West Berkshire · England
Window Mastic in Great Shefford
Window mastic in Great Shefford from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps between the frame and the inside reveal
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
Window mastic in Great Shefford
From a single sill to a whole house of windows, you will get a clear quote before work begins. Just phone 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached for window mastic in Great Shefford. Common call-outs are for draughty joints inside around the window and rain getting in at the frame or under the sill, on composite doors, window sills and uPVC windows.
Around Great Shefford, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Place
- Great Shefford (RG17)
- Region
- West Berkshire
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need window mastic in Great Shefford
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
It’s worth asking for a quote if you see:
- Leaking joints at the ends of sills
- Draughts coming in around windows and doors
- Mastic that has split away from the wall
- Mastic that’s falling out in pieces
In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before you book anyone
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Whether they’re fully insured
- Whether they seal over old material or remove it
What sealant work can’t fix
New sealant can’t fix everything, and we’ll tell you before we start. It won’t solve:
- Condensation trapped between the panes
- Rotten timber, which needs a joiner first
- A door that needs adjusting, rehanging or new seals
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Great Shefford
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
- Timber windows & doors
- Patio & French doors
Why act early in Great Shefford
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. In a small place like Great Shefford, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why book with us
- Any old sealant cut out fully, not covered over
- Colour agreed with you before any work starts
- Sanitary silicone with an anti-fungal additive in wet areas
- Approved under the ARBOMaster scheme
Read our cost guide or our reviews.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Keep timber frames painted
- Avoid blasting the frames with a pressure washer
- Don’t paint over the silicone
- Wash the frames with mild soapy water
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Towns and villages near Great Shefford
What else we do in Great Shefford
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes anything from an hour or two to a full day, depending on how many frames there are, and the area is left clean. In a small place like Great Shefford, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
Ask for a quote
Need a quote? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
FAQs for Great Shefford
Is Great Shefford in your area for window mastic?
Yes, Great Shefford is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear quote.
Will you come out to Great Shefford?
Yes. Great Shefford is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Does the work come with a guarantee?
Yes. Every job comes with our 12-month guarantee, and we are ARBOMaster approved applicators.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we will say so.
How do I get a quote for window mastic in Great Shefford?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
Great Shefford homes and the weather
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.
If you look after a building such as Shefford C.E. Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Great Shefford is about 8 miles north-west of Newbury, in West Berkshire. Wherever you are in the RG17 postcode area, we can carry out window mastic at your property. Great Shefford is one of 155 places in West Berkshire where we work for window mastic. There’s also a page for Reading, roughly 20 miles from Great Shefford.
Jobs for window mastic in RG17 is quoted and booked the same way as anywhere else. Window mastic is available to properties on Station Road, The Mead and Miller's Field and the roads around them. We also cover the places around Great Shefford: East Shefford (1 mile south-east), Weston (1 mile south-east), East Garston (2 miles north-west), Shefford Woodlands (2 miles south-west) and East Garston Woodlands (2 miles west). Within a short drive, we also cover Newbury (8 miles south-east), Thatcham (10 miles south-east), Speenhamland (7 miles south-east), Hungerford (5 miles south-west), Lambourn (4 miles north-west) and Shaw (7 miles south-east).
Landmarks near Great Shefford
For a walk, there’s Sole Common Pond.