Decks and Green Roof

Decks and patios can be just as important to a house as the main rooms. If properly designed, they too act as rooms of the house. Like interior rooms, they should connect logically to the rest of the house, and to attract people to them, they must be spacious and laid out properly.

The obvious place for a deck is outside the living room to the west. It is easily accessible from the main floor and looks out towards the view. We made it about the same size as the living room, nestled into the corner of the stair tower.

The second natural deck location is the roof of the garage. This temptingly large surface is roughly level with the second floor. Following the Roof Garden pattern, the space is divided into a green roof and a deck. A built in bench provides a nice sitting space. The deck portion was designed lower than the green roof, giving a sense of sitting in the greenery.

Several patterns helped guide our design:

Outdoor Room (163)

• Problem: A garden is the place for lying in the grass, swinging, croquet, growing flowers, throwing a ball for the dog. But there is another way of being outdoors: and its needs are not met by the garden at all.
• Therefore: Build a place outdoors which has so much enclosure round it, that it takes on the feeling of a room, even though it is open to the sky. To do this, define it at the corners with columns, perhaps roof it partially with a trellis or a sliding canvas roof, and create "walls" around it, with fences, sitting walls, screens, hedges, or the exterior walls of the building itself.
• In our home: Both of our decks are designed as outdoor rooms. The main deck mirrors the living room in position and size. It has a railing that feels comfortably enclosing, but still leaves a connection to the wider outdoors. Its placement gives it some of the best views in the house, while directly connecting it to the main social spaces. It will be easy and attractive to move from the living room to the deck when the weather allows. It has a natural gas outlet available so we can use a grill out there in the future.
  
  The upper deck is a private room. It is enclosed by the building wall on one side and the back of the bench on the other. It has a bit of roof overhang to enclose it, too. The location off of the master bathroom and laundry room makes it easily accessible for the family. The bench and green roof make it an attractive place to spend time.

Six-Foot Balcony (167)

• Problem: Balconies and porches which are less than six feet deep are hardly every used.
• Therefore: Whenever you build a balcony, a porch, a gallery, or a terrace always make it at least six feet deep. It possible, recess at least a part of it into the building so that it is not cantilevered out and separated from the building by a simple line, and enclose it partially.
• In our home: The main deck off the living room is about the same size of our living room. It sits in two corners of the house to achieve a recessed feel.
  
  The upper deck is wider but not as deep as the lower deck. It is about 10' deep, including the bench. Being above the garage, it feels tightly attached to the rest of the building.
  
  

Roof Garden (118)

• Problem: A vast part of the earth's surface, in a town, consists of roofs. Couple this with the fact that the total area of a town which can be exposed to the sun is finite, and you will realize that it is natural, and indeed essential, to make roofs which take advantage of the sun and air.
• Therefore: Make parts of almost every roof system usable as roof gardens. Make these parts flat, perhaps terraced for planting, with places to sit and sleep, private places. Place the roof gardens at various stories, and always make it possible to walk directly out onto the roof garden from some lived-in part of the building.
• In our home: The biggest accessible roof space in our house is above the garage. We split that into a roof garden and a deck. The roof garden is a green roof system from GreenFeathers. Plants are grown in modules at the company's nursery for several months. Once the plants are established, they are transported to our house. The modules are placed on the roof, and the liners are removed to connect the sections together. It is designed for our climate and should need almost no maintenance. During the hottest days of summer it will need a bit of hand-watering; but otherwise will take care of itself. We have the largest green roof in the development so far, and we went with some deeper modules. The deeper modules allow larger plants to grow, including some that will turn in to small bushes. There are a variety of plants to provide variation in height, color, and bloom time. The layout includes some terra cotta stones to provide access to all parts of the garden.
  
  The deck next to the green roof provides a sitting (and even sleeping) space. It feels tightly integrated with the plants, placing a garden at your back as you sit on the bench.
  
  The other major part of our roof is the butterfly top. It is not so easily accessible, so we did not add a deck or garden up there. To make it potentially usable space in the future, we ran a conduit from the electrical box to the roof. This will allow us to easily add solar panels on the roof when we desire.

From layout, we moved to materials. Ipe is a popular wood for decks. It is weather resistant, and turns a silvery color over time. Yuval prefers batu. It is also weather resistant, cheaper than ipe, and has a rich red color. The warm color provides a contrast to the cool colors of our house, and Seattle's typical cool, cloudy weather.


No deck is complete without a railing — no safe deck, at least. Like the other houses, we chose a slatted design using the batu. The vertical posts are powder-coated steel. Originally we considered stainless steel. Eventually, we decided to use a darker color to match the interior window trim. That helps to make the posts disappear and lets attention be drawn to the view. For similar reasons, we went with a horizontal strip of batu on the top of the railing instead of a cylindrical steel tube.


We're happy with how the decks and green roof turned out. They are warm, comfortable, and inviting places. We should make good use of both decks (when the weather allows).