Windsor and Maidenhead · England
Window & door mastic in Dedworth, Windsor and Maidenhead
Our applicators work in Dedworth on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
- White mastic on grey or black frames
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
About our window mastic in Dedworth
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty. If the draught is through the window seals instead, we’ll tell you. Common call-outs are for mastic that’s falling out in pieces and a bead that doesn’t match the frame, across timber windows & doors, aluminium frames and patio & French doors.
Many houses in smaller places like Dedworth have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows.
Your job is guaranteed for a year, as with all our work.
- Location
- Dedworth (SL4)
- Region
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Dedworth
With historic houses such as St Leonard's Hill (about 0.6 miles south) nearby, there’s older building stock in the area around Dedworth as well as newer homes. 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Homes close to All Saints Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Windsor & Eton Central station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Dedworth is about 1 mile west of Windsor, in Windsor and Maidenhead. Our applicators cover window mastic for householders, landlords and businesses in Dedworth and nearby, as part of our work across Windsor and Maidenhead. Dedworth is one of 57 towns and villages in Windsor and Maidenhead we cover. For nearby work, see our Reading page.
All of SL4 is covered for window mastic, from the main roads to the quietest streets. You will find streets such as Ash Lane, Wolf Lane and Roses Lane, and we cover them all. Close by, we work in Windsor (1 mile east), Oakley Green (1 mile west), Boveney (1 mile north), Clewer (1 mile north-east) and Water Oakley (1 mile north-west). Within a short drive, we also cover Maidenhead (5 miles north-west), Boyn Hill (5 miles north-west), North Ascot (5 miles south-west), Cookham (7 miles north-west), Furze Platt (6 miles north-west) and Broomhall (6 miles south). Being one of Windsor and Maidenhead’s larger places, Dedworth has homes, rented property and businesses of every kind.
What’s near Dedworth
Locally, jobs take us to homes and businesses close to Windsor Girls' School, Windsor Girls' School and The Greene Oak pub. For rail, the closest station is Windsor & Eton Central station, roughly 1.7 miles east. Well-known places in the area include Windsor Castle (1.9 miles east) and King Edward VII Hospital (1.5 miles east). Not far away are Bray Pit and Taplow Lake.
Work for landlords, hotels and businesses
If you manage several properties in or around Dedworth, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Honest limits
Before booking, it’s worth knowing the limits:
- Damp problems in the wall away from the window
- A frame that has rotted at the joint
- Broken hinges, locks or handles
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
What we do, step by step
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It usually takes a few hours for a handful of frames, longer for a whole house. For a job in Dedworth, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
Ask for a quote
For window mastic in Dedworth, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Related advice
FAQs for Dedworth
Do you cover smaller places like Dedworth?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Windsor & Eton Central station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee, and we are ARBOMaster approved applicators.
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.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we will say so.
What should I tell you?
Tell us what needs doing and where, with pictures by email if possible. If we need more, we will ask.
Can you seal the gap between the frame and the plaster indoors?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
Nearby places to Dedworth
More services for Dedworth
Common problems we fix in Dedworth
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
The problems people usually mention when they call are:
- Cold air getting in at the frame edge
- Draughty joints inside around the window
- Hard, cracked sealant around windows
- A bead that does not match the frame
Managing a site like Dedworth Green First School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- When the joint can take water or movement
- What insurance they hold
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Walk round the house once a year and look at the joints
- Do not use solvent cleaners on the joint
- Keep paint and stain on wooden frames in good order
- Paint up to the joint, not over it
Most silicone sealants won’t take paint, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
What affects the quote in Dedworth
Jobs vary more than people expect. What affects the quote:
- How many areas need sealing
- Whether the work is at height
- When we can work, for business premises
- Mould in or behind the old joints
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What to tell us for a quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- The problem you’ve noticed
- The type of property
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job.