Surrey · England
External Mastic in Aaron's Hill
Specialist external mastic for Aaron's Hill: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
Different surfaces, different methods
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so neither cracks the other.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
External mastic for homes and businesses in Aaron's Hill
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. If you are dealing with moss and dirt in joints with no sealant left and movement joints with cracked, split or missing sealant, we can help.
Houses in smaller places like Aaron's Hill can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. That is where gutter joints and wall joints tend to fail first.
Our work is backed for twelve months, in Aaron's Hill and everywhere else we cover.
- Location
- Aaron's Hill (GU7)
- Region
- Surrey
- Cover
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Aaron's Hill
Historic houses like Loseley Park (about 2.5 miles north-east) are a reminder that the area around Aaron's Hill 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like St Mark and All Saints Church of England Primary? Then larger buildings have long runs of movement joint that eventually need resealing. In the older streets around St Mark's Church and Community Centre, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Aaron's Hill is about 1 mile west of Godalming, in Surrey. Across the GU7 area, we can carry out external mastic at your property. Our area takes in 395 places across Surrey, large and small. We also work in Crawley, about 20 miles from Aaron's Hill.
Jobs for external mastic in GU7 is quoted and booked the same way as anywhere else. Streets in the area include Mayen Road, Grove Road and Holly Lane, and we cover them all. You will find Aaron's Hill on the A3100, which makes it straightforward to reach with everything needed for external mastic. Other places close to Aaron's Hill include Upper Eashing (1 mile west), Godalming (1 mile east), Lower Eashing (1 mile west), Milford (1 mile south-west) and Tuesley (1 mile south). Within a short drive, we also cover Guildford (5 miles north-east), Woking (10 miles north), Camberley (11 miles north), Farnham (7 miles west), Dorking (13 miles east) and Frimley (10 miles north-west).
Local landmarks in Aaron's Hill
In Aaron's Hill, that means homes and buildings near St Hilary's School, Phillips Memorial Park and The Inn on the Lake, among other places. The nearest railway station is Godalming station, roughly 0.6 miles east. Other landmarks nearby include Godalming Museum (0.7 miles east) and Guildford Castle (4.3 miles north-east). Open spaces near Aaron's Hill include Frith Hill and Lower Lake.
Towns and villages near Aaron's Hill
More services for Aaron's Hill
What sealant work cannot fix
To be straight with you, some problems need a different trade:
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
- Render that’s blown, hollow or coming away
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
Leave it or put it right?
Sealing over the top of old mastic doesn’t hold for long. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Around Aaron's Hill, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and send you a clear quote before we start.
What you get with us
- Full insurance on every job
- Arbo and Everbuild products
- We agree the colour with you first
- We leave the area clean and tidy
Read what affects the cost and customer reviews.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
How it works
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours for a handful of joints, longer for a whole elevation. A visit to Aaron's Hill is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
Ask for a quote
Want a quote for external mastic? Please call 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Read more
Aaron's Hill questions
Is Aaron's Hill within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Aaron's Hill for external mastic?
Yes, Aaron's Hill is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including the preparation. We’ll confirm how long when we quote.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
How we quote for external mastic
The price is agreed before any work begins. It’s based on:
- When we can work, for business premises
- Access and height
- How much there is to do
- The product the joint needs
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- Photos by email, if that is easy
- Whether it’s a home or a business
- The rough size of the job
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand, and we will come back to you with a quote.
What we are called out for in Aaron's Hill
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
People usually contact us after spotting something like this:
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
- Weathered mastic that no longer stretches
Rented homes near Godalming station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- What preparation is included
- What guarantee comes with the work
- Are they insured?
- What happens if the job turns out different