Essex · England
Great Waltham New Build Mastic
Problem with your new-build sealant joints in Great Waltham? We cut out the old, prepare the joints and apply the right sealant.
- Skirting joints opening in the first winter
- Second-fix sealing on new plots
- Untidy sealant flagged on a snagging list
New build mastic in Great Waltham
Snagging sealant properly means taking the failed bead out completely. New silicone will not bond to old silicone, so it all comes out before we clean, dry and reseal. If you are dealing with internal frame sealant that has split and cracks appearing as a new home settles, we can put it right.
Somewhere as small as Great Waltham, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Great Waltham (CM3)
- Region
- Essex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for most snagging lists, longer for a run of plots. In a small place like Great Waltham, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We check every joint and leave you with the cure times.
How to prepare
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Asking for a quote is easy: let us know the job and the location. Photos by email help us understand the job.
Advice
Questions from Great Waltham
Do you cover smaller places like Great Waltham?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Great Waltham in your area for new build mastic?
Yes. We work across London and the South East, and Great Waltham is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Is it worth resealing while the house is still settling?
Where water is getting through, do not wait. Hairline cosmetic gaps can wait until the house has settled.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area.
Where are you based?
Mr Mastic is based in Crawley. We cover Great Waltham and the rest of Essex, along with the rest of our area.
Can tenants book the work?
Of course. Ask your landlord first, and we can send them the quote if that helps.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
What colour sealant will you use?
White and clear are the most common, but sealant comes in other colours too. We match the colour to the finish before we begin.
Looking after it afterwards
After the cure time, these simple habits help:
- Wait for the cure time before using a resealed shower
- Avoid scourers and strong chemicals on sealant
- Act quickly if a seal starts to leak
- Don’t seal over failed sealant yourself
Follow the cure time we give you before the area gets wet. Most silicones need around a day before water reaches them.
Report failed sealant to the builder while you are in the snagging period. After that, putting it right may fall to you.
How we quote for new build mastic
Every job gets its own quote. This is what makes a difference:
- Whether old sealant or filler has to be cut out
- The size of the job
- Any mould that needs treating
- Which sealant suits the joint
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Where the job is, and your postcode
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or email us and describe the job and send photos if you have them.
Do you need new build mastic in Great Waltham?
Baths and trays settle under load once the home is lived in. A bath sealed empty drops slightly when filled, straining the joint and can tear.
If you can see any of these, it’s time to have the joints looked at:
- Gaps opening as the house dries out and settles
- Untidy sealant flagged on a snagging list
- Plot mastic for developers ahead of handover
- Cracked sealant around new window and door frames
If you’ve bought a new home near Beaulieu Park station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before booking anyone
- What happens if the job turns out different
- Whether they seal over old material or remove it
- What insurance they hold
- How the joint is cleaned and prepared
Surface by surface
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Plot handovers
Send us the schedule and any sealant specification. Sealant work across the plot is covered as agreed.
New build mastic in Great Waltham: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Great Waltham, as everywhere, new build mastic is only as good as the preparation behind it.
Great Waltham is about 4 miles north of Chelmsford, in Essex. Great Waltham gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Great Waltham is one of 644 towns and villages in Essex where we work.
Jobs for new build mastic in CM3 works the same way as everywhere else we cover. If you need new build mastic at a property on Brook Mead, Cherry Garden Road and Chelmsford Road or a nearby road, we can help. We also cover Breeds (1 mile south-west), Minnow End (1 mile south-east), Little Waltham (1 mile south-east), Broomfield (2 miles south-east) and Chignall Smealy (2 miles south-west). Larger places within reach include Chelmsford (4 miles south), Basildon (15 miles south), Braintree (8 miles north-east), Harlow (15 miles west), Brentwood (13 miles south-west) and Maldon (11 miles south-east).
What’s near Great Waltham
Locally, jobs take us to homes and businesses close to The Beehive pub, among other places. For rail, the closest station is Beaulieu Park station, about 3.7 miles south-east. Other landmarks nearby include Broomfield Hospital (1.4 miles south). For a walk, there’s Little Waltham Meadows.
Why it’s worth doing now in Great Waltham
A quick bead over the top of the old sealant can look fine at first, but it cannot bond to what’s underneath. A lasting seal starts with removing the old one completely. Around Great Waltham, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why Great Waltham clients choose us
- An ARBOMaster approved applicator
- We never seal over old sealant
- Sealant colour chosen to suit
- We leave the area clean and tidy
See what affects the cost and what customers say.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
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 fails, we can still redo it.