Hampshire · England
External Mastic in Firgo
Sealing brickwork movement joints, render, cladding and façade joints in Firgo, with a 12-month guarantee on every job. Ask us for a quote.
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
Common questions in Firgo
Do you work for landlords with property near Whitchurch (Hampshire) station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover Firgo for external mastic?
Yes. Our work covers London and the South East, and Firgo is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is there a guarantee?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides with primer where required.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
About our external mastic in Firgo
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 doesn’t stand out. If you are dealing with water getting into walls through failed joints and sealant that has lost its bond to the brick or render, we can put it right, on concrete & block, joints between brick and frames and copings & trims alike.
External sealant needs dry, clean surfaces, so work around Firgo is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Whatever the size of the job, it’s backed by our one-year guarantee in Firgo and across Hampshire.
- Place
- Firgo (RG28)
- Region
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
External mastic in Firgo: local notes
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.
Managing a site like Testbourne Community School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Whitchurch (Hampshire) station? Then split movement joints are easy to miss on a rental until damp shows inside.
Firgo is about 6 miles east of Andover, in Hampshire. If you need external mastic in Firgo, please phone 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Hampshire, Firgo included. Our Hampshire coverage runs to 683 places, Firgo among them. You can also see our page for Southampton, about 20 miles away.
All of RG28 is within our area for external mastic, from the main roads to the quietest streets. Close by, we work in Hurstbourne Priors (2 miles north-west), Whitchurch (2 miles north), Wells-in-the-Field (2 miles north-east), Freefolk (3 miles north-east) and Cole Henley (4 miles north). We also work in nearby towns such as Basingstoke (11 miles north-east), Winchester (10 miles south), Andover (6 miles west), Chandler's Ford (15 miles south), Tadley (13 miles north-east) and Hyde (9 miles south).
What’s near Firgo
For rail, the closest station is Whitchurch (Hampshire) station, about 2.4 miles north of the centre.
When it is not the sealant
In fairness, some problems need a different trade:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Render & cladding joints
- Façade panels
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
Why deal with it now?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way. Where a wall is exposed, as many are in small places like Firgo, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Doing several joints on one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Firgo
- Experience in homes, commercial sites and hotels
- Colour picked to suit the job
- Anti-fungal silicone where joints get wet
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced and our reviews.
Surface by surface
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Nearby places to Firgo
More services for Firgo
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents and landlords in Firgo can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
The process
You do not need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of joints, longer for a whole elevation in most cases. Somewhere as small as Firgo, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
- Clear items away from the joints we’re working on
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Related advice
What we’re called out for in Firgo
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
- Plants rooting in failed movement joints
If you live in an older home near Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- What happens if they find a problem under the old sealant
- Which sealant they’ll use, and why
- Whether they’re fully insured
- What preparation is included