West Berkshire · England
Longlane Window Mastic
Window mastic across Longlane and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
Frames and glazing around Longlane
Historic houses like Shaw House (about 2.7 miles south-west) are a reminder that the area around Longlane has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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.
Schools such as Curridge Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Newbury Racecourse station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Longlane is about 3 miles north of Thatcham, in West Berkshire. Every kind of property in Longlane is covered for window mastic. The work is guaranteed for a year. Longlane is one of 155 places in West Berkshire where we work for window mastic. Reading is on our list too, around 13 miles away.
We cover every part of RG18 for window mastic and the streets around it. Whether your property is on Sandy Close, Long Lane and Curridge Piece or anywhere close by, we can help. Other places close to Longlane include Curridge (1 mile west), Hermitage (1 mile north-east), Wellhouse (1 mile east), Oare (1 mile north) and Little Hungerford (1 mile north-east). Further out, we also cover Newbury (4 miles south-west), Thatcham (3 miles south), Burghfield Common (10 miles east), Speenhamland (3 miles south-west), Hungerford (10 miles west) and Spencers Wood (14 miles east).
Around Longlane
Typical jobs here are in homes near The Bunk Inn, among other places. The nearest railway station is Newbury Racecourse station, about 3.3 miles south. Nearby you will also find West Berkshire Community Hospital (2.7 miles south) and British Balloon Museum & Library Ltd (3.4 miles south-west). Green spaces nearby include Snelsmore Common.
How we handle window mastic in Longlane
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We work on window sills, patio & French doors and timber windows & doors, and people most often call us about old mastic that has gone black or come away and draughty joints inside around the window.
Homes in small places like Longlane often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Every job is covered by our one-year guarantee.
- Place
- Longlane (RG18)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What else we do in Longlane
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Your questions about window mastic in Longlane
Can you do window mastic in Longlane?
Yes, Longlane is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
I let a flat near Newbury Racecourse station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Can you do upstairs windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
How much does window mastic cost in Longlane?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
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.
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- Whether the work is at height
- Any mould that needs treating
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
What we need to know
Photos help, but a description is a good start. Please mention:
- How many joints, rooms or windows are involved
- The type of property
- Any previous sealing or DIY work
- The address or postcode of the job
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 add photos by email if you can.
Why act early in Longlane
If you’re painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Where a wall is exposed, as many are in small places like Longlane, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts.
Why book with us
- Anti-fungal silicone where joints get wet
- Homes, businesses and hotels
- Colour agreed with you before work begins
- A 12-month guarantee on all work
Read our cost guide and what customers say.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
Housing providers, facilities teams and property managers book us too in Longlane and across West Berkshire. We can quote a run of properties together.
When to call us in Longlane
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
Common reasons people contact us include:
- Cracked sealant at the sill ends
- Hard, cracked sealant around windows
- Gaps left after new windows were fitted
- Cracked internal joints between frame and plaster
Homes close to Holy Trinity include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
Before you book anyone
- How long the guarantee is
- Is VAT in the price?
- Which sealant they’ll use, and why
- How hidden problems are handled
How it works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a few frames, or a day or more for a whole house. In a small place like Longlane, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Tell us if parking is tricky
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Read more
What the job involves on each surface
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.