Facade Sealing in The Folly
Sealant work in The Folly for main contractors, managing agents and facilities managers: facade joint and window perimeter sealing on commercial buildings, with a fixed quote first.
- New sealant peeling off old mastic
- Perimeter joints where frames meet the structure
- Perimeter sealant that has split or peeled away
Facade sealing for businesses in The Folly
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
When it isn’t the sealant
Honesty saves time and money. New sealant won’t cure:
- Replacing glass or failed glazing units
- Joints whose design needs changing by the specifier
- Render or concrete edges that have broken away
Not sure which it is? You can call the office on 01277 525 020 or email a schedule or drawings and we will tell you honestly.
What we seal
- Cladding panel joints
- Stone and brick facade joints
- Shopfront frames
- Window and door perimeters
- Coping and flashing joints
- Perimeter joints where frames meet the structure
Facade sealing for commercial buildings in The Folly
Access is part of every facade job, and we plan it with you before quoting. Let us know what access exists or is planned, and any site rules we need to work around, and we’ll fit the work around it. We work on coping and flashing joints, stone and brick facade joints and shopfront frames, and the usual reasons a site gets in touch are unsightly perimeter sealant on a visible elevation and old perimeter mastic that has dried out. Most enquiries from The Folly start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Sites around smaller places like The Folly can be a fair drive from suppliers, so we come with everything the package needs, timed to the stage the job has reached. Send drawings or photos and the programme and we will quote to suit.
Every job we finish is backed by a 12-month workmanship guarantee. If our installation lets you down in that time, we return and fix it.
- Where
- The Folly (AL4)
- Wider area
- Hertfordshire
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Work for main contractors and building owners
CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.
From enquiry to sign-off
We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. Rural sites near The Folly may need directions, gate codes or a contact on site. Add it to your enquiry and we’ll build it into the plan.
- First we review photos, drawings or what we saw on a visit, and agree how each joint will be reached.
- Failed sealant is cut out along its full length.
- Both faces are cleaned and, where the product needs it, primed.
- Backing rod, or bond-breaker tape in shallow joints, limits the depth.
- A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
- The completed runs are checked with you, then the 12-month guarantee applies.
Before we start on site
- Let us know about inductions and permits
- Share the asbestos register for older buildings
- Tell staff and tenants when we’ll be in
Request a quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call 01277 525 020 or email a schedule or drawings.
Advice
Keeping the joints sound
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:
- Don’t wait for a second leak before calling
- Record the product and colour used on each elevation
- Add perimeter sealant to planned maintenance checks
- Avoid harsh cleaners on facade sealant
If new signage, brackets or services are fixed through a sealed joint, the seal needs making good. Make sure the joint is resealed afterwards using a matching sealant.
Tie resealing in with redecoration, cladding repairs or other access. One set-up for several trades saves money and limits disruption.
New build and refits around The Folly
The Folly 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, so external mastic is timed for workable conditions and agreed with the site manager. At about 24 miles from central London, The Folly is within reach of the capital. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and main contractors there need mastic that keeps to the programme.
On a healthcare site such as Harpenden Memorial Hospital, which lies west of The Folly, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. With historic properties like Shaw's Corner, 2 miles north-east of The Folly, in the area, refurbishment work often meets old masonry that needs compatible sealants.
The Folly is about 2 miles east of Harpenden, in Hertfordshire. Any commercial site in The Folly is covered, for single jobs and planned programmes alike. Our Hertfordshire coverage takes in 371 places, from busy centres to rural villages. London is covered too, around 24 miles from The Folly.
Business premises anywhere in AL4 are within our area for facade joints. Among the streets we cover are Folly Fields and Lower Luton Road. If your building is just outside The Folly, we cover Lea Valley (1 mile west), Amwell (1 mile south), Mackerye End (1 mile north-west), Blackmore End (1 mile north) and Batford (1 mile west). Nearby towns on our patch include Watford (11 miles south), Hemel Hempstead (8 miles south-west), Stevenage (8 miles north-east), St Albans (5 miles south), Welwyn Garden City (5 miles east) and Hitchin (9 miles north).
What’s near The Folly
Around The Folly, our work takes us to commercial buildings near Sir John Lawes School and The Cherry Trees pub and the streets around them. The nearest railway station is Harpenden station, about 2 miles west of the centre. A little further out are St Albans City Hospital (4.2 miles south) and Harpenden Museum (2.2 miles west). The countryside around The Folly includes Wheathampstead Local Nature Reserve.
Signs you need facade sealing in The Folly
Overlaying old sealant is a common shortcut that fails quickly. Fresh silicone won’t stick to cured silicone, so the new bead peels away within a season or two.
Site and facilities staff are often the first to spot these:
- Sealant pulling away from frames or panels
- Weathered joints at frame-to-structure perimeters
- Water coming in around window frames
- Hard, chalky sealant that no longer flexes
When a school such as St Helen's Church of England Primary School is extended or refurbished, the mastic package is often squeezed into the holidays.
Comparing quotes
- How the joint faces will be prepared and primed
- The terms of the workmanship guarantee
- What level of public liability insurance do they hold?
- Which product they’ll use, and why it suits the joint
Common questions from The Folly clients
Can you work at a site such as Southdown Industrial Estate, by The Folly?
Yes. Our area takes in The Folly and its surroundings, with estates and business parks such as Southdown Industrial Estate included. Send details of the unit and the work through our quote form for a quick quote.
Is The Folly too far out for you?
No. Small places get the same service as large ones. We cover Greater London and the counties of the South East. We plan jobs in smaller places so return trips are kept to a minimum.
Do you provide access for facade work?
That varies with the building and the access on offer. Share what access exists or is planned when you send details.
Can you work while the building is occupied?
Yes, with some planning. We agree a sequence with your contact so just one area at a time is disrupted.
Is it okay to overlay old mastic?
No. A bead run over old sealant soon lifts. Our method is a full cut-out, cleaning, backing and a new bead.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to.
Can you handle several sites?
Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.
Places near The Folly
Other services in The Folly
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, often a low-modulus silicone or hybrid.
Perimeter joints at frames and structure
Where framed systems such as shopfronts meet the building structure, there is a perimeter joint to seal. Our work is that perimeter joint rather than the system it surrounds.