Balcony - flat roof options

KAT68_2

Hi

I've been reading through some past posts about options on replacing a flat roof. Ours is about 15 years old and the boards have gone by the door (it's asphalt) 4.67x2.67m. We have had two roofers round, one has suggested repairing existing asphalt for £580 or removing the old one and replacing a brand new asphalt roof for £1,000. The other company have offered us the GRP (fibreglass option) for £1,100. We are now betwixted and between after doing a bit of research as there seem to be so many options to chose from.

Does anyone have any comments/advice on a asphalt vs GRP option please? Or if there is an even better option. It is a balcony so will be walked on.

We are pretty old school and are worried that with the fibreglass roof we would have a problem if it ever needed to come up for some reason.

Appreciate any comments.

Thanks

Sunnyday

My sister has just had her flat roof done in the fibreglass and is very pleased with it, next year she will have rails installed around the edges to use the area as a balcony with patio doors installed from the bedroom.

We had fibreglass in our previous home (replacement for ashphalt) and again were very pleased, i would choose the same option again. The demonstration of the product included a guy bashing it repeatedly with a hammer :eek: he couldn`t even mark it and this convinced us that it would last for years with no maintainance. The product used for ours was called polyroof as its supposed to allow for any slight movement in the building, not sure what type Dsis had hers done with though.

HTH

SD

iamcornholio

I've no experience with fibreglass systems, but would recommend EPDM be considered too.

Asphalt is best if the roof is subject to regular walking on, but i understand that fibreglass can take foot traffic too. Anything else will require a further walking surface of promenade tiles or decking boards.

In any case, make sure the timber roof deck is thick enough so as not to bow and cause ponding, and the deck has a good fall to drain water away.

Don't forget that this work requires a building regulation application to the council, and needs to be insulated to current standards. Make sure quotes include for this

mini_mad_dad

hi ya,

i install both epdm and grp, the quote you had is a good one for grp if new boards are inclueded. For a bit more the epdm if firestone will come with 20 yr guarentee. the rubber gives more flexabilty, can be repaired and walked on, you can also turn in to a green roof which wil impress most councils. grp can also be walked on and repaired to, the cheaper version dont come with a guarentee. you will be pleased with both grp or rubber which ever you choose. i personally would choose grp if your after a colour (has far bigger range than rubber). rubber shold only cost about 10% more than you been quoted for grp.

hope this helps.

Ionkontrol

mini_mad_dad wrote: »

hi ya,

i install both epdm and grp

How do these stand up against a 3 layer torn on felt roof?