West Berkshire · England
New-build mastic & snagging in Lambourn, West Berkshire
Plot mastic for developers and snagging failed sealant in new homes for Lambourn, backed by a one-year guarantee. Ask us for a quote.
- Plot mastic for developers ahead of handover
- Leaking shower tray seals in a new home
- Skirting joints opening in the first winter
Lambourn questions
Do you cover Lambourn for new build mastic?
Yes. Our work covers London and the South East, and Lambourn is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Will you come out to Lambourn?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can you reseal over the builder’s sealant?
No. We always remove the existing bead, then clean and prime the joint, before resealing.
How much does new build mastic cost in Lambourn?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or drop us an email and let us know what needs doing and where.
Why has my new-build shower seal failed already?
There are usually two causes: the house moving as it dries, and sealant that never bonded properly. Cutting it out and resealing properly fixes both.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
New build mastic in Lambourn
We carry out plot mastic and second-fix sealing for builders, and snagging reseals for new-home owners. In both, preparation makes the difference. If you have untidy sealant flagged on a snagging list and gaps opening as the house dries out and settles, we can put it right.
In smaller places like Lambourn, new homes tend to come as small developments or single plots. The sealant around baths, showers, frames and skirtings needs to be right from the start.
A 12-month guarantee comes as standard.
- Where
- Lambourn (RG17)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Lambourn
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Surface by surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. It’s resealed with an exterior sealant suited to the frame and wall.
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
What happens if it’s left?
DIY kits do not solve the main problems with new-build sealant: grit, unprimed surfaces and old layers underneath. Proper removal and preparation are what make it last. Around Lambourn, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Leaving a failed joint normally makes the job bigger, not smaller. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why Lambourn customers choose us
- Arbo and Everbuild products
- Neat joints and a tidy finish
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
See our cost guide or customer reviews.
New build mastic around Lambourn
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.
Around Lambourn, as everywhere, new build mastic is only as good as the preparation behind it. For jobs in and around Lambourn, choosing the right material for each joint is as important as a tidy finish.
Lambourn is about 7 miles south-west of Wantage, in West Berkshire. For new build mastic in and around Lambourn, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover West Berkshire, Lambourn included. Lambourn is one of 155 towns and villages in West Berkshire we cover for new build mastic. You can also see our page for Oxford, about 21 miles away.
Our applicators cover all of RG17 for new build mastic. That includes homes and businesses on High Street, Station Road and Chapel Lane and the roads around them. Close by, we work in Sheepdrove (1 mile north-east), Upper Lambourn (1 mile north-west), Westcot (6 miles north), Sparsholt (6 miles north) and Kingston Lisle (6 miles north). Larger places within reach include Newbury (12 miles south-east), Thatcham (14 miles south-east), Speenhamland (11 miles south-east), Hungerford (7 miles south), Shaw (12 miles south-east) and Wash Common (12 miles south-east). Lambourn is one of the larger places we cover in West Berkshire.
Local landmarks in Lambourn
Locally, jobs take us to homes and businesses close to The George pub. Green spaces nearby include Watts Bank and Rams Hill.
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take a few hours in a single home. For a job in Lambourn, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Before we arrive
- Let us know about parking restrictions
- Mention any tricky access
- Clear the area around the work
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work.
Related advice
Towns and villages near Lambourn
What else we do in Lambourn
What sealant work cannot fix
We won’t take on work that won’t last, so these are the limits:
- Damaged fittings that need replacing
- Cracking that points to a structural problem
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly.
Where we work in Lambourn
- Windows & doors
- Kitchens
- Show homes
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
How to look after the new joints
So the new joints stay in good condition:
- Open a window or run the fan after bathing
- Clean sealant with mild detergent, not abrasives
- Keep water off fresh sealant until it has cured
- Photograph failed sealant before it’s redone
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Catching it early keeps the fix to the sealant.