Windsor and Maidenhead · England
Gutter Sealing in Old Windsor
Gutter sealing for Old Windsor, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Garage door frames letting rain in
- Gaps along fascia and soffit joints
- Water dripping where gutter sections meet
Gutter sealing in Old Windsor, done properly
Across Old Windsor, we reseal gutter joints, end caps and roofline trims. Single-storey and low gutters are simple to reach and if it’s higher up, let us know and we’ll confirm what access is needed. We work on garage door frames, soffit joints and uPVC fascias, and the jobs we see most are leaking gutter joints and stop ends and wet patches on the wall under a gutter joint.
In a smaller place like Old Windsor, some homes face open ground, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are generally the first to go.
You get a one-year guarantee, the same in Old Windsor as everywhere else we work.
- Place
- Old Windsor (SL4)
- Wider area
- Windsor and Maidenhead
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Old Windsor
Do you cover smaller places like Old Windsor?
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.
I let a flat near Sunnymeads station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Will you clear out my gutters?
We clean the joints we’re sealing and any debris nearby is cleared. A full gutter clean is a separate service.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Where are you based?
Mr Mastic is based in Crawley. We cover Old Windsor and the rest of Windsor and Maidenhead.
Do you have insurance?
Yes. We are fully insured.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
What does gutter sealing cost?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us and let us know what needs doing and where.
Places near Old Windsor
More services for Old Windsor
Outside joints around Old Windsor
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. Historic houses like Frogmore House (about 1.3 miles north-west) are a reminder that the area around Old Windsor has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to St Luke include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Sunnymeads station change hands often, and a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside.
Old Windsor is about 2 miles north-west of Egham, in Windsor and Maidenhead. Every kind of property in Old Windsor can book us for gutter sealing. Every job comes with our one-year guarantee. Old Windsor is one of 57 places in Windsor and Maidenhead where we work for gutter sealing. You can also see our page for Reading, about 17 miles away.
Postcode districts we cover here for gutter sealing: SL4. If you need gutter sealing at a property on Church Road, Parker Gardens and Gregory Drive or anywhere close by, we can help. Old Windsor sits on or near the B3021, which makes travel easy. We also cover the places around Old Windsor: Wraysbury (1 mile east), Sunnymeads (1 mile north-east), Bishopsgate (1 mile south), Datchet (2 miles north) and Englefield Green (2 miles south). Further out, we also cover Maidenhead (8 miles north-west), Windsor (3 miles north-west), Boyn Hill (8 miles north-west), North Ascot (6 miles south-west), Cookham (9 miles north-west) and Furze Platt (9 miles north-west).
What’s near Old Windsor
In Old Windsor, that means homes and buildings near St John's Beaumont School, Windsor Great Park and The Fox And Castle Public House and the streets around them. For rail, the closest station is Sunnymeads station, about 1.3 miles north-east of the centre. Nearby you’ll also find Windsor Castle (2.1 miles north-west) and Berkshire Yeomanry Museum (1.6 miles north-west). For a walk, there’s St Ann's Hill and Virginia Water Lake.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What affects the cost of gutter sealing
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether old sealant or filler has to be cut out
- The type of sealant required
- Mould in or behind the old joints
- Whether the work is at height
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
What to tell us for a quote
You don’t need to know the technical terms. Just tell us:
- If someone has resealed it before
- The address or postcode of the job
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Signs you need gutter sealing in Old Windsor
When a gutter sags, its joints open. Resealing a sagging joint will not last, so the gutter needs refixing first.
People usually contact us when they notice one of these:
- Open joints in fascias and soffits
- Water running down the wall below the gutter
- Water dripping where gutter sections meet
- Stop ends leaking at the end of a run
For site and facilities teams at buildings such as King's Court First School, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- Whether they seal over old material or remove it
- How long to leave it before use
- Is VAT in the price?
- How much experience the applicator has
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Leave it or put it right?
You do not need to replace a garage door because rain gets in round the frame. Sealing the frame usually stops it, if the frame itself is sound. Around Old Windsor, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Leaving a failed joint normally makes the job bigger, not smaller. If you’re not sure whether it needs doing, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- We leave the area clean and tidy
- Anti-fungal silicone where joints get wet
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
What we do, step by step
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes an hour or two for a few joints, longer for a full run. A visit to Old Windsor is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at the gutters, fascias and trims and agree the joints to seal.
- We clean out each joint.
- The joints are dried.
- The sealant is applied and finished.
- The joints are checked once sealed.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or email us.
Related advice
Surface by surface
Roofline trims
Sealing roofline trims is joint work only. A roofer deals with the roof itself.
Soffit joints
Gaps at soffit joints can let in draughts and insects. We close them with a suitable sealant.