Buckinghamshire · England
Sand Mastic in Radnage
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Radnage, with a one-year guarantee on every job. Call for a quick quote.
- Modern sealant on a period surround
- Mastic round period door frames that has failed
- Window mastic to renew ahead of painting
How we handle sand mastic in Radnage
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead, and we’ll talk through which suits your home. If you have cracked mastic round a front door frame and failed mastic on an exposed elevation, we can help.
Homes in small places like Radnage often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Radnage (HP14)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. In a small place like Radnage, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
What you get with us
- Domestic, commercial and hotel work
- Over 20 years’ experience
- One-year guarantee on every job
- 4.9 on Google from 180+ five-star reviews
Read our cost guide and what customers say.
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- Any working-time requirements on site
- The old material and how stubborn it is
- The number of rooms or windows
- The type of sealant required
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
To help us quote quickly, let us know:
- Whether it’s a home or a business
- Roughly how big the job is
- The address or postcode of the job
- Any access issues, like height or stairs
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Sand mastic in Radnage: local notes
With historic houses such as West Wycombe Park House (about 3.2 miles south-east) nearby, there’s older building stock in the area around Radnage as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Radnage Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Radnage is about 6 miles north-west of High Wycombe, in Buckinghamshire. For sand mastic in and around Radnage, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We cover Buckinghamshire from our Crawley base. We cover 263 towns and villages across Buckinghamshire, large and small. You can also see our page for Reading, about 16 miles away.
Postcode districts we cover here for sand mastic: HP14. You will find streets such as Bottom Road, Bower's Lane and Bennett End Road, all of which we cover. We also cover Bennett End (1 mile west), Bledlow Ridge (1 mile north-east), The City (1 mile south), Rout's Green (1 mile north) and Waterend (1 mile south-west). Within a short drive, we also cover Aylesbury (10 miles north), High Wycombe (6 miles south-east), Chesham (11 miles east), Marlow (8 miles south-east), Amersham (11 miles east) and Beaconsfield (10 miles south-east).
What’s near Radnage
We work in homes and buildings around The Three Horseshoes Inn, among other places. The closest station to Radnage is Saunderton station, roughly 1.6 miles east. Well-known places in the area include Wycombe Hospital (5.5 miles south-east). Not far away are Yoesden and Bald Hill.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. Somewhere like Radnage needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
Get a quote
For sand mastic in Radnage, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before we start.
Related advice
Nearby places to Radnage
What else we do in Radnage
Common questions in Radnage
Can you help a landlord with a rental near Saunderton station?
Yes. We work for landlords and letting agents as well as householders. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover smaller places like Radnage?
Yes. Radnage is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long will you be here?
A typical job takes anything from a few hours to a full day, depending on how many windows, including the preparation. We’ll confirm how long when we quote.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Where are you based?
We are based in Crawley, and we work across South East England, London and Scotland.
What does sand mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
What should I tell you?
A short description and the location. We will ask anything else we need to know.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Ask us before painting near the mastic
- Plan mastic work ahead of painting
- Clear gutters so water does not pour onto the windows
- Take care around the mastic when scraping paint
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
What we’re called out for in Radnage
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
People generally contact us when they notice one of these:
- Draughts and rain around sash boxes
- Gaps round a timber door in stone or brick
- Mastic dropping out of the joint
- Window mastic to renew ahead of painting
For landlords with property near Saunderton station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What to look for in a quote
- How long the guarantee is
- Who does the work, and how experienced they are
- What the quote includes, VAT included or not
- What happens if the job turns out different
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Masonry that needs repairing
- Putty and glazing repairs
- Decisions on consent for listed homes
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Tenement windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Stone surrounds
- Sash and case windows
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.