New Roofs & Roof Replacement Merthyr Tydfil
When a roof is beyond economical repair, K Williams Roofing carries out complete new roof installations and full re-roofs across Merthyr Tydfil, in tile, slate or flat roofing systems.
- Free quotes
- Fully insured
- Fast response
- Local roofing specialists
Complete New Roofs Built to Last
A full roof replacement is a big decision. We start with an honest survey of the existing roof and timbers, so you know exactly what you are dealing with before any work is agreed.
From there we help you choose the right covering for your property, whether that's traditional slate, concrete or clay tile, or a modern flat roofing system, and provide a clear, fixed quotation.
We handle scaffold, skip hire and waste disposal as part of the job, so the whole process is managed for you from start to finish.
Our New Roof & Replacement Services
Complete roofing solutions for homes across Merthyr Tydfil that need more than a repair.
Full Tile Re-Roofs
Complete concrete or clay tile roof replacements, built to current standards.
Natural Slate Re-Roofs
Traditional Welsh slate roofs, ideal for period properties across the valleys.
Flat Roof Replacement
EPDM rubber, GRP or felt flat roof systems for extensions and outbuildings.
Roof Timber Repairs
Rotten or damaged rafters and battens replaced before the new covering goes on.
New Roof Insulation
Improved loft and roof insulation fitted as part of your new roof.
Guttering & Fascias
New fascias, soffits and guttering fitted to complete the finished roof.
Roof Ventilation Upgrades
Modern ventilation systems fitted to help prevent condensation problems.
Roof Surveys & Reports
Detailed condition surveys to help you plan and budget for a new roof.
Why Choose K Williams Roofing?
Full re-roofs planned properly and finished to a standard that lasts.
Local Experts
Based in Merthyr Tydfil, we know the local housing stock and valleys weather inside out.
Fully Insured
Comprehensive public liability insurance on every job for complete peace of mind.
Quality Materials
Weather-proven materials from trusted suppliers, chosen to last in South Wales conditions.
Fast Turnaround
Quick quotes, prompt starts and tidy, efficient work with minimal disruption.
Guaranteed Workmanship
Every job is backed by a workmanship guarantee you can rely on.
Competitive Pricing
Fair, transparent quotations with no hidden extras and no pressure.
Signs You Need a New Roof, Not Just a Repair
These are the warning signs that patch repairs are no longer the best option.
Roof Over 25-30 Years Old
Most tile and felt roofs reach the end of their working life in this range.
Repeated Repairs
If you're calling a roofer back every year or two, a full re-roof is often better value.
Sagging Roof Deck
A dip across a wide area usually means the timbers themselves have failed.
Widespread Slipped Tiles
When nail fixings fail across the roof, tiles slip in numbers rather than one at a time.
Daylight Through the Roof
Light visible through the roof structure means the covering has failed extensively.
Rising Energy Bills
A tired roof with poor insulation can be a major source of heat loss.
Recent New Roofs
Full re-roofs from Heolgerrig to the Rhondda and Ebbw Vale, each stripped back and rebuilt properly.
HeolgerrigNew Tiled Bungalow Roof
Bungalow stripped back and re-covered in slate-grey interlocking tiles across every elevation.
View project- Pen-y-Graig, Rhondda
New Tile Roof
A complete new roof in durable interlocking tiles, a little further afield in the Rhondda.
View project 
Ebbw ValeSlate to Tile Roof Replacement
Slipped, delaminating slate stripped off and the roof rebuilt in grey interlocking tiles.
View project
What Customers Say About Our New Roofs
Customers who had complete new roofs, quoted as written.
★★★★★ · Google
“A complete strip off and renewed roof plus a double dormer refurbishment including new flat roof, cladding and insulation. Turned up 8am everyday and worked all day long. Polite, professional and hard working at all times and I have no hesitation in recommending the quality of their work.”
Steve Taylor
★★★★★ · Google
“Kiran has just completed my bungalow roof, a compacted job with hips and dormers. The workmanship is exceptional and all completed in a very short period of time. If you need a professional job at a good price, Kiran is the man.”
Mikey Webb
★★★★★ · Google
“Contacted K Williams about a new roof on Friday, was here by the Monday organising it, came the following week and had it done within a day. Can't believe how quick they did it, and it looks really nice, thanks.”
Gareth Thomas
Our New Roof Process
A clear, managed process from survey to finished roof.
- 1
Free Inspection
We survey the existing roof and timbers and explain exactly what's needed - no jargon, no obligation.
- 2
Detailed Quotation
You get a clear written quote with a full breakdown of materials and labour, and no hidden extras.
- 3
Work Completed
Our local team completes the work to a high standard, on schedule and with the site kept tidy.
- 4
Final Quality Check
We walk the finished job with you, check every detail and leave you with our workmanship guarantee.
Areas We Cover Around Merthyr Tydfil
- Dowlais
- Troedyrhiw
- Penydarren
- Cefn Coed
- Aberfan
- Treharris
- Merthyr Vale
We carry out full re-roofs and new roof installations across Merthyr Tydfil and the surrounding valleys – Dowlais, Penydarren, Troedyrhiw, Cefn Coed, Aberfan, Merthyr Vale and Treharris.
Frequently Asked Questions
Common questions about new roofs and roof replacement in Merthyr Tydfil.
How much does a new roof cost in Merthyr Tydfil?
Cost depends on roof size, pitch, access and the material chosen. We provide a free, itemised quote after a proper survey so you know exactly what you are paying for.
How long does a full roof replacement take?
A typical home re-roof takes one to two weeks depending on size, weather and access – we’ll give you a clear timescale before work starts.
Do I need planning permission for a new roof?
Most like-for-like re-roofs don’t need planning permission, though listed buildings and some conservation areas have extra rules. We can advise on your specific property.
What's the difference between a repair and a full replacement?
A repair fixes a specific problem area; a full replacement renews the whole roof covering, and often the timbers and insulation too, for a fresh start.
What guarantee do you offer on a new roof?
All new roofs come with a workmanship guarantee, alongside manufacturer guarantees on materials used.
Do you offer flat roofs as well as pitched?
Yes – we install EPDM rubber, GRP and felt flat roofing systems as well as tile and slate pitched roofs.
Related Roofing Services
Every service below is part of our complete roofing services in Merthyr Tydfil.
Slating & Tiling Merthyr Tydfil
Slate and tile repairs, re-roofs and new installations across the town.
View serviceStrip & Re-Tile Merthyr Tydfil
Complete strip and re-tile projects with new membrane, battens and tiles.
View serviceRoof Repairs Merthyr Tydfil
Smaller repairs for roofs that don't yet need a full replacement.
View serviceRoof Maintenance Merthyr Tydfil
Ongoing care to help your new roof last as long as possible.
View service
Ready for a New Roof in Merthyr Tydfil?
Get a free, no-obligation survey and fixed quote for your new roof or full re-roof.
Call us today: 07952 811592