Fire Stopping in High Wych
Fire-rated and intumescent sealing of service penetrations and linear gaps across High Wych, by CSCS-carded applicators. CHAS accredited and fully insured.
- Snag lists that include open service penetrations
- Openings left by services added after handover
- Fire seals cut back for extra cables and never reinstated
Need fire stopping in High Wych?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our fire stopping in High Wych
The test standards are BS EN 1366-3 for penetration seals and BS EN 1366-4 for linear joints. That classification, such as EI 60 or EI 120, belongs to the product in its tested arrangement. Reproducing the tested arrangement on site is the part we take care of. If you have fire-stopping items raised at inspection or handover and fire-rated sealant that has cracked or shrunk back, we can help, on service gaps in risers, joints between fire-resisting walls and floors and cable penetrations alike. A single leaking joint is often how a building in High Wych first comes to us: we look at the rest while we are there and tell you what we find.
Rural conversions around High Wych can put new fire-resisting partitions inside older structures. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.
Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Location
- High Wych (CM21)
- Wider area
- Hertfordshire
- Cover
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Keeping the joints sound
After handover, a little attention goes a long way:
- Record which product was used where
- Check with the data sheet before painting over fire sealant
- Put resealing into every M&E and fit-out package
- Foam or ordinary sealant is never a fire-seal repair
Never top up a fire seal with foam, ordinary silicone or filler. A repair should use the original product, installed the same way, or a new specification from the designer.
Keep a register of where seals are and what they are made of. When a new service goes through, everyone knows which product and detail to match, and it helps at inspections.
Should maintenance staff do it?
What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
Redoing a failed joint typically costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Our process
We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. If others near High Wych need work, visits can be combined, which keeps travel down. You’ll have a fixed quote before work starts.
- First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Unsuitable fillers and loose debris are taken out of each opening.
- Mineral wool or other backing goes in wherever the detail asks.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Getting the site ready
- Share your working hours and any access restrictions
- Move anything stored against the joints
- Let building users know which areas are affected
Ask for a quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to call the office on 01277 525 020 or send details through our quote form with what you know.
Advice
High Wych: questions and answers
Will you take on work at estates like Riverside Business Park, close to High Wych?
Yes. We cover High Wych and the area around it, including industrial estates, business parks and retail parks such as Riverside Business Park. A few photographs and the unit address let us price the work.
Can work at a site such as Harlow College fit around teaching?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Are you fully insured?
Yes. Mastic Doctor is fully insured, public liability included.
When can the area be used after sealing?
That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we will confirm the curing time on the day.
What does an EI 60 rating mean?
BS EN 1366-3 covers penetration seals and BS EN 1366-4 covers linear joints. Classification follows BS EN 13501-2. That rating only holds when the product is installed to its tested detail.
How long does a typical visit take?
It depends on the scope, though a typical visit normally takes anything from one day to a planned run of visits, depending on the number of seals and the access. For bigger or phased jobs, we will set out a timescale with the quote.
What about RAMS and site documents?
Requirements differ from site to site, so list what you need, whether RAMS, insurance or CSCS details, and we will confirm with the quote.
Service penetrations in High Wych buildings
High Wych lies roughly 23 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls. A 2-mile radius around High Wych takes in a number of hotels. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close.
In a retail centre such as Harlow Retail Park, 1.7 miles to the south of High Wych, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail. Offices at parks like Riverside Business Park (to the south-east of High Wych) are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail. Hospital estates such as Rivers Hospital, 0.6 miles east of High Wych, are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.
High Wych is about 3 miles north of Harlow, in Hertfordshire. We cover commercial sites throughout High Wych. Our Hertfordshire coverage takes in 371 places, large and small. We also cover London, some 23 miles away.
We cover the CM21 postcode districts for service penetrations. We cover commercial and managed buildings on Mansfield, High Wych Lane and Broadfields and the roads nearby. Close to High Wych, our area also takes in Sawbridgeworth (1 mile east), Lower Sheering (2 miles east), Allen's Green (2 miles north), Spellbrook (2 miles north-east) and Sheering (3 miles east). Further afield, our area takes in Stevenage (15 miles north-west), Bishop's Stortford (4 miles north), Welwyn Garden City (14 miles west), Hoddesdon (7 miles south-west), Cheshunt (10 miles south-west) and Hatfield (15 miles west).
What’s near High Wych
Locally, jobs take us to sites close to The Half Moon Public House, Leventhorpe and Gibberd Garden and the streets around them. High Wych’s nearest station is Harlow Mill station, roughly 1.3 miles south. A little further out are Harlow Mill (1.3 miles south) and Princess Alexandra Hospital (3 miles south-west). Open spaces near High Wych include Sawbridgeworth Marsh.
How the job changes by surface
Metal pipes
Metal pipes conduct heat, so their details often call for extra measures along the pipe, and some details add wrapping or a set length of insulation. If the detail needs something beyond sealant, we tell you.
Risers and ceiling voids
Risers and ceiling voids hold most of a building’s service penetrations. Access is often tight, so we agree it with you in advance along with any permits your site needs.
Work for main contractors and building owners
CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.
When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
Nearby places to High Wych
Other services in High Wych
What affects the price in High Wych
These are the things that shape the price:
- Travel to remote or island sites
- Removal of failed or old sealant
- Quantities, in metres or numbers
- The product specified
We don’t publish prices, since every building and every scope is different. Call for a quote.
Before you send an enquiry
A good diagnosis starts with the right details. Let us know:
- How the joints are reached, and at what height
- Whether an asbestos survey exists
- Drawings or a marked-up plan, if available
- Where the site is, with the postcode
Send us photos, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.