The blocks come in several sizes but this guide will assume you are using a 16 3 4 inch wide concrete slab.
Roof on a deck built on concrete blocks.
Check out our deck footing frost map to help you understand how deep your footings will need to be excavated.
Each block is design to support a wooden structure at the primary joints acting in the same fashion as a poured concrete foundation.
A free standing roof can be built over a deck paved patio or concrete pad.
Insulated reinforced concrete roof decks the only known roof systems that have consistently survived high category hurricane and tornado velocity winds have been built with structural reinforced concrete decks securely and sufficiently connected to structural reinforced concrete or reinforced concrete block walls.
On aug 26 2009 deck blocks are specially constructed portable foundations generally made from poured concrete.
To support a wooden deck deck blocks are quick and easy alternative to digging footings.
Above ground deck piers are precast tapered concrete blocks with a wide base that are intended to rest directly on the ground or a concrete base.
The steel joists will provide a strong foundation for the flat concrete roofing.
If it is next to a house or structure it should be secured to the siding or roof of that structure as well to keep it stable through high winds and lashing rains.
In many areas an overhead on a concrete slab is allowable if the slab is at least 3 1 2 inches thick and each post can support combined live and dead loads of up to 750 pounds a live load comes from stress exerted by wind people and the like.
One of the most crucial step in building a flat concrete roof is to figure out the size of the concrete block you will need.
When constructing a deck in an area that receives minor amounts to no frost these piers often serve as suitable deck footings.
If the area receives frost the piers can be installed above ground but they normally require additional support underneath.
Step 3 placing the steel joists.
A free standing roof needs to have posts sunk into the ground.
The builddeck floor roofing decking system is a lightweight stay in place insulating concrete form icf made of expanded polystyrene eps and used to construct a solid monolithic insulating concrete floor and or roof decking system.
A patio typically slopes away from the house so that water runs off.
This type of deck can only be made in areas that do not have a deep winter frost.
A dead load comes from the weight of the structure itself.
Spacers let you run sleepers parallel to the house so decking can run perpendicular to the house if that s what you prefer.
You could lay your sleepers directly on the concrete but we bought a 1 2 in thick pvc trim board and cut spacer blocks from it.
