Hertford mastic sealing
Mastic sealing for building owners, managing agents and housing associations throughout Hertford and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.
- Water getting in round frames after rain
- Old repairs sealed over failed mastic
- Communal area joints that look neglected
Mastic sealing near Hertford
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
FAQs: Hertford
Will you price a mastic programme across our Hertford portfolio?
Yes, we quote for single buildings and for programmes across several blocks. Residents are given notice through you, and the work moves building by building.
Do you work for managing agents with blocks near Hertford East station?
Yes, and several blocks can go on one quote. Send the address, photos of the elevations and your access arrangements, and we will give a fixed quote.
What if the old mastic contains asbestos?
In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.
Do you guarantee the mastic work?
Our workmanship carries a 12-month guarantee and we hold public liability insurance.
Do you work in Hertford?
Yes. Sites across Hertford are covered, with one number for every area we cover.
Can you send RAMS and CSCS details before starting?
We are CHAS accredited, a Constructionline member and carry public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
Can you follow the specification on our project?
Yes. The specification and the manufacturer’s installation guidance are what we work to.
Mastic sealing in Hertford
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Communal entrances and stairs stay usable throughout. Site teams most often ask us about draught complaints from residents or tenants and no planned programme for sealant, on communal entrances and stairwells, communal kitchens and washrooms and window and door perimeters on blocks. A specialist sealant contractor works differently from a general builder: in Hertford, that means joint design, primers and backing rod as standard.
Housing associations in towns like Hertford often run planned maintenance by estate or by block. Residents are notified through the association, and work moves building to building.
Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- Hertford (SG14, SG13)
- Wider area
- Hertfordshire
- Cover
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Diagnose, treat, sign off
In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. If you have more than one building in Hertford, they can often be done on the same visit, with one quote covering them. Give us your access times and we’ll fit the work in.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
Preparing the site
- Agree which areas must stay open
- Tell us your opening times and when work is allowed
- Point out parking and an unloading spot
Getting a fixed quote
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Related advice
Frames, entrances and external joints in Hertford
Hertford is in the South East, one of the UK’s drier regions. External mastic still waits for dry faces and the right temperature, while the elevations that take the most sun tend to show hardened mastic first. Central London is about 21 miles from Hertford. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres; their frame mastic often ages block-wide.
If you look after a block within reach of Hertford East station, which lies east of Hertford, frame and balcony mastic can be renewed on one programme. Site managers at schools like Mill Mead Primary School can fit frame mastic into the summer works.
Hertford is about 9 miles south-east of Stevenage, in Hertfordshire. Businesses, contractors and managing agents in Hertford use us for work on mastic joints. Across Hertfordshire, 371 places are covered, Hertford among them. Our London page has more on work in that area.
Business premises anywhere in SG14 and SG13 are within our area. We cover commercial and managed buildings on Salisbury Square, Market Street and Parliament Square and the roads nearby. Being close to the A10 and A119, Hertford is straightforward for us to reach. Nearby places we also cover include Horns Mill (1 mile south), Foxholes (1 mile east), Rush Green (2 miles east), Hertford Heath (2 miles south-east) and Little Amwell (2 miles south-east) for mastic joints. Bigger towns within reach include Stevenage (9 miles north-west), St Albans (11 miles west), Bishop's Stortford (11 miles north-east), Welwyn Garden City (5 miles west), Harpenden (12 miles west) and Hitchin (13 miles north-west).
Near you in Hertford
We work on buildings around The Old Barge pub and Richard Hale School. There’s a railway station in Hertford itself: Hertford East station. A little further out are Hertford County Hospital (under half a mile south-west) and Mcmullen & Sons Brewery Museum (less than half a mile south-west). Open spaces near Hertford include Willowmead.
Places near Hertford
More services for Hertford
What we can’t put right
Some faults sit outside our scope, and we say so rather than covering them up:
- Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
- Failed window or door frames, which need a window contractor
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
If you’re not sure, just speak to us on 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer.
Joints and surfaces we work on
- External wall and movement joints
- Balcony and threshold joints
- Window and door perimeters on blocks
- Communal kitchens and washrooms
- Communal entrances and stairwells
- Shopfronts below residential blocks
Keeping the joints sound
Problems stay small when the joints are checked regularly. Specifically:
- Have the asbestos survey to hand for older buildings
- Look at the sunniest and most exposed elevations first
- Log resealing dates block by block
- Keep bins and bikes away from communal door frames
Keep records of when each building was resealed. It helps plan the next round and shows what was done.
Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.
Surface by surface
Planned maintenance
How long mastic lasts depends on exposure, movement and the product used. Inspecting joints regularly keeps programmes on track.
Communal areas
Communal areas stay in use while we work. We work in sections so access is never blocked.
Do you need mastic sealing in Hertford?
In communal areas, joints take knocks from bins, bikes, buggies and deliveries, and low-level joints get damaged. Regular cleaning wears them further.
These are often picked up first by site or facilities staff:
- Mastic failing across several blocks on an estate
- Open joints in brickwork or panels
- A mix of products and colours from past repairs
- No planned programme for sealant
Owners of student blocks near University of Hertfordshire, 4.8 miles to the south-west of Hertford, can schedule frame and external mastic for the summer vacation.
Questions to ask before you book
- Will CSCS-carded applicators be on site?
- How they’ll work around occupants
- Will RAMS and insurance details be available?
- Whether old or failed sealant will be cut out, not overlaid
What affects the price in Hertford
A fixed quote reflects the actual work. It takes account of:
- Quantities, in metres or numbers
- Phasing around occupants
- Which sealant the job calls for
- Distance, for remote addresses
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’ll put a fixed figure on it.
Before you send an enquiry
There’s no need for a formal survey. These details are enough to start:
- Approximate linear metres or a joint schedule
- The product your specification calls for
- Anything awkward about access or site hours
- Any dates the work must fit around
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 use the quote form with what you know.