Tips To Replace A Flat Roof

(Last Updated On: February 21, 2017)
Replacing a flat roof
Tips to replace a flat roof

Flat roofs are great option for roofing your home but there is one drawback with flat roofs, they cannot be installed in homes which are located in areas with heavy rainfall or heavy snowfall. However if you are already having flat roof that too in such an area then such roof cannot be stable for long period of time. At some or the other point of time, there will be a situation when there will be leak in the roof and your roof will start to damage. Now you cannot stay in a damaged and leaky roof. In such situation, there will be a need to replace a flat roof. Replacing a flat roof can be a difficult task if you are not following the right guidelines but on a contrary it can be really easy if you have followed right tips and tricks to replace a flat roof. To guide you with this subject and help to get the desired result, here is a reliable process and tips to replace a flat roof.

  • What kind of roof you want to install

When you are thinking of replacing a flat roof, you need to start with deciding what will be the new roof you want in your home, The process of replacing a flat roof will start by taking this decision. Basically there are five types and all of them will need regular inspection and maintenance to check whether there is any crack, puncture, tears or cuts. All of the roof for replacing a flat roof will come in roll except single ply membrane.

  • Choose the type of material

Choosing types of roofing materials
Selecting types of roofing materials

While replacing a flat roof, you need to decide what materials you need to accomplish the job. First of all choose the right material and then and then ponder upon how much amount of material you need for replacing a flat roof. The amount of material you need for replacing a flat roof will be based upon the surface area of your roof. Bigger the surface of your roof more will be the amount of material you are going to need. It’s advisable to keep some extra material.

  • Get rid of the old roofing

For replacing a flat roof, you need to remove old roofing first. You cannot install a new roof without removing the old one. You can make use of special scraper or you can even use the square nose spade or even a shovel or any such other thing for loosening the old layer of roofing and removing the old material.

  • Replace the damaged section of the roof

If your old roofing is damaged, then you must check for the damaged portions and see for those low areas as these areas are not going to drain well. You can replace it with roof rafters; they are just like the joists. You will not see much of the pitch or any incline. Roof rafters can also get warp and can also get sag. If there are any sagging rafters then you need to repair it and also deck to stop standing and ponding waters. Certain roofs have drains just like the walls around the roofs and also have drains which are to be kept clean and intact.

  • Install synthetic and wooden strips

It is necessary for a cant strips to have two cuts of 45 degrees and it must be fitted in the inside corner of the surface of the roof. The felt which is used in BUR will not be able to bend at right angles. The cant strips will be able to help in ameliorating the issue.

  • Lay the paper base sheet down

Laying new layer of roofing
Installing new layer of roofing

You need to lay the felt while replacing a flat roof. This felt should be made of polyester or fiberglass or paper which should be saturated with the asphalt. It must be settled down with a 5 to 10 cm of seam or they must be overlapping between the sheets.

  • Fasten the sheets

After you are done with laying the paper, you must while replacing a flat roof; you must fasten up the sheets with thin headed and large roofing nails which should be appropriately spaced for about 8 inches away from the overlapped edges and staggering it elsewhere with 12 inches of gap. You can also do roof nailing at the edge of the roof which must have spacing of 2 inch. After that you must cut base sheet for fitting the vents around in the roof and laying it over the cant strips.

  • Add flashing to the roof

Flashes are those materials which you apply to your vents and also to the other areas for preventing water damage. By doing so, you can protect your roof from the water damage. Another alternative to protect your roof from the water damage is application of plastic roof cement at those particular sites.

  • Install Built up roofing

Built up roofing is allowed in certain places whereas it can also be prohibited in certain spots. Thus while replacing a flat roof, you must check out whether installing BUR is allowed in your area or not. For installing BUR, there must be melted hot tar or even the asphalt coal tar which is also called as carcinogen. Generally LPG gas is used as a source of heat. This is not much good as it contributes towards the air pollution and also toxic, even greenhouse gases are also released at the time of installation. There are certain types of felt which you can use for replacing the roof.

  • Apply the coat of asphalt on the base

You need to lay the layer of hot asphalt with the help of a mop on the base. Once you are done with laying the first row, now you have to lay another row but make sure to leave the gap of 12 inches between first and second row. You can also lay the third layer by leaving a gap of 24 inches if required.

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