Oxfordshire · England
Window Mastic in Streatley
Professional window mastic in and around Streatley, with old sealant always removed completely and a one-year guarantee.
- Draughty joints inside around the window
- Black, perished sealant on frames
- Gaps left after new windows were fitted
Window mastic in Streatley
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. We’re often asked to deal with draughts coming in around windows and doors and gaps where the sill meets the wall, across timber windows & doors, window sills and patio & French doors.
Mastic can only go onto a dry, clean joint, so window work in Streatley is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Big or small, you get the same one-year guarantee.
- Place
- Streatley (RG8)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Once we are 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 a few hours for a handful of frames, longer for a whole house. Somewhere as small as Streatley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Mention any sign-in or site rules at work premises
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
Get a quote
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.
Advice
Also near Streatley
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What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- A sash or casement that won’t close properly
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp coming through the wall itself rather than the frame joint
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Composite doors
- Window sills
- Timber windows & doors
- Patio & French doors
Why it’s worth doing now in Streatley
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Older cottages and farmhouses around Streatley can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit is usually more efficient than separate visits. We’ll send you a clear quote for the lot.
Why us?
- Old sealant always removed completely
- A choice of colours where the product allows
- You choose the colour before work begins
- Experience in homes, commercial sites and hotels
Read how sealant jobs are priced or our reviews.
How to look after the new joints
To keep the joints looking good and working properly:
- Repaint timber before it’s bare
- Use gentle cleaners on frames and sealant
- Keep solvents and bleach off the sealant
- Wipe condensation off the frames
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Common problems we fix in Streatley
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. That’s what backing rod is for.
Look out for any of the following:
- Untidy mastic left by window fitters
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
- Hard, cracked sealant around windows
Managing a site like Streatley C.E. Voluntary Controlled School? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it
- How the colour is chosen
Window mastic in Streatley: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Basildon Park (about 2.1 miles south-east) are a reminder that the area around Streatley has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you let a flat or house near Goring & Streatley station, renewing tired window mastic between tenants heads off draught and damp complaints.
Streatley is about 7 miles south-east of Didcot, in Oxfordshire. Our applicators cover window mastic for householders, landlords and businesses in Streatley. Streatley is one of 443 places in Oxfordshire we cover. Our Reading page covers work nearby (9 miles or so).
Work in RG8 works the same way as everywhere else we cover. Streets in the area include High Street, Streatley Hill and The Bull Meadow. We also cover the places around Streatley: Goring (1 mile east), Lower Basildon (2 miles south-east), South Stoke (2 miles north), Moulsford (2 miles north) and Elvendon (2 miles east). We also work in nearby towns such as Didcot (7 miles north-west), Abingdon-on-Thames (12 miles north-west), Wantage (13 miles west), Henley-on-Thames (11 miles east), Grove (13 miles north-west) and Benson (7 miles north).
Around Streatley
We work in homes and buildings around The Bull Hotel and the streets around them. Streatley’s nearest station is Goring & Streatley station, roughly 0.8 miles east of the centre. Other landmarks nearby include Yattendon Castle (4.5 miles south-west). The countryside around Streatley includes Withymead Nature Reserve and Churn Hill.
Different surfaces, different methods
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. Those corners get the most care.
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
Your questions about window mastic in Streatley
Is Streatley in your area for window mastic?
Yes. We work across London and the South East, and Streatley is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Do you cover smaller places like Streatley?
Yes, Streatley is covered. 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.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
How many windows can you do in a day?
A handful of frames is a short visit. You will get a timescale with the quote.
Is the new sealant paintable?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- The type of sealant required
- How easy the joints are to reach
- The number and length of the joints
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear quote before work begins.
Helping us quote
When you contact us, it’s useful to know:
- How we’d reach the joints
- Whether it has been sealed before
- The rough size of the job
- What the problem is, such as mould, gaps, leaks or cracking
For window mastic in Streatley, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.