Leave us your detail and we'll be in touch

Guarantees provided

Long-term guarantess issued with our work

Highly Experienced

More than 20 years in business

Quality approved

Vetted and checked by our Trade Bodies


Debit and Credit Cards accepted here

Cemplast were very friendly & definitely knows his stuff. Gave advice on other aspects of the house whilst he was here, which was greatly appreciated. House looks so much better than it did before. Would definitely use again.


Job well done, on time and as per quote. Well done Cemplast


Happy with the work. Very friendly, efficient and left everything in a clean state. The surveyor was very approachable and willing to help. Would recommend this company.


The guys contacted me very quickly and were polite, fun and knowledgeable on the phone, which encouraged me to invite them round to quote. They came to see me, gave me great advice and slotted into my busy life. Although they left a bit of a mess (but it was ...


Jamie was very easy to contact and was always available to answer questions, He was able to come to the house swiftly and was immediately able to diagnose the problem and explain what was needed to fix it, he then booked me in for the following week and the job ...


Jamie is easily contactable, very friendly, and was willing to match our cheapest quote. We went with him then as he gave a very good and professional impression.


Couldn’t have asked for a better service. During a complicated house purchase jamie was always available and worked around our timescale. So much so he ended up doing the work on sat and Sunday! Would defiantly recommend!


Did a fantastic job in putting a DPC in ex-walls and have got them coming round again to do some more work too.would recommend they highly as very efficient and easily contactable.


Brilliant job on tanking a wall in my house. I would definitely recommend Cemplast who delivered a reliable, professional service. The job was done within the time specified and completed to a high standard


Job well done, on time and as per quote. Well done Cemplast



This large unused space is a semi underground area. This was unused and unloved for many year, Weinstalled bi fold doors to the rear onto a large garden and this area now boasts a large living area, kids playarea, toilet, utility room and large hallway.

This basement is under a large detached stone built property in Leeds West Yorkshire. It required an XL sump pump as the water table was so high a standard pump just would not cope.


Cemplast Preservation LTD

Basement conversions, waterproofing and damp proofing Specialists In Yorkshire, encompassing Leeds, Harrogate, York, Wetherby, Bradford and all Yorkshire cities

We are Triton approved contractors, which means we are trained and approved in all aspects of waterproofing and damp proofing. This means we are able to provide fully insurance backed guarantees on all waterproofing and damp proofing works. This means you will have the peace of mind that in the event that any problems shall arise all of the works undertaken by Cemplast shall be covered should any trouble; no matter how small or large, shall be rectified.

We pride ourselves on our work and, as they say, the proof is in the pudding. The great thing about cellar conversions is that not one project is the same, every cellar conversion has some aspect that is different, even if they are of the same street. We aim to provide the best solutions to the highest standards that will supply you with that extra space to enjoy for many years to come.

If you dream of extra space, however, do not want to move. Be that through attachment to your area, the cost of moving or any other reason, a basement conversion could give you that all wanted gymnasium, cinema room, kids play area or many other options.

We offer an option to have your basement drawn up in CAD software to provide you with an approximate visualisation of what you can expect from your cellar once cemplast have completed the conversion



Home Owners & Self Builders

Whether you’re an experienced self-builder or a first-timer, we can talk you through exactly which insulation, floor
screed combination suits your project.


Screeding and underfloor heating solutions to meet the needs of older commercial properties, listed buildings or period properties


We work alongside national contractors and can operate within your work schedule, to your specification, or as a consulting partner to provide complete screeding solution.


We consult with the project architects in order to ensure that the complete floor screed installation fits in to the project to the correct specification, on time and in budget.

Lets discuss your project requirements