Flat roofs have several advantages, these are cheaper to build than slanted rooftops, this allows you to save some precious pounds upfront, it is also much less complicated to set up, therefore easier to scrutinize than other kinds of roof design. That way you can observe and critique the roof during its construction phase, without fear of sounding ignorant to those who might know more than you. The months of November to March is a time of Christmas, “family and fun” is the name of the game during those cheery weeks, but it also a time when London will be extremely cold, this is when you will truly reap the benefits of a flat roof, this is because flat roofs can absorb heat and spread it throughout your house, warming the entire place and with only half the usual heating required. Not only will you have a crispy, warm house, you will be able to save money in the process! Flat roofs also add value to your home, as you can add more rooms which will serve you a higher selling price.
However flat rooms have many problems and these have to be considered alongside the advantages. Flat roofs can save you in construction but they will also require hefty maintenance, walking on the roof can cause additional strain, especially if they are not designed to hold weight. Many solutions used by London commercial buildings, such as gel membranes are simply too expensive for the average homeowner in London. Flat roofs may have issues with drainage due to their structural design, it does not allow for easy flow of water, and this may lead to problems as rust which could weaken the entire structure.
Visit http://www.londonplanters.co.uk/roofterracedesignlondon.html to get expert recommendations on constructing roof terrace garden in London.
Source : http://gardeningblog.soup.io/post/418633145/What-are-the-Pros-and-Cons-of