West Berkshire · England
Glazing & conservatory sealant in Colthrop, West Berkshire
Problem with your glazing joints in Colthrop? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Mouldy sealant around glass panels
- Split or lifting silicone on glass
- Leaking glazing joints on a rooflight
Glazing silicone for homes and businesses in Colthrop
We renew glazing silicone on conservatories, rooflights and glass panels, as well as frameless shower screens and glass balustrade bases. The old sealant comes out, the joint is cleaned and new silicone goes in. Typical jobs include new silicone smeared over old sealant and leaks from the base of a shower screen, across glass balustrade bases, rooflights and shower screens.
Homes in small places like Colthrop often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Colthrop (RG19, RG18)
- Region
- West Berkshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Colthrop
With historic houses such as Shaw House (about 3.5 miles west) nearby, there’s older building stock in the area around Colthrop as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near St Mary's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Francis Baily Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Colthrop is about 1 mile east of Thatcham, in West Berkshire. Colthrop gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Colthrop is one of 155 towns and villages in West Berkshire we cover for glazing silicone. Our Reading page covers work nearby, about 12 miles away.
Every address in RG19 and RG18 is covered for glazing silicone. If you need glazing silicone at a property on Bath Road, Ashman Road and Fokerham Road or a nearby road, our applicators can take on the job. If you are just outside Colthrop, we cover Crookham (2 miles south-east), Hyde End (2 miles south-east), Heads Hill (2 miles south-west), Mill Green (2 miles south) and Goose Hill (3 miles south). Further out, we also cover Newbury (4 miles west), Burghfield Common (8 miles east), Speenhamland (4 miles west), Hungerford (12 miles west), Spencers Wood (12 miles east) and Calcot (9 miles east).
Landmarks near Colthrop
Typical jobs here are in homes near The Swan pub and Kennet School. Colthrop’s nearest station is Thatcham station, about 0.5 miles south-west of the centre. A little further out are Old Chapel Textile Centre (2.6 miles south-west) and Donnington Castle (4.6 miles west). Green spaces nearby include Thatcham Reed Beds.
Colthrop questions
Can you help a landlord with a rental near Thatcham station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Colthrop in your area for glazing silicone?
Yes, Colthrop is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Colthrop.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
Do you replace glass?
No. Misting between panes means the sealed unit has failed, and a glazier needs to replace it.
Is balustrade sealant something you do?
We can, if the base joint is sealed. Photos help us see what’s there when you call 0345 464 0079 or email us.
Is a special sealant needed for glass?
A glazing-grade silicone is best. We use neutral-cure glazing silicone with anti-fungal products in bathrooms.
Can I do it myself?
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 sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
What we are called out for in Colthrop
Dirt and grease stop silicone sticking. Where the joint wasn’t cleaned and degreased, the bead can peel away early.
The most common problems we see are:
- Cracked silicone between glass panels
- Water running down inside the glass
- New silicone smeared over old sealant
- Failed sealant around rooflight glass
Rented homes near Thatcham station change hands often, and glazing joints are worth checking at the end of a tenancy, before a small leak grows.
What to look for in a quote
- Whether VAT is included
- How the joint is cleaned and prepared
- Whether you can choose the colour
- What insurance they hold
Surface by surface
Glass balustrade bases
We reseal the joint where the glass meets the base channel. We don’t install or replace glass.
Conservatory frames
Conservatory frame joints are a common source of leaks. We remove the failed sealant and renew it.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Clear the conservatory gutters regularly
- Check the silicone on glass every year or so
- Act on drips or damp patches early
- Run a squeegee over the glass when you are done
Don’t use blades or scrapers near the bead when cleaning the glass. A soft cloth or sponge is best.
A leaking shower screen may not show at first. Water can soak into the floor or reach the room below before you spot it.
Also near Colthrop
More services for Colthrop
How we quote for glazing silicone
For a quick quote, just ask. What matters most is:
- How easy the joints are to reach
- When we can work, for business premises
- The number and length of the joints
- The number of rooms or windows
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Photos by email, if that’s easy
- The type of property
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
What we do, step by step
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from an hour or two to most of a day, depending on the size of the job. For a village or hamlet like Colthrop, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we check where the water gets in.
- We remove the old sealant carefully.
- The joint is cleaned and degreased.
- A neutral-cure glazing silicone is applied and tooled.
- Each joint is checked and, where possible, water-tested.
How to prepare
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
How to get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.