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Irish Association Of Self Builders                                         The Representative Body for Self Builders of Ireland


1- Finding A Site 2- Ground Condition 3- Designing Your Home 4- Planning Permission 5- Finding Contractors 6- Site Clearance 7- Foundations
8- Base Structure 9- Drains & Pipes 10- DPC & Radon 11- Ground Floor 12- Wall Structure 13- Cills & Lintels 14- Second Floor
15- Roof Structure 16- Chasing 17- Doors & Windows 18- External Wall Finishes 19- First Fixes 20- Interior Joinery 21- Interior Plastering
22- Second Fixes 23- Snag List 24- Decorating 25- Moving Water Connection ESB Connection Eircom Connection

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Base Structure

This section is done in two parts, the section that is made of cavity walls on top of the foundation and the actual ground floor.

The first section which is a cavity wall is made of concrete blocks on top of the foundation and this wall is erected up to the ground floor level and DPC/Radon section. Do remember that the floor level has to be at least 225 mm above the outer ground. If you are going to use natural stone, bricks or any other exterior finishes, except for plaster you need to make sure that there is sufficient foundation for them and that they start at least 150 mm below the DPC level.

After the walls are done, you have to fill the inside structure of the inner walls. This is usually done by using good quality hardcore material like limestone.

Do not use any cheap material as the floor could subside during time and crack. After the structure has been filled, the hardcore material needs to be compacted by a vibrating plate to insure that there is no chance of movement in the future.

Next a layer of building sand has to be put on to the measure of at least 50 mm. This is done to make sure that there are no sharp edges showing from the fill material which could puncture the damp/radon barrier.

Depending on the type of ground floor you choose, you may not need any fill under it. For example, if you decide to go for a precast concrete or a beam and block floor or hollow concrete slabs, you do not need to make any fill for the underneath.

This obviously has be discussed with your architect/engineer to decide on the type of flooring you will choose for your individual project. Overall, a beam and block floor or Hollow concrete slabs will cost more than the normal poured concrete slab but do remember that if you have a big house and you are more than 900 mm above the ground before the floor is poured, it will be costing you a lot to fill the foundation. So, do your maths and see which one works out cheaper and better.

Do remember to place all your drains and pipes at this stage. Go to Drains/Pipes

Gleeson Precast Concrete Floors

Depending on the type of floor structure chosen, you have to consider the options available on Insulation. This is a very important part of the build and you have to get it right if you wish to keep the house energy efficient and save money on heating.

Hyfloor 150PT is an innovative floor insulation system from Xtratherm

Self Build Insurance

Full Employers
Public Liability and All
Risks cover for New Builds,
Extensions and Renovations
Cover can be taken at
any stage of the project
Very competitive premiums.

Phone 01 897 01 05

Fingal Insurance Group DAC is Regulated by The Central Bank of Ireland

Self Build Direct is the leading insurance policy offering protection to individuals building or extending their homes.

Our cover leads the market and has been developed after assisting 1,000's of self builders over the last 20 years.

Arachas Corporate Brokers Limited trading as Arachas is regulated by the Central Bank of Ireland

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