughly 19 miles from Rickmansworth.

We take on facade joints across the WD3 and WD18 postcode area. Streets here include High Street, Station Road and London Road. Rickmansworth sits on or close to the A404 and A412, which helps when planning parking and deliveries for the job. If your building is just outside Rickmansworth, we cover Batchworth (1 mile south), Chorleywood West (1 mile north-west), Croxley Green (1 mile north-east), Mill End (1 mile west) and Woodcock Hill (1 mile south). Nearby towns on our patch include Watford (3 miles north-east), Hemel Hempstead (8 miles north), St Albans (10 miles north-east), Harpenden (13 miles north), Hatfield (13 miles north-east) and Borehamwood (8 miles east).

Around Rickmansworth

In Rickmansworth, that means premises near Rickmansworth Park Junior Mixed and Infant School, Rickmansworth Park and The Coach And Horses Public House and the streets around them. Rickmansworth has its own railway station: Rickmansworth station. Nearby you’ll also find Chiltern Open Air Museum (3.2 miles west) and Charter Place (3.2 miles east). Open spaces near Rickmansworth include Chorleywood Common and Tumbling Bay.

Map of Rickmansworth © OpenStreetMap contributors

Why deal with it now?

The longer a failed joint is left, the more the substrate suffers: edges get wet, render and timber deteriorate and frames can move. Early action keeps it simple. In a town like Rickmansworth, a split, stained or mouldy joint is often the first thing visitors notice. Fresh sealant makes a building look maintained.

We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote and we will price your job on its own details.

Why clients in Rickmansworth choose us

  • Fixed quotes based on photos, drawings or a visit
  • Old sealant cut out, never sealed over
  • CHAS accredited
  • 12 months’ guarantee on every job

Read how commercial sealant jobs are priced and how we’re accredited.

When something else is needed

Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is one of these:

  • Water getting in through cracked render or porous masonry
  • Movement beyond what any sealant can handle
  • Replacing glass or failed glazing units

If you’re not sure, just phone 01277 525 020 or send photos by email and we will give you a straight answer before you book.

Surfaces we seal

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

Maintenance after handover

Problems stay small when the joints are checked regularly. Specifically:

  • Record the product and colour used on each elevation
  • Inspect facade joints on a regular cycle
  • Plan facade sealing alongside redecoration
  • Check that rainwater leaves the facade the way it was designed to

Record the sealant type and date on the building file. Future work can then match the product and colour without guesswork.

Don’t wait for a full elevation to fail. Small repairs stop small leaks becoming large ones inside the building.

How the job changes by surface

Window and door perimeters

Window and door perimeters make up most facade sealing work. A low-modulus neutral-cure product, chosen for the frame and wall, goes in, tooled to shed water.

Precast concrete panels

Precast panel joints have to absorb thermal and structural movement. A sealant of the right movement class goes in over backing rod.

What we’re called out for in Rickmansworth

Not every failure is in the sealant: crumbling render, spalling concrete or flaking paint take the sealant with them. We tell you when the edges need repairing before resealing.

Look out for the following:

  • Failed sealant on precast panel joints
  • Unsightly perimeter sealant on a visible elevation
  • Draughts around frames and panels
  • Facade joints cracked through the middle

New wings at hospitals like Harefield Hospital (2.4 miles south of Rickmansworth) bring long runs of window and panel joints to seal.

What your quote should include

  • Health and safety accreditation such as CHAS
  • How they’ll work around occupants
  • The terms of the workmanship guarantee
  • How joint depth will be controlled

Choosing a commercial sealant contractor

Our process

Diagnose, treat, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. In a town such as Rickmansworth, most jobs are single buildings. We start with your photographs, drawings or a site visit, then send a fixed quote.

  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. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

Preparing the site

  • Agree which areas must stay open
  • Tell staff and tenants when we’ll be in
  • Share the asbestos register for older buildings

Quotes

A handful of photographs and a postcode is the fastest way to a quote. Upload them with the quote form, or call the office on 01277 525 020 or use the quote form if you’d rather talk the job through.

Get a quick quote

Read more

FAQs: Rickmansworth

Can you take on a job at a hospital such as Harefield Hospital?

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

Do you cover business parks and estates near Rickmansworth, such as Peerglow Industrial Estate?

Yes, sites like Peerglow Industrial Estate are within our area, along with the rest of Rickmansworth. A few photographs and the unit address let us price the work.

When can you be on site?

We are in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.

Do you cover Rickmansworth?

Yes. We take on work across Rickmansworth, with one number for every area we cover.

Will your applicators have CSCS cards?

Yes. Should the site need card details in advance, let us know and we’ll send them with the quote.

How long does a typical visit take?

That varies with the scale of the job, though a typical visit usually takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. For bigger or phased jobs, we will set out a timescale with the quote.

Do you seal facades in winter?

Year-round work is possible as long as joints are dry and temperatures suit the product. Cold, damp mornings can delay a start.

Accreditations

Trusted. Accredited. Insured.