Hi chaps
I need to get something to cover over the external stairwell down to my underground room at home. There is a stainless steel frame already in place to take a covering but the previous owners didn't install anything, and we haven't got round to it. Looking now and glass and perspex are prohibitively expensive right now, but the twinwall polycarb sheets as used in greenhouses, conservatories etc are cheap enough and will do the job.
I have one question though when trying to size and buy the right bits, which way round it is used/measured? I would assume the length would be with the box cavities running vertically so any water that collected inside would run down and out, but there's nothing categoric I can find to confirm this.
I'm just wondering whether, given what I need it for, which is just to stop the bulk of the rainwater making its way into the stairwell, that using it horizontally probably wouldn't be a massive issue, but please tell me if I'm wrong.
Also, are there any kind of end caps to blocks up the box cavities that you know of that could stop the water ingress?