Hertfordshire · England
External & façade joints in Daw's End, Hertfordshire
Sealing brickwork movement joints, render, cladding and façade joints for Daw's End, backed by a 12-month guarantee. Call for a quick quote.
- Sealant that has lost its bond to the brick or render
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
How to look after the new joints
So the new joints stay in good condition:
- Fix overflowing gutters above sealed joints
- Act on the first splits you see
- Make sure movement joints aren’t pointed over
- Check external joints each spring
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants aren’t designed to be painted and spoil the finish.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
About our external mastic in Daw's End
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. We work on concrete & block, copings & trims and render & cladding joints, and common reasons people get in touch are joints where the bead has come unstuck and joints pointed up with cement by mistake.
Around Daw's End, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in.
All of our work is guaranteed for twelve months, in Daw's End and everywhere else we cover.
- Location
- Daw's End (SG9)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Daw's End buildings and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Anstey First School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Daw's End is in Hertfordshire. If you need external mastic in Daw's End, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover Hertfordshire, Daw's End included. We cover 381 towns and villages across Hertfordshire. There’s also a page for Chelmsford, about 25 miles away.
All of SG9 is within our area for external mastic, from the main roads to the quietest streets. We also cover Anstey (1 mile north), Great Hormead (1 mile south), Wyddial (2 miles west), Brent Pelham (2 miles south-east) and Lower Green (2 miles north-east). We also work in nearby towns such as Stevenage (11 miles south-west), Bishop's Stortford (9 miles south-east), Hitchin (13 miles west), Hoddesdon (15 miles south), Hertford (13 miles south-west) and Letchworth (11 miles west).
Around Daw's End
Locally, jobs take us to homes and businesses close to The Blind Fiddler pub. Other landmarks nearby include Anstey Hales Farm (0.6 miles north-east). Not far away are Hawkins Wood.
FAQs for Daw's End
Do you cover smaller places like Daw's End?
Yes. Daw's End is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is there a guarantee on external mastic in Daw's End?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
When is the sealant fully cured?
It depends on the product. Before we leave, we will tell you the cure time.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
Is it OK to fill a movement joint with cement?
No. Rigid materials cannot move with the wall. If it has already been filled, we can normally cut it out and reseal it.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Where a wall is exposed, as many are in small places like Daw's End, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
Why us?
- Tidy, careful work
- Full insurance on every job
- Colour picked to suit the job
- Rated 4.9 stars on Google
How it works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Somewhere as small as Daw's End, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
How to prepare
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll take it from there.
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Places near Daw's End
Other services in Daw's End
Common problems we fix in Daw's End
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
Common reasons people contact us are:
- Failed seals between different materials
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
If you live in an older home near Church of St George, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- The length of the guarantee
- Whether VAT is included
- What happens if they find a problem under the old sealant
- Who turns up on the day
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Cracked brickwork or render that needs a builder or plasterer
- Movement that’s more than a sealant joint can take
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
Surfaces we seal
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
Landlord and commercial work in Daw's End
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.