Midlothian · Scotland
New-build mastic & snagging in Lasswade, Midlothian
Our applicators work in Lasswade on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Sealant that never bonded to the surface
- Plot mastic for developers ahead of handover
- Cracks appearing as a new home settles
How we handle new build mastic in Lasswade
If your new home has a leaking shower seal, open skirting joints or untidy sealant, we can help. While the builder’s snagging or warranty period runs, report it to them first. We are often asked to deal with joints pulling apart as timber shrinks and frame joints opening as the plaster dries, on bathrooms & en suites, windows & doors and kitchens.
For a place like Lasswade, the journey and access are planned in advance. Inside work goes ahead in any weather; outside mastic needs a dry day.
There’s a 12-month guarantee on every job.
- Location
- Lasswade (EH19, EH18)
- Wider area
- Midlothian
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What sealant work cannot fix
We’d rather tell you now than do work that will not last, so these are the limits:
- A tray or bath that is not properly supported, until it’s fixed
- Structural cracks in walls or ceilings
- Damaged fittings that need replacing
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think.
Joints and surfaces we work on
- Bathrooms & en suites
- Kitchens
- Skirting & floors
- Plot handovers
- Show homes
- Windows & doors
When to call us in Lasswade
On many sites, sealant goes on in the final rush before handover. Joints are not always cleaned of dust or primed, and the sealant sits on grit instead of the surface.
Signs it’s time to call us include:
- Kitchen sealant that has pulled off the wall
- Shower seals failing in the first year or two
- Sealant that never bonded to the surface
- Gaps between new skirting and floors
If you’ve bought a new home near Eskbank station, the sealant around baths, showers and frames is worth checking in the first year or two.
What your quote should include
- How the colour is chosen
- Is the old sealant removed completely?
- Whether the sealant suits the joint
- Who turns up on the day
What new build mastic looks like in Lasswade
Timber frame is common in newer Scottish homes, and as the frame dries and settles, skirting and sealant joints can open up.
In and around Lasswade, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Lasswade is about 1 mile north-west of Bonnyrigg, in Midlothian. Jobs in Lasswade get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Lasswade is one of 33 towns and villages in Midlothian where we work for new build mastic.
Postcode districts we cover here for new build mastic: EH19 and EH18. Local streets include Green Lane, Church Road and Polton Road, and we cover them all. Being close to the A768, Lasswade is easy for our applicators to reach for new build mastic. We also cover the places around Lasswade: Bonnyrigg (1 mile south-east), Polton (1 mile south-west), Loanhead (2 miles west), Burdiehouse (2 miles north-west) and Rosewell (2 miles south). We also work in nearby towns such as Penicuik (5 miles south-west), Gorebridge (4 miles south-east), Mayfield (3 miles east), Shawfair (3 miles north), Roslin (3 miles south-west) and Easthouses (3 miles east).
Local landmarks in Lasswade
We work in homes and buildings around Public Library and Drum Park and the streets around them. The nearest railway station is Eskbank station, about 1.3 miles east. Well-known places in the area include Cameron Toll Shopping Centre (3.5 miles north-west) and Midlothian Community Hospital (1.1 miles east). The countryside around Lasswade includes Blackford Hill and Duddingston Loch.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Wait for the cure time before using a resealed shower
- Report sealant problems to your builder during the snagging period
- Get a leaking seal dealt with right away
- Avoid running a DIY bead over the old one
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
How the visit works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to several days, depending on the number of plots, and the area is left clean. For a place like Lasswade, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
Ask for a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Related advice
Your questions about new build mastic in Lasswade
Will you come out to Lasswade?
Yes, Lasswade is covered. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you cover Lasswade for new build mastic?
Yes, Lasswade is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and let us know what needs doing.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we’re using and why.
Do you work for letting agents?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels across Midlothian.
Should I go to my builder first?
If you’re still within the builder’s snagging or warranty period, report it to them first. If it isn’t sorted, or keeps failing, get in touch with us.
When is the best time to reseal in a new build?
That depends on the joint. Failed seals in wet areas need doing now, while small cosmetic gaps can wait a while.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Nearby places to Lasswade
Other services in Lasswade
Leave it or put it right?
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. Not sure whether yours can wait? You can drop us a line at info@mrmastic.co.uk with a few pictures and we’ll give you a straight answer. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water behind a failed seal does the most damage when nobody’s watching.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why choose Mr Mastic in Lasswade
- A choice of colours where the product allows
- Neat joints and a tidy finish
- Colour picked to suit the job
- We agree the colour with you first
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed 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.
Quotes for new build mastic in Lasswade
For a quick quote, just ask. The main things that affect it are:
- The old material and how stubborn it is
- Working hours on commercial sites
- The size of the job
- How many areas need sealing
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
Every job is quoted individually, so start by telling us what you need. Simply drop us a line at info@mrmastic.co.uk and describe the job.