How To Refelt A Flat Roof

Roofing felt also called tar paper lays under the shingles of your roof to help keep water out of your home.

How to refelt a flat roof.

How to refelt a flat roof. When installing any type of roof laying down the felt underlayment is always one of the first steps. Any ponding of water will lead to a build up of algae. For hip type shed roofs which include slopes on all 4 sides begin at the square hip at the top of the roof.

However it doesn t usually last much longer than 10 years. This type of flat roof has been used for over 100 years and is generally the cheapest. You will then need to measure the length and width of the roof. Single ply flat roofs are made from one layer of materials that are a bit like rubber.

Follow the 10 steps below in order to felt a flat roof. The top layer is covered with gravel which protects the roof from ultraviolet rays. Then put up osb deck that was screwed down followed by under felt and top felt held in place with clout nails and sealed with bitumen. Flat roofs are not supposed to be built perfectly flat as bizarre as that may sound.

Adjust the felt as you roll it making sure that it s straight with no bubbling. As you roll it out make sure that it remains flat. This underlayment is used as a water barrier and helps protect the roof from leaking. The rolls of felt are quite heavy and to avoid damage must be handled with care.

A friend helped me strip off the old felt and rotten boards. Laying the felt in overlapping layers creates a water. Putting down felt on a flat roof is similar to laying it down on a sloped roof. You can either measure the roof from the ground or by standing on a ladder and actually going up on the roof.

The best time to lay a felt roof using cold applied adhesive is when the weather is warm but this means that working on a flat roof can be exhausting work with the sun s heat and the heat reflected from the felt already laid. Last year i had to re deck and re felt a flat roof garage.