Hampshire · England
Rooksdown External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Rooksdown and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Joints with sealant missing in places
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
How we quote for external mastic
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- The product the joint needs
- Access and height
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
When you contact us, these details help:
- Where the job is, and your postcode
- Photos by email, if that’s easy
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
How we handle external mastic in Rooksdown
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. If you have cracked joints where brick meets render or frames and joints with sealant missing in places, we can put it right, on concrete & block, copings & trims and brickwork movement joints alike.
Homes around Rooksdown range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Rooksdown (RG24, RG23, RG26)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Rooksdown
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In an older home around Rooksdown, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why us?
- More than 20 years in sealant work
- Approved under the ARBOMaster scheme
- Sanitary silicone with an anti-fungal additive in wet areas
- Colour agreed with you before any work starts
Read what affects the cost and customer reviews.
When to call us in Rooksdown
Sometimes a movement joint was filled with mortar or a rigid filler. The joint can’t move, so the wall cracks somewhere else instead.
Look out for any of the following:
- Rigid filler in a joint that should flex
- Brick movement joints where the sealant has split
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
If you look after a building such as Fort Hill Community School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Whether they seal over old material or remove it
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
- Whether VAT is included
Towns and villages near Rooksdown
Also in Rooksdown
External mastic in Rooksdown: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as The Vyne (about 2.2 miles north-east) nearby, there’s older building stock in the area around Rooksdown 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 Vyne, about 2.2 miles north-east, is one of the historic houses in the wider area around Rooksdown. Letting a property close to Basingstoke station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Rooksdown is about 1 mile north-west of Basingstoke, in Hampshire. If you need external mastic in Rooksdown, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We’re based in Crawley and cover Hampshire. Rooksdown is one of 683 places in Hampshire where we work. For nearby work, see our Reading page.
Work in RG24, RG23 and RG26 is quoted and booked the same way as anywhere else. We cover properties on Mill Road, The Square and Hasket Road. We also cover Winklebury (1 mile south), Sherborne St John (1 mile north-east), Basingstoke (1 mile south-east), Worting (2 miles south-west) and Buckskin (2 miles south). Further out, we also cover Farnborough (15 miles east), Fleet (12 miles east), Alton (11 miles south-east), Yateley (13 miles east), Tadley (5 miles north) and Hook (7 miles east).
Landmarks near Rooksdown
Around Rooksdown, our work takes us to homes and buildings near Winklebury Infant School and the streets around them. For rail, the closest station is Basingstoke station, about 1.7 miles south-east of the centre. Nearby you will also find Willis Museum (1.9 miles south-east) and Park Prewett Hospital (under half a mile south). Open spaces near Rooksdown include Farleigh Hill and Daneshill Park Woods.
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Copings & trims
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Point out the joints to other trades
- Fix overflowing gutters above sealed joints
- Look over the joints every year, ideally after winter
- Don’t let climbing plants root in the sealant
Only paint over the joint if we’ve confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
The process
At the end, we look at the finished work together. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. Parking around Rooksdown is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- 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.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details.
Advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
FAQs for Rooksdown
Do you cover Rooksdown for external mastic?
Yes, Rooksdown is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Do you cover smaller places like Rooksdown?
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.
What does external mastic cost?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses, and we’re fully insured.
What information do you need?
A short description and the location, with pictures by email if possible. We will ask anything else we need to know.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.