Type of roof for a small extension

[Faz786]

Hi all,
Need some advice. We are getting a small kitchen extension and I want to know if I should go ahead with EPDM roofing. My builder is suggesting not to and go with fiber glass . I am not sure if it is because he has never placed EPDM roofing before

 

[freddiemercurystwin]

Ask him why. Fibreglass is OK provided he knows what he's doing. EPDM is far more forgiving. There's a mahoosive thread on here somewhere with people complaining about their roofs expanding (and making cracking noises) in the heat, I recall it's generally to do with enough fixings of the board into the joists.

 

[freddiemercurystwin]

A

Thread 'Noise from GRP flat roof'

21 Aug 2013

About 3 years ago we had a cold deck flat roof built onto a new extension (approx 35m sq). The roof is constructed of OSB T&G board with a grey GRP coating.

From the outset we have had creaking and banging noises from the roof that coincide with rises/falls in temperature, the problem being mainly restricted to the warmer months of the year.

We have checked the plastic fascia and guttering and even had expansion joints retro-fitted but the problem persists. Windy weather is not a problem (unless it's hot).

Our builder and roofing installer are at a loss what to do next...

• ajs1954
• Replies: 112
• Forum: Roofing and Guttering

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