Buckinghamshire · England

Grendon Underwood Floor Joint Sealing

Sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints for Grendon Underwood, backed by a 12-month guarantee. Call for a quick quote.

  • Floor edges that trap water and grime
  • Cracked caulk along skirting in bathrooms and kitchens
  • Tiled floors with no room to move

Trusted floor joint sealing in Grendon Underwood

Why act early in Grendon Underwood

Filling a skirting gap with caulk looks fine at first, but the movement soon cracks it. A flexible sealant moves with the floor and keeps the joint sealed. Where a wall is exposed, as many are in small places like Grendon Underwood, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.

What it costs depends on how much there is to do, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.

Why book with us

  • Anti-fungal silicone where joints get wet
  • Arbo and Everbuild products
  • A sealant colour to suit the surroundings
  • Full insurance on every job

See how sealant jobs are priced and customer reviews.

Floor joint sealing for homes and businesses in Grendon Underwood

Large tiled floors, and those over underfloor heating, often need movement joints. We can turn a line of grout into a movement joint by replacing it with flexible sealant coloured to suit the grout. We are often asked to deal with chipped and open joints in warehouse floors and failed seals where bathroom floors meet baths and panels, on concrete floor joints, thresholds and wet room & bathroom floors.

Older homes in small places like Grendon Underwood often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.

The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.

Eleven members of the Mr Mastic team standing in front of branded white vans
Where
Grendon Underwood (HP18)
Wider area
Buckinghamshire
Cover
A year, on every job
Price
Quoted before any work starts
Telephone
0345 464 0079
Page updated
26 October 2026

When to call us in Grendon Underwood

Grout is rigid, so a tiled floor with nowhere to move cracks along a grout line. You will see a crack running along the grout, where a flexible joint should have been.

Any of these means the joints need attention:

  • Open gaps along the bottom of skirting boards
  • Floor edges that trap water and grime
  • Gaps between floors and kitchen plinths
  • Cracked caulk along skirting in bathrooms and kitchens

Managing a site like Grendon Underwood Combined School? Then floor and threshold joints in busy corridors wear quickly and are best resealed early.

Questions to ask before you book

  • How the surfaces are prepared before sealing
  • What product goes in the joint
  • The length of the guarantee
  • What happens if the job turns out different

Choosing a sealant specialist

What affects the cost of floor joint sealing

We quote each job individually. These are the things that affect it:

  • Whether old sealant or filler has to be cut out
  • The number of rooms or windows
  • Whether there’s mould to deal with
  • The product the joint needs

Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.

Helping us quote

A few details help us give you an accurate quote. When you ask for a quote, tell us:

  • Pictures of the joints, sent by email
  • The problem you’ve noticed
  • Any access issues, like height or stairs
  • The type of property

For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.

Floor joint sealing in Grendon Underwood: local notes

Floors around Buckinghamshire run from suspended timber in older homes to concrete in newer houses and units, and they do not all move the same way. That is why the skirting and threshold joints need a flexible seal.

For buildings such as Church of St Leonard, joints in its floors, skirtings and thresholds need resealing as they wear.

Grendon Underwood is about 6 miles east of Bicester, in Buckinghamshire. We provide floor joint sealing to homeowners, landlords and businesses in Grendon Underwood. Grendon Underwood is one of 263 towns and villages in Buckinghamshire we cover. Oxford is on our list too, around 13 miles away.

Jobs for floor joint sealing in HP18 works the same way as everywhere else we cover. If you need floor joint sealing at a property on Main Street, The Firs and Darley's Close or a nearby road, we can help. Nearby, we also carry out floor joint sealing in Edgcott (1 mile north), Ludgershall (2 miles south-west), Piddington (3 miles south-west), Blackthorn (4 miles west) and Brill (5 miles south-west). Further out, we also cover Aylesbury (9 miles south-east), Buckingham (8 miles north), Elmhurst (9 miles south-east), Southcourt (10 miles south-east), Princes Risborough (13 miles south-east) and Haydon Hill (8 miles south-east).

Landmarks near Grendon Underwood

For a walk, there’s Upper Ray Meadows.

Map of Grendon Underwood © OpenStreetMap contributors

How the visit works

You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes a few hours, depending on the length of joint in most cases. In a small place like Grendon Underwood, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.

  1. The room is cleared along the joints so we can reach them.
  2. We take out the cracked caulk, grout or old sealant.
  3. We clean and dry the edges of the joint.
  4. We apply a flexible sealant suited to the floor.
  5. We check the joints and explain the aftercare.

Getting ready for the visit

  • Tell us about any water getting in
  • Keep pets and children clear of the area while we work
  • Clear the area around the work

How to get a quote

Want a quote for floor joint sealing? Please call 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear quote before we start.

Get a quick quote

Advice

When something else is needed

Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:

  • Structural movement or subsidence
  • Water getting under the tiles from elsewhere
  • Damaged concrete that needs breaking out and repairing

Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.

Joints and surfaces we work on

  • Tiled floors
  • Wet room & bathroom floors
  • Thresholds
  • Skirting boards
  • Commercial floors
  • Concrete floor joints

Questions from Grendon Underwood

Is Grendon Underwood in your area for floor joint sealing?

Yes. We work across London and the South East, and Grendon Underwood is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.

Is Grendon Underwood within the area you cover?

Yes. Grendon Underwood is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.

What should I tell you?

The location, the problem and the rough size of the job. Photos by email help too.

Can I do it myself?

It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.

Is it messy?

No. We work neatly, protect the area around the joints and tidy up afterwards.

What do you put in the joint?

Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.

Do you take out the old sealant first?

Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.

Can new sealant go over the old?

No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.

Keeping the joints in good condition

Simple care keeps the joints in good condition. Our advice:

  • Have a cracking tiled floor checked before tiles break
  • Avoid sloshing water against skirting
  • Walk round the room once a year and look at the edges
  • Keep dirt out of the joints

Lift furniture rather than sliding it over sealed joints. Sharp edges can cut the sealant especially in the first few days.

Open skirting gaps let in draughts, dust and sometimes insects. Sealing it keeps the room tidier and stops it getting worse.

What the job involves on each surface

Skirting boards

If the skirting is painted, a paintable flexible sealant works well. Where water is involved, silicone is the better choice.

Thresholds

Threshold joints get a lot of feet, so the sealant has to be tough as well as flexible and neatly finished.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job