Surrey · England
Westhumble New Build Mastic
Specialist new build mastic for Westhumble: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
- Joints pulling apart as timber shrinks
New build mastic in Westhumble, done properly
Some owners wait for the first year’s movement before having joints redone. That makes sense for small gaps that are just cosmetic, but a seal that is letting water through needs doing now. We work on windows & doors, bathrooms & en suites and skirting & floors, and people most often call us about sealant that never bonded to the surface and gaps behind new kitchen upstands.
Older homes in small places like Westhumble often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
Whatever the size of the job, it’s backed by our one-year guarantee in Westhumble and across Surrey.
- Where
- Westhumble (RH5)
- Region
- Surrey
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
The work is kept neat and contained to the area we are working on. Expect the work to take a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. In a small place like Westhumble, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
How to prepare
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
Get a quote
If you’re in Westhumble and need new build mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
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For landlords and businesses
Letting agents and landlords in Westhumble can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
Towns and villages near Westhumble
What else we do in Westhumble
What the job involves on each surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Clean sealant with mild detergent, not abrasives
- Do not seal over failed sealant yourself
- Look at the sealant regularly in the first couple of years
- Follow the cure time we give you
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in keeps the job straightforward.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Common questions in Westhumble
Will you come out to Westhumble?
Yes. Westhumble is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Westhumble for new build mastic?
Yes, Westhumble is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Do you work for letting agents?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common as timber and plaster dry out. Poor preparation at handover adds to it.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you when we finish.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you reseal over the builder’s sealant?
No. Fresh silicone doesn’t stick to the old layer, so it soon lifts and traps water. We cut the old bead out completely.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
When to call us in Westhumble
Once people move in, baths and trays take weight and bed down. If a bath wasn’t filled when it was sealed, the bead is stretched the first time it’s used and the sealant may split.
Look out for any of the following:
- New-build shower sealant that has already split
- Sealant applied over dusty or wet surfaces
- Untidy sealant flagged on a snagging list
- Worktop and upstand sealant coming away
For new homes near Box Hill & Westhumble station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- Are they insured?
- Whether the sealant suits the joint
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
New build mastic around Westhumble
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Westhumble, as everywhere, new build mastic is only as good as the preparation behind it.
Westhumble is about 2 miles north of Dorking, in Surrey. Westhumble gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Westhumble is one of 395 places in Surrey we cover. You can also see our page for Crawley, about 12 miles away.
All of RH5 is covered for new build mastic. We cover properties on Adlers Lane, Chapel Lane and Burney Road and the roads around them. Other places close to Westhumble include Pixham (1 mile south-east), Mickleham (1 mile north-east), Ranmore Common (2 miles south-west), Dorking (2 miles south) and Westcott (2 miles south-west). Larger places within reach include Guildford (10 miles west), Woking (11 miles north-west), Epsom (6 miles north-east), Horley (9 miles south-east), Redhill (7 miles east) and Ewell (8 miles north-east).
Local landmarks in Westhumble
Locally, jobs take us to homes and businesses close to Norbury Park, Stepping Stones pub and Pippbrook House, among other places. Westhumble has its own railway station: Box Hill & Westhumble station. Nearby you will also find Headley Court (3.6 miles north-east) and Betchworth Castle (1.9 miles south-east). For a walk, there’s Box Hill and Reigate Heath.
What affects the cost of new build mastic
The quote reflects the job in front of us. We look at:
- Which sealant suits the joint
- Any working-time requirements on site
- Whether there’s mould to deal with
- The size of the job
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will explain what it covers.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
- Where the job is, and your postcode
- The type of property
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we will come back to you with a quote.