Adding Gallows Bracket to pre existing GRP Porch

[Nigel Norkett]

I have a large GRP porch on a 10 year old house. Where it's attached to the house wall the lower portion has sagged to the extent I can no longer open the cloakroom window.
I can't find any builders interested in such a piddly little job, so Ive decided to have a go at fixing it DIY style.
I can just about lift it up from below so am planning to fit gallows brackets, recycled plastic, from Toolstation. I have these now and they are great. I will use a couple of props to push it up while I fix the brackets.

What i'm unsure about is how to fix the brackets to the wall. The wall is brick, these bricks are hollow so I know from experience something like anchor bolts wont work.

Has anyone any idea how to attach the brackets to the wall? Thanks in advance, Nigel

 

[foxhole]

Gallows brackets won’t help there why don’t you just adjust the post height they appear to have adjustable bolts of the base? Or add posts to rear.

 

[Harry Bloomfield]

Has anyone any idea how to attach the brackets to the wall? Thanks in advance, Nigel

Drill the holes where you need them, and use resin anchor bolts. You might need extra resin, to fill up the space where you hit a hallow in a brick.