Hampshire · England
Lower Common External Mastic
Professional external mastic in and around Lower Common, with every bit of old sealant taken out first.
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
- Panel joints letting water in
Surface by surface
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
External mastic in Lower Common
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement. Common call-outs are for weathered mastic that no longer stretches and leaking joints around cladding and façade panels, on copings & trims, concrete & block and brickwork movement joints.
External sealant needs dry, clean surfaces, so work around Lower Common is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
All our work is covered by a one-year guarantee, wherever you are in Hampshire.
- Where
- Lower Common (RG27)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
What we’re called out for in Lower Common
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Common reasons people contact us are:
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
Managing a site like Charles Kingsley's Church of England Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Whether you can choose the colour
- Is the old sealant removed completely?
- Who does the work, and how experienced they are
- What insurance they hold
Looking after it afterwards
Aftercare is simple:
- Look over the joints every year, ideally after winter
- Wash walls gently around the sealant
- Keep water from gutters off the wall
- Keep movement joints as flexible joints, not mortar
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
Landlords, agents and businesses in Lower Common
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
We also work for property managers and facilities teams. Several sites can go on one quote.
Places near Lower Common
More services for Lower Common
External mastic in Lower Common: local notes
Historic houses like Stratfield Saye House (about 4.3 miles west) are a reminder that the area around Lower Common has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Crowthorne station? Then split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Lower Common is about 3 miles west of Yateley, in Hampshire. Jobs in Lower Common get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Lower Common is one of 683 places in Hampshire we cover. Our Reading page covers work nearby (7 miles or so).
Work in RG27 works the same way as everywhere else we cover. Local streets include Mud Lane, Lower Common and Warbrook Lane, all of which we cover. If you’re just outside Lower Common, we cover Eversley (1 mile north-east), Eversley Centre (1 mile east), Eversley Cross (2 miles east), Finchampstead (2 miles east) and California (2 miles north-east). We also work in nearby towns such as Basingstoke (11 miles south-west), Farnborough (7 miles south-east), Fleet (6 miles south-east), Aldershot (9 miles south-east), Alton (14 miles south) and Yateley (3 miles east).
Landmarks near Lower Common
We work in homes and buildings around Bohunt School Wokingham, White Hart Public House and Shepperlands Farm Nature Reserve. Lower Common’s nearest station is Crowthorne station, about 3.5 miles east. Other landmarks nearby include West Green House Agricultural Museum (3.9 miles south) and Beaumys Castle (4 miles north-west). Green spaces nearby include The Marshes Local Nature Reserve and Horseshoe Lake.
Your questions about external mastic in Lower Common
Will you come out to Lower Common?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Crowthorne station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How much does external mastic cost in Lower Common?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Is there a guarantee?
Yes. Every job comes with our one-year guarantee.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Can you reach joints on upper floors?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
The process
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. Somewhere like Lower Common needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Read more
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. In a small place like Lower Common, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Lower Common
- 20+ years of sealant experience
- White, clear, grey or another colour, product permitting
- Arbo and Everbuild products
- Approved under the ARBOMaster scheme
Read what affects the cost or our reviews.