Buckinghamshire · England
Woodrow External Mastic
Professional external mastic in and around Woodrow, with every bit of old sealant taken out first and a 12-month guarantee.
- Rigid filler in a joint that should flex
- Cracked joints where brick meets render or frames
- Rain getting behind render or cladding at a joint
External mastic in Woodrow, done properly
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. We work on joints between brick and frames, façade panels and brickwork movement joints, and people most often call us about hard, crazed mastic that has stopped moving and plants rooting in failed movement joints.
Somewhere as small as Woodrow, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, you get the same 12-month guarantee in Woodrow and across Buckinghamshire.
- Location
- Woodrow (HP7)
- Wider area
- Buckinghamshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Woodrow
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
For anyone letting property in or around Woodrow, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Nearby places to Woodrow
Other services in Woodrow
Quotes for external mastic in Woodrow
Every job gets its own quote. This is what makes a difference:
- How many areas need sealing
- The size of the job
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
What we need to know
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- Where the property is
- The problem you’ve noticed
- Pictures of the joints, sent by email
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Never let anyone fill a movement joint with mortar
- Tell anyone working on the walls about the movement joints
- Keep water from gutters off the wall
- Ask before painting over external sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint cannot move, the wall finds another way, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Different surfaces, different methods
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. The sealant is chosen with that in mind.
What happens on the day
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. In a small place like Woodrow, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Read more
Walls and rooflines in Woodrow
With historic houses such as Hughenden Manor (about 4.6 miles west) nearby, there’s older building stock in the area around Woodrow as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Letting a property close to Amersham station? Then split movement joints are easy to miss on a rental until damp shows inside. Schools such as Curzon Church of England Combined School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Woodrow is about 2 miles south-west of Amersham, in Buckinghamshire. Every kind of property in Woodrow is covered for external mastic. Every job comes with our 12-month guarantee. Our Buckinghamshire coverage runs to 263 places, and Woodrow is one of them. You can also see our page for Reading, roughly 20 miles from Woodrow.
All of HP7 is within our area for external mastic. Other places close to Woodrow include Penn Street (1 mile west), Mop End (1 mile north-west), Winchmore Hill (1 mile south), Coleshill (1 mile south-east) and Beamond End (1 mile west). We also work in nearby towns such as Aylesbury (13 miles north-west), High Wycombe (5 miles south-west), Chesham (4 miles north-east), Marlow (8 miles south-west), Beaconsfield (3 miles south) and Chalfont St Peter (5 miles south-east).
Local landmarks in Woodrow
Around Woodrow, our work takes us to homes and buildings near Amersham Hall, Holmer Green Senior School and Queen's Head Public House, among other places. For rail, the closest station is Amersham station, about 2.1 miles north-east of the centre. A little further out are Amersham Fair Organ Museum (2.7 miles north-east) and Amersham Hospital (1.3 miles east). Open spaces near Woodrow include Gomm's Wood.
Do you need external mastic in Woodrow?
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
These are the problems we are asked about most:
- Gaps where render, brick and frames meet
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
- Moss and dirt in joints with no sealant left
Homes close to Church of the Holy Trinity include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- Whether all the old sealant comes out first
- What the cure time is
- The length of the guarantee
- What happens if the job turns out different
Your questions about external mastic in Woodrow
Do you work for landlords with property near Amersham station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Is Woodrow within the area you cover?
Yes. Woodrow is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we are done.
Can new sealant go over the old?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.