Specialist Service
Basement Waterproofing
Specialist tanking and cavity-drain waterproofing systems for basements, cellars and lower-ground rooms — installed to BS 8102 standards.
Whether you want to bring an existing cellar back into everyday use, convert a basement into proper living space, or simply protect a lower-ground room from water ingress, getting the waterproofing system right from the outset is essential. JRP Ltd installs both Type A (tanking, using a barrier membrane) and Type C (cavity-drain membrane with managed drainage and pump) systems to BS 8102 standards.
The right system depends on your building's construction, the local water table and ground conditions, and how the space will be used day to day. We'll survey the space, explain the trade-offs of each approach in plain terms, and install to a high standard — with a 10 Year Guarantee (and QANW Insurance Backed Guarantee available) that gives lenders, surveyors and future buyers real confidence in the work.
What's included
- Survey of water source, ground conditions and intended use
- Specification of the right system — Type A, Type C or combined
- The method of preparation will be outlined during the project evaluation stage
- Installation of membrane, drainage channels and sump pump as required
- System testing, 10 Year Guarantee registration and full handover
Warning signs
When to call us
- Damp or visibly wet walls in a cellar or basement
- Standing water appearing after heavy rainfall
- White salt deposits at low level on walls
- Wanting to convert a basement into habitable space
What you gain
Benefits of treatment
- Creates genuinely dry, usable living or storage space
- Can increase overall property value
- Installed to recognised BS 8102 standards
- Choice of tanking or cavity-drain systems to suit your building
- 10 Year Guarantee with QANW Insurance Backed Guarantee available
- Gives confidence to surveyors, lenders and future buyers
Our process
How we work
- 01
Survey
Qualified Assessment to assess the water source, ground conditions and intended future use.
- 02
Design
Specify a Type A, Type C or combined system to BS 8102.
- 03
Install
Prepare the structure and install membrane, drainage and pump as required.
- 04
Sign-off
Test the system, register the 10 Year Guarantee and complete handover.
Common questions
Basement Waterproofing FAQs
Our work
Recent basement waterproofing jobs
1/8Water Proofing
1/9Water Proofing
1/5Water Proofing
You may also need
Related services
Damp Proofing
Eliminate rising and penetrating damp for good. Professional diagnosis, proven chemical DPC systems and a 10 Year Guarantee — from Pembrokeshire's longest-serving damp specialists.
Learn more
Property Surveys
Independent damp and timber surveys with clear, written reports — for homebuyers, owners, surveyors and mortgage lenders across Pembrokeshire.
Learn more
Condensation Control
A survey and advisory service for condensation, damp air and black mould — we carry out a Qualified Assessment to identify the causes, then advise you clearly on the solutions available.
Learn moreRequest a no-obligation survey
Concerned about damp, timber decay or condensation? Send us an enquiry with a few details and we'll come back to you with professional, expert advice — backed by 35+ years serving Pembrokeshire.