Ok so i've made the hole around the waste pipe for the corrugated plastic sheeting but there are gaps what can i use as flashing can you get a pipe boot to go around the pipes ?
Sorry I don't understand what you mean by flat or l shape.
Start on the downslope of the roof and flash up the roof and onto the pipe.
Then come back down again overlapping what you've done.
Round the corners of the flashing to increase pull off resistance and make it look nicer.
Yes you will end up with a black square on your roof that you can see from underneath but nothing you can do about that.
There is bound to be a video on YouTube.
Oh also warm it up really well so it sticks and you mold it.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local