Hampshire · England
External Mastic in Deadwater
Specialist external mastic for Deadwater: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Moss and dirt in joints with no sealant left
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
Outside joints around Deadwater
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.
If you look after a building such as Mill Chase Academy, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. For landlords with property near Liphook station, split movement joints are easy to miss on a rental until damp shows inside.
Deadwater is about 1 mile east of Bordon, in Hampshire. Across the GU35 area, we cover external mastic for homes and businesses. Across Hampshire, we cover 683 places, Deadwater among them. You can also see our page for Portsmouth, roughly 23 miles from Deadwater.
Postcode districts we cover here for external mastic: GU35. External mastic is available to properties on Alma Road, Varna Road and Rowan Road. We also cover Lindford (1 mile north-east), Bordon (1 mile west), Hollywater (1 mile south), Standford (1 mile south-east) and Pinewood Village (1 mile north-west). Larger places within reach include Basingstoke (15 miles north-west), Farnborough (13 miles north), Fleet (11 miles north), Aldershot (10 miles north-east), Alton (6 miles north-west) and Petersfield (8 miles south-west).
Around Deadwater
Typical jobs here are in homes near Weyford Nursery and Primary School, among other places. Deadwater’s nearest station is Liphook station, roughly 3.6 miles south-east. A little further out are Chase Community Hospital (0.7 miles south-west). Not far away are Deadwater Valley and Selborne Hill.
External mastic in Deadwater
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. Common call-outs are for rigid filler in a joint that should flex and sealant pulling away from one side of the joint, across façade panels, concrete & block and joints between brick and frames.
Around Deadwater, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks normally start at a gutter end, a garage door frame or where an extension meets the house.
A one-year guarantee comes as standard.
- Place
- Deadwater (GU35)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Deadwater
More services for Deadwater
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a job in Deadwater, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- 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.
Getting ready for the visit
- Move anything stored near the joints
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
We quote each job on its own. Just call 0345 464 0079 or email us with the details and send pictures if you have them.
Advice
Landlord and commercial work in Deadwater
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Common problems we fix in Deadwater
Sometimes a movement joint was filled with mortar or a rigid filler. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
If you can see any of these, it’s time to have the joints looked at:
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
Homes close to St Mark's Sacred Church include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- What the cure time is
- Who turns up on the day
- Whether VAT is included
- Are they insured?
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Keep water from gutters off the wall
- Show decorators and builders where the movement joints are
- Keep soil, plants and ivy away from the joints
- Get split or bare joints resealed while the damage is small
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
How the job changes by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.
FAQs for Deadwater
Do you work for landlords with property near Liphook station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover Deadwater for external mastic?
Yes, Deadwater is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
Can I add another job to the visit?
Of course. Doing several areas at once is normally more efficient.
How long does the job take?
It depends on the size of the job, but most jobs take anything from a few hours to several days, depending on the building. We will tell you when we quote.
How do I get a quote for external mastic in Deadwater?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
When is the sealant fully cured?
It depends on the product and the conditions. We tell you how long to leave it before we go.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
Quotes for external mastic in Deadwater
There’s no set price list. What we look at:
- Whether the work is at height
- How many rooms, windows or areas are involved
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Asking for a quote
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- Roughly how big the job is
- Whether it has been sealed before
- The address or postcode of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, ring 0345 464 0079 or email us.