Decking laid directly over packed soil will rot quickly and wood laid over concrete rots as well when moisture is trapped between the two materials.
Wood sleepers on roof.
Railway sleepers mardones bpb tucapel 2045 la pintana santiago chile tiemarket5 mardonesbpb cl 562 2836.
Slope the roofing 1 2 per foot and do not then taper the decking sleepers use 1 x or 2x on flat to moer tna double the surface area bearing on the membrane.
The use of wood sleepers to provide rooftop support for hvac equipment pipes and conduit has been a standard procedure for many years the method goes way back to the first days when pipes and equipment first began to be installed on roofs.
3 16 4 8 mm gap between boards.
This is the standard gapping for duralife products.
The sleepers were not fastened to the roof and floated.
Sleepers are placed between the deck surface and the ground or slab below it.
This low slope tpo roof on a public school building in michigan shows the flaws of using wood sleepers and the advantages of solar hvac knuckleheads for pipe supports.
Use standard epdm boot detailing at the posts but you must also fully wrap the posts themselves with a good wrb do you think 1 4 slope is not enough.
A set of sleepers supports the decking and allows moisture and air to flow below it.
Home products wood building products.
In addition the wood will deteriorate and rot from weathering and biological attack.
It s easy to see why.
Whether you want to build railway.
Roof top deck with sleeper system install guide deck must be designed to ensure that proper drainage and air flow are maintained.
These types of walls can be useful structures if installed in areas of different elevation in a backyard.
Loose laid sleepers are subject to movement over time causing pipes to bend and contort.
That was 10 11 years ago haven t heard anything back so i can only guess how it held up.
First they ll install the underlayment perpendicular to the rake of the roof which is correct and will provide the building with a water tight membrane but then many of them will nail continuous horizontal sleepers purlins directly over that waterproof membrane on 24 centers.
I ve noticed that many builders roofers prepare their roof decks for metal roofing in ways that defy logic.
Retaining walls play great roles when properly installed.