Reading · England
New-build mastic & snagging in Sonning, Reading
Our applicators work in Sonning on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Internal frame sealant that has split
- Second-fix sealing on new plots
- Untidy sealant flagged on a snagging list
How we handle new build mastic in Sonning
Snagging sealant properly means taking the failed bead out completely. New silicone won’t bond to old silicone, so the joint is cut out, cleaned, dried and resealed. Typical jobs include beads laid onto grit and dust from the build and second-fix sealing on new plots, on skirting & floors, show homes and plot handovers.
For a small place like Sonning, the journey and access are planned in advance, and the work itself is the same as on any site.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Location
- Sonning (RG4)
- Wider area
- Reading
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Sonning
Can you help a landlord with a rental near Twyford station?
Yes. We work for landlords and letting agents as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Sonning?
Yes. Sonning 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.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, large or small.
Should I wait before resealing?
It depends on whether water is getting through. Failed seals in wet areas need doing now, but cosmetic gaps can wait for movement to slow.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you match the sealant colour to my new kitchen or bathroom?
It depends on the joint: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We will agree it with you first.
What happens on the day
On the day, we look over the joints with you first. Surfaces next to the work are protected before we start. The work normally takes a few hours in a single home. Somewhere like Sonning needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
How to get a quote
If you’re in Sonning and need new build mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around Sonning, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
What the job involves on each surface
Plot handovers
Taking time over preparation reduces return visits. We clean out building dust before sealing and primer used where needed.
Kitchens
As a new house dries, worktops and walls shift a little, opening gaps behind the upstand. We reseal them with a flexible sealant.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Act quickly if a seal starts to leak
- Do not seal over failed sealant yourself
- Open a window or run the fan after bathing
- Photograph failed sealant before it’s redone
Photograph failed sealant before it’s redone and keep the builder’s replies. It helps if anything else comes up during the warranty period.
Report failed sealant to the builder while you’re in the snagging period. After that, putting it right may fall to you, so raise it early.
Also near Sonning
Other services in Sonning
Common problems we fix in Sonning
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
These are the problems we are asked about most:
- Shower seals failing in the first year or two
- Internal frame sealant that has split
- Gaps behind new kitchen upstands
- Skirting joints opening in the first winter
In and around Sonning, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Which colour the sealant will be
- How the surfaces are prepared before sealing
- Are they insured?
- What happens if they find a problem under the old sealant
When something else is needed
New sealant cannot fix everything, and we will tell you before work begins. It will not solve:
- Plumbing faults behind the sealant
- Settlement cracks that need a surveyor
- Cracked trays, tiles or worktops
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Bathrooms & en suites
- Kitchens
- Plot handovers
- Windows & doors
- Show homes
- Skirting & floors
Why it’s worth doing now in Sonning
Small cosmetic gaps can wait for the house to settle, but water getting through cannot. If you’re unsure which you have, call 0345 464 0079 or send us an email with pictures and we’ll tell you. Around Sonning, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is generally more efficient than separate visits. We will give you a clear price for the lot.
Why choose Mr Mastic in Sonning
- ARBOMaster approved applicator
- Every job guaranteed for a year
- We leave the area clean and tidy
- Colour picked to suit the job
New homes and floors in Sonning
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Twyford station, the sealant around baths, showers and frames is worth checking in the first year or two.
Sonning is about 1 mile north-west of Woodley, in Reading. Anywhere in RG4, our applicators can take on new build mastic. Across Reading, we cover 34 places, Sonning among them.
Jobs for new build mastic in RG4 works the same way as everywhere else we cover. If you need new build mastic at a property on High Street, Parkway Drive and Pound Lane or a nearby road, we can help. You will find Sonning on the B478 and B4446, so it’s easy for us to get to with everything needed for new build mastic. If you’re just outside Sonning, we cover Play Hatch (1 mile north-west), Dunsden Green (2 miles north-west), Newtown (2 miles south-west), Caversham Park Village (2 miles north-west) and Littlestead Green (2 miles north-west). Larger places within reach include Caversham (3 miles west), Norcot (5 miles west), West Reading (4 miles west), Tilehurst Within (5 miles west), Shinfield (5 miles south-west) and Arborfield Garrison (6 miles south).
Near you in Sonning
In Sonning, that means homes and buildings near Ali's Pond Local Nature Reserve, Bull Inn and Waingels College, among other places. Sonning’s nearest station is Twyford station, about 1.9 miles east of the centre. A little further out are Berkshire Medical Heritage Centre Museum (2.5 miles south-west) and Royal Berkshire Hospital (2.6 miles south-west). Open spaces near Sonning include Sonning Hill and South Lake.