Flat roof deck construction details

What is a roof deck in construction?

The roof deck is the roofing material between the structural components (the trusses and joists) and the insulation and weatherproofing layers ( roof materials, coatings, layers, etc.). In short, the roof deck is the section of the roof onto which everything else is placed.

What kind of plywood do you use for a flat roof?

A flat base is required to lay the roof covering on. This can be either Smartply OSB3 or good quality, structurally sound WBP plywood. A minimum thickness of 18mm must always be used.

Do you need planning permission for decking on a flat roof?

Putting up decking , or other raised platforms, in your garden is permitted development, not needing an application for planning permission , providing: together with other extensions, outbuildings etc, the decking or platforms cover no more than 50 per cent of the garden area.

Can I put a deck on my flat roof?

Building a deck over a flat roof is very similar to building a deck over a concrete patio. These decks are often referred to as “floating,” as they are not secured in place as a stand-alone structure. Then, you will install “sleepers” or flat 2x6s laid flat every 16” on top of the roof surface.

Can I turn my flat roof into a roof terrace?

In most cases, an existing flat roof will be used to create a roof terrace . In concrete or steel frame buildings, the existing flat roof is likely to have enough structural strength for a terrace , because the roof is constructed like the floor structures below.

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How much does a 12×12 deck cost?

Cost To Build A Deck By Size

Deck Size Square Feet Average Cost
10×10 100 $1,500 – $3,500
10×12 120 $1,800 – $4,200
12×12 144 $2,160 – $5,040
12×20 240 $3,600 – $8,400

What is a rooftop deck called?

A terrace is an external, raised, open, flat area in either a landscape (such as a park or garden) near a building, or as a roof terrace on a flat roof .

Are roof decks worth it?

Installing a rooftop deck may be well worth the construction costs as most roof decks return almost 150% in resale value. Despite its favorable economic return, a rooftop deck is a major addition and investment. Homeowners can expect to spend at least $25,000 for a basic roof deck setup.

What is the best material to put on a flat roof?

PVC roofing

What is the best material for covering a flat roof?

Ethylene Polypropylene Diene Monomer ( EPDM ) is one of the most versatile rubber roofing options on the market. Considered to be one of the best materials for flat roofs, rubber is a popular choice for industrial and commercial applications thanks to its ability to withstand extreme weather conditions.

Can I use chipboard on flat roof?

Wood particle board ( chipboard ) This type of deck is no longer recommended for use in flat roof applications due to its long term structural instability, especially if contaminated by moisture.

Can I build a deck without council approval?

You may not need council approval , but you may need to comply with laws and legislations set in place by the local government. Adjoining property rights, for example, allow you to build a new pergola, deck or patio so long as it doesn’t interfere with your neighbours or their property.

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Will a flat roof take my weight?

Some live loads for sloped roofs and flat roofs in northern area of the U.S. are rated at 40 pounds of weight per square foot of roof area. So the answer is No unless you are able to spread the load over a large area to keep the load threshold below your live loads allowance.

Do I need planning permission for a raised platform?

Putting up decking, or other raised platforms , in your garden is permitted development, not needing an application for planning permission , providing: The decking is no more than 30cm above the ground. None of the decking or platform is on land forward of a wall forming the principal elevation.