Basements and cellars are naturally vulnerable to water pressure from the surrounding ground. If you’re experiencing basement damp in Cardiff or are concerned about water ingress, early assessment can prevent further disruption. Timberwise provides professional basement waterproofing in Cardiff, delivering reliable systems designed to control water and protect your property long term. Our approach is practical, proven and tailored to your building.
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We Cover The Following Areas In Cardiff:
- Cardiff (all districts and suburbs)
- Abercynon
- Aberdare
- Barry
- Beddau
- Blackwood
- Bargoed
- Bridgend
- Caerphilly
- Church Village
- Cowbridge
- Cwmbran
- Dinas Powys
- Ebbw Vale
- Ferndale
- Hengoed
- Llanbradach
- Llanedeyrn
- Llanharan
- Llanrumney
- Maesteg
- Merthyr Tydfil
- Mountain Ash
- Nelson
- Newport (Gwent)
- Pencoed
- Penarth
- Pontllanfraith
- Pontypridd
- Porth
- Porthcawl
- Rhondda
- Risca
- Rhoose
- Rumney
- Senghenydd
- Tonypandy
- Tredegar
- Treherbert
- Treharris
- Treorchy
- Ystrad Mynach
Can’t find your area? Just call our team to see if we cover you, or check our full list of locations here.
Why Choose Timberwise?
Local, Cardiff-Based Team
Our PCA-qualified surveyors and technicians cover the entirety of Cardiff and its surrounding areas, meaning that we can help no matter where you are located.
Certified Property Care Specialists
We are members of the Property Care Association, and endorsed by Which? Trusted Traders, as well as being members of Checkatrade, and Trustmark.
Long-Term Guarantees
To give long-term peace of mind, all Timberwise damp proofing and timber treatments carry a 20-year guarantee, and completed basement waterproofing installations are backed by a 10-year guarantee.
Proven Results in Cardiff Properties
Whether you live in an older terraced home, a modern loft or basement conversion, or a listed building, our local team of surveyors and technicians can help.
What Our Customers Say
Read feedback from homeowners who have recieved a survey from Timberwise
Dry Rot Treatment in a Terraced Property in Cardiff
Client: Domestic Our client, a homeowner in Cardiff, contacted Timberwise to conduct dry rot treatment...
Conducting Damp Repairs in a Herne Bay Flat
Client: Domestic Our client, a homeowner in Cardiff, contacted Timberwise to consult on the condition...
Surveying for Dry Rot and Damp in Llandysul, Wales
Client: Domestic Timberwise was given instructions to survey this property, with a specific request to...
Recent Projects by Timberwise in Cardiff
Dry Rot Treatment in a Terraced Property in Cardiff
Client: Domestic Our client, a homeowner in Cardiff, contacted Timberwise to conduct dry rot treatment...
Conducting Damp Repairs in a Herne Bay Flat
Client: Domestic Our client, a homeowner in Cardiff, contacted Timberwise to consult on the condition...
Surveying for Dry Rot and Damp in Llandysul, Wales
Client: Domestic Timberwise was given instructions to survey this property, with a specific request to...
Dealing With Basement Damp in Cardiff?
Basement damp often appears as staining, flaking finishes or persistent damp after heavy rainfall. In some cases, properties may even experience standing water or repeated flooding.
Your basement is an investment, and when below-ground spaces are plagued with damp, it can seriously disrupt your use of the space. The key to success is not simply blocking moisture, but managing how water interacts with your property.
Local Basement Waterproofing Specialists
As an experienced basement specialist in Cardiff, Timberwise designs waterproofing systems based on how and where water enters the space and what you use your basement for. Every recommendation follows a detailed inspection of construction type, ground conditions and current drainage.
This ensures the system performs effectively under pressure, protecting your space from structural damage.
Drainage Systems & Basement Tanking in Cardiff
To be BS8102:2022 compliant, our basement waterproofing solutions offer both Type A and Type C systems. Basement tanking (Type A) creates a protective barrier to resist water penetration through walls and floors. In suitable properties, this method can provide effective internal protection against moisture ingress.
Cavity drainage systems (Type C) manage and redirect water safely away from the internal structure. Rather than resisting pressure, these systems control it — reducing the risk of damp and flooding over time.
Our surveyors advise whether tanking alone is appropriate or whether a combined system would offer greater long-term reliability.
Whilst we often have same-week availability in Cardiff, it can be dependant on demand. Call 02920 290 558 to speak to us and find the earliest survey appointment that works for you.
Waterproofing costs depend on the cause and extent of the problem in the property. You will receive a written report following your survey that will include a clear quote for any recommended remedial works.
Of course – no matter if you are in the dead centre of Cardiff, or outside the city entirely, our team are going to be able to help. We cover the entire South Wales area, so if you need a survey, just get in touch!
Basements and cellars are naturally vulnerable to water pressure from the surrounding ground. If you’re experiencing basement damp in Cardiff or are concerned about water ingress, early assessment can prevent further disruption.
Timberwise provides professional basement waterproofing in Cardiff, delivering reliable systems designed to control water and protect your property long term. Our approach is practical, proven and tailored to your building.
The best system depends on how water is entering the space. A professional survey determines whether tanking, drainage or a combined solution is most appropriate.
When correctly designed and installed, waterproofing systems can effectively control groundwater and significantly reduce flood risk.
Yes. Our team in Cardiff is PCA-qualified, and Timberwise is endorsed by Which? Trusted Traders. For more information on our different qualifications and endorsements, you can visit our accreditations page here.
Yes, Timberwise offer guarantees on completed work, with different levels of guarantee applied to different types of work.
Damp proof coursing has a guarantee of 20 years, timber treatments have a guarantee of 20 years, and completed basement waterproofing works have a guarantee of 10 years.
For a full list of Timberwise guarantees, and the relevant terms and conditions, visit our guarantee page here.
Of course. Across Cardiff and South Wales we routinely treat Victorian and Edwardian homes, city-centre flats, commercial properties, modern housing and listed buildings. Our team coordinates access with building management and takes care of parking and permit arrangements where required.
Yes, we are ready to work with landlords, estate agents, or anyone within the property chain. We can liase with whoever is in charge of the property to ensure that all works are completed on time whilst minimising disruption for any tenants in the property.
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