Hertfordshire · England
Titmore Green External Mastic
External mastic across Titmore Green and nearby, with every bit of old sealant taken out first.
- Panel joints letting water in
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
How it works
Before we leave, we go over the finished joints with you. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. Somewhere like Titmore Green needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- For business premises, tell us about site rules or sign-in
Ask for a quote
If you’re in Titmore Green and need external mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
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External mastic for homes and businesses in Titmore Green
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where a rigid filler would soon crack. We work on joints between brick and frames, brickwork movement joints and façade panels, and common reasons people get in touch are water getting into walls through failed joints and joints pointed up with cement by mistake.
Outside joints can only be sealed when they’re dry, so work in Titmore Green is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Titmore Green (SG4)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Titmore Green: your questions answered
Can you do external mastic in Titmore Green?
Yes, Titmore Green is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear quote.
Do you cover smaller places like Titmore Green?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that normally means someone at home.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels, and we are fully insured.
Towns and villages near Titmore Green
Other services in Titmore Green
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Wash walls gently around the sealant
- Ask before painting over external sealant
- Fix overflowing gutters above sealed joints
- Look over the joints every year, ideally after winter
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
What we cannot put right
To be straight with you, some problems need a different trade:
- Loose or hollow render, which needs re-rendering
- Damp that isn’t coming from the joint
- Subsidence or other structural problems
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Titmore Green
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Walls and rooflines in Titmore Green
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Knebworth House (about 3.7 miles south) nearby, there’s older building stock in the area around Titmore Green as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
In the older streets around Church of St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move. If you look after a building such as Wymondley Junior Mixed and Infant School, its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Stevenage station? Then split movement joints are easy to miss on a rental until damp shows inside.
Titmore Green is about 2 miles south-east of Hitchin, in Hertfordshire. Homes, rented property, offices and hotels in Titmore Green is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Titmore Green is one of 381 places in Hertfordshire we cover. For nearby work, see our London page, about 30 miles away.
Every address in SG4 is covered for external mastic, from the main roads to the quietest streets. Other places close to Titmore Green include Lower Titmore Green (1 mile south-east), Todd's Green (1 mile east), Little Wymondley (1 mile north), Sperberry Hill (1 mile west) and St Ippolyts (1 mile west). Further out, we also cover Hemel Hempstead (15 miles south-west), Stevenage (3 miles south-east), St Albans (13 miles south), Welwyn Garden City (9 miles south), Harpenden (9 miles south-west) and Hoddesdon (15 miles south-east).
Local landmarks in Titmore Green
In Titmore Green, that means homes and buildings near The John Henry Newman School, Hermit of Redcoats pub and The John Henry Newman School. The nearest railway station is Stevenage station, about 2.1 miles south-east. Other landmarks nearby include Lister Hospital (1.1 miles east) and Stevenage Museum (2.3 miles south-east). For a walk, there’s Purwell Ninesprings.
Quotes for external mastic in Titmore Green
We quote each job individually. This is what makes a difference:
- The size of the job
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Whether there’s mould to deal with
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Asking for a quote
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- The type of property
- Where the job is, and your postcode
Want a quote for external mastic? Please call 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.