Membrane filters can be used for final filtration or prefiltration, whereas a depth filter is generally used in clarifying applications where quantitative retention is not required or as a prefilter to prolong the life of a downstream membrane. Membrane and depth filters offer certain advantages and limitations.
Concrete Hard-standing-When using concrete as a surface to support your new shed, you must ensure that it is level, flat and that it is dry in time for your shed delivery and installation. Here are the basic steps: 1  Using pegs and string, mark out the base area (allow 5 cm extra).
Make sure the roof structure is sound before you start. But first things first(I know you are keen to start installing roof shingles!), if you are building a shed from scratch make sure the shed frame is square and level before you begin your roof construction. Once all beams are in place, cover with 12 mm (~1/2) exterior-grade plywood sheathing.