Buckinghamshire · England
Hundridge Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Hundridge. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic that has split away from the wall
- Old mastic that has gone black or come away
- Rushed sealant from a window installation
DIY versus a professional finish
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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How we handle window mastic in Hundridge
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We work on patio & French doors, uPVC windows and window sills, and common reasons people get in touch are gaps left after new windows were fitted and cracked internal joints between frame and plaster.
In a village or hamlet like Hundridge, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Whatever the size of the job, it’s backed by our one-year guarantee in Hundridge and across Buckinghamshire.
- Location
- Hundridge (HP16)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Composite doors
A composite door normally sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Window sills
Where a sill meets brick or render, the ends often crack first. A tight seal at each end keeps rain out of the wall.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Hundridge questions
Can you help a landlord with a rental near Great Missenden station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Will you come out to Hundridge?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we’re ARBOMaster approved applicators.
Where is Mr Mastic based?
We work from Crawley. We cover Hundridge and the rest of Buckinghamshire, along with the rest of our area.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Avoid blasting the frames with a pressure washer
- Walk round the house once a year and look at the joints
- Paint up to the joint, not over it
- Wipe condensation off the frames
Silicone cannot generally be painted, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
What happens on the day
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes most of a day for a typical house, less for a few frames, including the tidy-up. In a small place like Hundridge, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- 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.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
- Clear items away from the joints we are working on
Getting 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, and email pictures if that is easy.
Read more
When it isn’t the sealant
It helps to know what we can’t do too:
- Condensation trapped between the panes
- A sash or casement that won’t close properly
- Damp problems in the wall away from the window
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Composite doors
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Window sills
Frames and glazing around Hundridge
With historic houses such as Cholesbury Manor House (about 3.4 miles north) nearby, there’s older building stock in the area around Hundridge 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 is traditional sand mastic. London and the South East are among 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 such as Cholesbury Manor House, about 3.4 miles north, show how far back building around Hundridge goes. If you look after a building such as Hyde Heath Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Hundridge is about 2 miles west of Chesham, in Buckinghamshire. Hundridge gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across Buckinghamshire, we cover 263 places, Hundridge among them. Our Reading page covers work nearby, about 23 miles away.
Work in HP16 works the same way as everywhere else we cover. Close by, we work in Hyde End (1 mile west), South Heath (1 mile west), Chartridge (1 mile north), Ballinger Common (2 miles north-west) and Chesham (2 miles east). We also work in nearby towns such as Aylesbury (10 miles north-west), High Wycombe (7 miles south-west), Marlow (11 miles south-west), Amersham (3 miles south-east), Beaconsfield (7 miles south) and Chalfont St Peter (8 miles south-east).
Around Hundridge
In Hundridge, that means homes and buildings near The Plough pub and Chiltern Hills Academy and the streets around them. The closest station to Hundridge is Great Missenden station, roughly 2.5 miles west. Well-known places in the area include Chiltern Hospital (2.1 miles south-west) and Great Missenden (1.7 miles south-west). For a walk, there’s Sands Bank and Pavis Wood.
Also near Hundridge
What else we do in Hundridge
When to call us in Hundridge
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
Keep an eye out for any of the following:
- Cracked sealant at the sill ends
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
- Old mastic that has gone black or come away
Letting a property close to Great Missenden station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before booking anyone
- How much experience the applicator has
- Whether they seal over old material or remove it
- What insurance they hold
- How hidden problems are handled