What is the difference between warm deck and cold deck roof?
You create a warm roof, or a cold roof, simply by applying the layers of the roof in a different order. In a cold roof, the insulation is applied between the rafters, but in a warm roof, the insulation is applied on top of the existing roof surface.
Can you walk on a warm deck roof?
For a DIY flat roof installation, the warm roof construction method is by far easier, as there is less that can go wrong. This type of construction method is not recommended if you wish to walk on the roof once completed. Because you are effectively walking on the insulation, the roof will feel soft underfoot.
What is cold deck flat roof?
This is known as a cold roof because the roof deck and roof space are close to the external air temperature. It means that the void below the roof deck needs to be well ventilated if condensation is to be avoided. An EPDM rubber roofing membrane is the perfect material to finish off a cold deck design.
Which is best warm or cold roof?
A warm roof is the easiest and most cost effective type of insulation and is an ideal choice for pitched roofs. On some flat roof extensions and balconies, a warm roof would increase the height and isn?t possible, in this scenario you should choose a cold roof insulation.
Why do roofs get warm?
Advantages of Warm Roof Insulation on the entire roof structure keeps all the components in the roof space at the same temperature. Therefore, there is reduced thermal bridging which prevents heat loss from the living room. Houses with warm roofs are less expensive to keep warm than those with cold roofs.
Can you walk on felt roofing?
A flat roof is less precarious than a pitched one, but you still run the risk of damaging the felt and potentially going through the membrane. You?re less likely to cause damage on a warm day, and it?s generally advisable to lay boards across it to walk on.
Can you walk on a membrane roof?
Yes to an extent. EPDM is designed to take LIGHT foot traffic during installation and for occasional cleaning or maintenance. If you require more use than this, i.e. for a balcony then there are additional materials that can be laid over your EPDM for a more durable solution.
How much does it cost to insulate a flat roof?
The lower the U-value the better the insulation properties of the material. To comply with Part L of the Building Regulations 2010, all roofs should be thermally insulated to a maximum U-value of 0.18W/m2K.
Do roofers insulate?
Due to the attic?s close proximity to the roof, roofers can inspect insulation for serious problems. They may notice such things as mold and mildew growth. If your roofer does find an issue, take care it of quickly. And the quickest and most efficient way to do that is to install new attic insulation at that time.
What?s the difference between a cold and warm deck roof?
Warm Deck/Roof ? A warm deck/roof is where the insulation is placed on top of the rafters/joists and the roof covering is then placed over the insulation. No ventilation is required for these types of roofs. Cold Deck/Roof A cold deck roof is where the insulation is placed between the joists/rafters or in
Where is the insulation in a warm deck roof?
This was the traditional way of flat roof construction and as insulation has increased over the years, the warm deck roof is now the commonly used method of construction. The insulation in a warm deck roof is installed immediately below the roof membrane on top of the roof deck, usually with a vapour control layer underneath the insulation.
How is a flat roof similar to a warm roof?
This is a similar construction to the warm roof as insulating above the deck ensures that the structure of the building is warm. There is a growing trend in which a layer of insulation is specified above the deck, whilst the rest is specified below the deck.
Do you need a cold or warm deck?
Good external ventilation is also essential to minimize the risk of condensation in a cold roof.
What is the difference between warm and cool season grasses?
Warm season grasses are varieties that are in active growth beginning in late spring and go dormant in early to mid-fall. Cool season grasses are varieties that are in active growth (?green up?) much earlier in the growing season (mid-spring) and stay green longer into the fall before going dormant in late fall.
What are examples of warm season grasses?
Warm-season grasses include Bermudagrass, St. Augustinegrass, Centipedegrass, Zoysiagrass, Bahiagrass and Carpetgrass. They are often called southern grasses because they grow best in hot summer areas and lack the winter hardiness of the cool-season grasses.
Is ornamental grass seasonal?
Most ornamental grasses planted in the South are classified as cool or warm season plants. Cool season grasses begin new growth in fall or winter and bloom in spring or early summer. They will go dormant or decline in appearance during the summer heat. Most ornamental grasses for the South are warm season growers.
What Ornamental grasses stay green year round?
If you?re a homeowner who is really set on a cool season grass that stays green all year long, don?t worry?there are multiple options to choose from. The most popular of options that can be found throughout many Southern California home lawns is a 90 percent fescue and 10 percent bluegrass seeded blend.
Can you mix warm and cool season grasses?
For most residential lawns, cool-season grasses should never be mixed with warm-season grasses. Doing so results in a very non-uniform, patchwork-like lawn full of differing colors and textures.
Should I plant warm or cool season grass?
Cool season grasses stay green until temperatures drop below 32 degrees F for extended periods and can survive subfreezing temperatures. Warm Season Grasses prefer the heat of southern climates. They grow the fastest during the summer, preferring temperatures between 80 and 95 degrees.
What type of grass turns brown in the fall?
Warm-season grasses like zoysiagrass or bermudagrass turn brown in fall season to prep for winter. As temperatures cool down, warm-season grasses go dormant to protect themselves from winter elements, and then they?re back in action come springtime.
Do all ornamental grasses die in winter?
Most ornamental grasses develop tall seed heads late in the summer that naturally persist through the winter. When temperatures start to drop the plant will die back, leaving the dried foliage, stalks, and seed heads. Many people enjoy the colors and movement that these elements provide in winter.
What kind of grass is a warm season?
Warm season grasses usually do not require as frequent division as cool season grasses. Some warm season grasses include Northern Sea Oats (Chasmanthium), Japanese Silver Grass ( Miscanthus sp.), Hardy Pampas Grass (Erianthus), Perennial Fountain Grass (Pennisetum), Switch Grass (Panicum) and Prairie Cord Grass (Spartina).
When to plant warm season grass in South?
In the Deep South, warm-season grasses are generally grown. These types of lawn grasses grow actively from mid-April to mid-October. As their name implies, they like warm weather. To still have a lawn in winter, Southerners will sometimes overseed with annual ryegrass.
What kind of grass goes dormant in winter?
In the cooler weather of late-fall and winter, they go dormant, turn brown, and won?t green up again until warmer weather returns in spring. The major grasses in this category are bahiagrass, bermudagrass, centipedegrass, St. Augustinegrass, and zoysiagrass.
What kind of grass is best for ornamental garden?
Prairie Cord Grass (Spartina pectinata) Also known as the freshwater cordgrass, this one is basically a native wild grass variety that is slowly getting introduced to ornamental gardening. Extremely hardy in both wet and drought conditions, it needs little care and produces tall, straight foliage with tiny purple flowers growing in summer.