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

Facade and window perimeter sealing in Foxholes, Hertfordshire

Planning work on a facade joint in Foxholes? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Facade joints cracked through the middle
  • Patch repairs that keep failing
  • Cold air coming in at window perimeters
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Facade sealing across Foxholes

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

How we handle facade sealing in Foxholes

We are often asked to look at water coming in around frames. Very often the perimeter bead has cracked or lost its grip. If the evidence points away from the sealant, we say so before quoting. We work on perimeter joints where frames meet the structure, stone and brick facade joints and shopfront frames, and the usual reasons a site gets in touch are sealant pulling away from frames or panels and perimeter joints where frames meet the structure. A specialist sealant contractor works differently from a general builder: on jobs in Foxholes, preparation and product choice get the time they need.

Around places like Foxholes, 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.

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

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
Foxholes (SG13)
Region
Hertfordshire
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Call
01277 525 020
Last updated
3 November 2026

When to bring in a specialist

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong usually costs more in the end than doing them right.

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

Our process

Before we leave any area, we remove the tape, clean down and inspect every joint with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. Several jobs near Foxholes can be grouped on one trip. Mention the building’s opening times and we’ll work within them.

  1. We look at the joints, the drawings and the access before pricing.
  2. Failed sealant is cut out along its full length.
  3. Both faces are cleaned and, where the product needs it, primed.
  4. Closed-cell rod fixes the depth, and the sealant grips two sides only.
  5. The new sealant goes in and is tooled firmly onto both faces.
  6. We walk the finished joints with you before handing over.

Preparing the site

  • Let building users know which areas are affected
  • Agree which areas must stay open
  • For older buildings, check the asbestos register before work

Request a quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or use the quote form.

Get a quick quote

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Mastic packages on Foxholes sites

Central London is about 20 miles from Foxholes. Construction around the commuter belt mixes station-side flats with refurbished offices and units, and each scheme needs its mastic sealed to programme. The South East is one of the drier parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so external mastic is timed for workable conditions and agreed with the site manager.

School extensions, at buildings such as Wheatcroft Primary School, typically run to the summer holidays, mastic included. Extensions at sites like Hertford County Hospital (to the west of Foxholes) typically sit beside working departments, and the mastic follows strict access rules. New units and refits on sites such as Taylor Trading Estate (0.7 miles north of Foxholes) need their panel and perimeter joints sealed to the specification.

Foxholes is about 1 mile east of Hertford, in Hertfordshire. Anywhere in SG13, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Our Hertfordshire coverage takes in 371 places. There’s a separate page for London, roughly 20 miles from Foxholes.

Anyone looking for facade sealing in SG13 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on Ware Road, London Road and Fairfax Road or close by, we can quote for facade joints. Nearby places we also cover include Rush Green (1 mile north-east), Hertford Heath (1 mile south-east), Hertford (1 mile west), Little Amwell (1 mile south-east) and Horns Mill (1 mile south-west). Further afield, our area takes in Stevenage (10 miles north-west), St Albans (12 miles west), Bishop's Stortford (10 miles north-east), Welwyn Garden City (6 miles west), Harpenden (13 miles west) and Hitchin (14 miles north-west).

What’s near Foxholes

We work on buildings around Simon Balle All-Through School, The Saracens Head Public House and Hertford Regional College, among other places. Foxholes’s nearest station is Hertford East station, roughly 0.8 miles north-west. A little further out are Hertford County Hospital (1.5 miles west) and Mcmullen & Sons Brewery Museum (1.2 miles west). Not far away are King's Meads.

Map of Foxholes © OpenStreetMap contributors

For managing agents and facilities managers

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.

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

Maintenance after handover

A few simple habits keep the new joints working:

  • Clear debris that holds water against joints
  • Inspect facade joints on a regular cycle
  • Brief window cleaners about newly sealed joints
  • Don’t wait for a second leak before calling

Hold back any cleaning crew until the joints have had their stated cure time. Keep high-pressure jets and strong chemicals away from new sealant, so brief your window cleaners.

In pre-2000 buildings, check the asbestos register before old sealant is cut out. Older sealants can contain asbestos, and work stops until it’s tested if it’s suspected.

What sets the cost

Before we quote, we look at:

  • The site’s rules and procedures
  • Distance, for remote addresses
  • Access and working height
  • Whether old sealant has to be cut out first

We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote.

What to include in your enquiry

We can often quote from photos and a few details. Please tell us:

  • The type of building and who uses it
  • The postcode of the building
  • Whether an asbestos survey exists
  • Rough lengths or quantities, or drawings if you have them

The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or phone 01277 525 020 or email the details over if you’d rather talk the job through.

What the job involves on each surface

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.

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.

Your questions answered

Does your area include sites such as Taylor Trading Estate, near Foxholes?

Yes. Our area takes in Foxholes and its surroundings, with estates and business parks such as Taylor Trading Estate included. To start, just speak to us on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.

Is a smaller place like Foxholes 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.

How do you choose the sealant?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Do you provide access for facade work?

We agree access with the client at the start. Tell us about access: existing scaffold, what you’re arranging and any site restrictions, and we’ll price the work around it.

Is it fine to apply new sealant on top of old?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

Are your applicators CSCS-carded?

Yes. If you need card details for site access, let us know and we will send them with the quote.

Can you work to our specification?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

Accreditations

Trusted. Accredited. Insured.