Wokingham · England
Sand mastic for sash & case windows in Whistley Green, Wokingham
Window and door surrounds in Whistley Green need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Old cement repairs round a window that have failed
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
Sand mastic for homes and businesses in Whistley Green
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you have gaps between timber frames and stone or brick and crumbling sand mastic round a window, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Whistley Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Whistley Green (RG10)
- Region
- Wokingham
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Whistley Green
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
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.
What sand mastic looks like in Whistley Green
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 St Nicholas Church of England Primary are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Twyford station, any sash windows need sound mastic to keep draughts and rain out.
Whistley Green is about 2 miles east of Woodley, in Wokingham. Whether you’re in the middle of Whistley Green or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Wokingham, we cover 35 places, and Whistley Green is one of them.
We cover every part of RG10 for sand mastic. If you need sand mastic at a property on Lodge Road, Broadwater Lane and Nursery Gardens or a nearby road, we can help. Nearby, we also carry out sand mastic in Hurst (1 mile south-east), Twyford (1 mile north), Ruscombe (1 mile north), Charvil (1 mile north-west) and Woodley (2 miles west). We also work in nearby towns such as Reading (5 miles west), Wokingham (4 miles south), Earley (4 miles south-west), Crowthorne (7 miles south-east), Lower Earley (3 miles south-west) and Newtown (4 miles west).
What’s near Whistley Green
Locally, jobs take us to homes and businesses close to Loddon Nature Reserve, Waingels College and Elephant and Castle pub and the streets around them. For rail, the closest station is Twyford station, roughly 1 mile north. Other landmarks nearby include Berkshire Library & Museum of Freemasonry (2.9 miles south-west) and Wokingham Hospital (3.5 miles south). The countryside around Whistley Green includes Lavells Lake and Sonning Hill.
Whistley Green: your questions answered
Do you work for landlords with property near Twyford station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Do you cover Whistley Green for sand mastic?
Yes, Whistley Green is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear quote.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
How long does sand mastic take?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We will tell you when we quote.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Which is right for my windows, sand mastic or modern sealant?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames generally get a flexible sealant.
What else we do in Whistley Green
What happens on the day
Once we’re 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 single window, longer for several. In a small place like Whistley Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
- Mention if the joints have been sealed before
Getting a quote
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
Advice
When it isn’t the sealant
It helps to know what we cannot do:
- Planning or listed building consent (your local planning authority decides)
- Cracked or broken glass
- Damaged stone surrounds
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Surfaces we seal
- Stone surrounds
- Tenement windows
- Timber door frames
- Sash and case windows
- Period & listed homes
- Brick reveals
Keeping the joints in good condition
So the new joints stay in good condition:
- Plan mastic work ahead of painting
- Go gently near the mastic when preparing windows
- Leave the new mastic unpainted
- Check the mastic when you check the paintwork
Don’t run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
What the job involves on each surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
What affects the quote in Whistley Green
Jobs vary more than people expect. What affects the quote:
- Working hours on commercial sites
- The number of rooms or windows
- Any mould that needs treating
- The old material and how stubborn it is
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
What we need to know
When you call or email, these details help:
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- The type of property
- How many joints, rooms or windows are involved
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, ring 0345 464 0079 or send us an email.