1. Can walls be built off Gleeson Precast? Walls can be built off Gleeson Precast slabs in most cases. The type of wall construction depends largely on the span of the slabs. The Gleeson Precast design division will indicate on each customer drawing whether concrete block, lightweight block or studwork partitions are suitable. 2. Are deeper foundations required? Generally foundations are capable of carrying the additional load without changing the design. Piled foundations sometimes require additional design. Please inform your engineer/architect that you are planning to use slabs, as early as possible. 3. Is it necessary to build thicker walls? Wider walls are usually only required where two slabs meet on a wall. Our design division will highlight any requirement for wider walls when producing a slab layout drawing. 4. Are concrete floors more costly than timber joists? Precast concrete floors are slightly more expensive than timber joists, as can be seen from our cost comparsion download, but the benifits far outweigh any additional cost. Gleeson Precast’s special design makes them the most cost effective precast option. Overall cost will vary depending on the finishing method used. Additional costs can be as little as 10%. It has been reported that up to one weeks labour per house can be saved by using Gleeson Precast Slabs, therefore increasing speed and reducing labour costs. 5. Is Gleeson Precast suitable for use on small sized houses? Gleeson Precast slabs have been used on various sites ranging from small semidetached houses to large apartment blocks. 6. When is Gleeson Precast used at ground floor level? Some building authorities recommend use of a suspended slab for structural reasons where depth of fill exceeds 600mm. Generally a suspended slab becomes the cheaper option where depths exceed 900mm. This however is dependent on availability of stone and labour. 7. Are heavier lintels required? Normal 75mm prestressed lintels are sufficient for openings up to 900mm. Openings in slab bearing walls greater than 900mm require superior lintels.Your architect/engineer should however be consulted as this is only a guideline.
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