The JKB Window Hook roof platform is a custom built device for hooking onto a dormer window and resting on the roof tiles in order to undertake repairs/maintenance. It saves hundreds of pounds in scaffolding costs and can be stored away in two separate parts after use. Made from stout 18mm exterior grade plywood and sandwiched at the hook in three thicknesses of material, it is screwed and glued together and lacquered with two coats of matt polyurethane varnish and one top coat of yacht varnish. Job done!
The JKB Window Hook platform. Copyright Jeremy Broun 2012
It took longer to design the concept than build it and its hook profile and general angled geometry is made to measure for my particular roof. I had already constructed a roof ladder (see my You Tube WOODOMAIN channel) from a couple of bundles of batten so this is also a very low cost solution for servicing my roof and dormer window. Both sections of the platform are 48" long, conveniently coming out of an eight by four sheet and it makes lifting into position and storage easier.
Looking down on the platform from the dormer window flat roof
There is an extra hitch point where the two holes are to anchor the end of the platform to the dormer roof upright. I used rope but envisage constructing a metal strap that simply hooks into place. The two sections are fixed together in situ with stout stainless steel screws with the larger hole as a viewing hole to locate the screw. Each section is light enough to manoeuvre through the dormer window opening and fix into place on the roof and the hooks amply clear the window sill and flashing if repairs are needed there, which in my case they did.
The platform is made in two sections for ease of mobility and storage
If you are a woodworker/housebuilder who would like to use my idea all I ask for is an acknowledgment or better still buy my Routing DVDs (from WOODOMAIN.com) as a thank you for my ideas. It would cost me too much to patent many of my ideas but I believe in the universal law of what goes around comes around. My device may be featured in a future issue of 'British Woodworking' magazine as an example of resourceful woodworking. I intend doing my own roof repairs for as long as I am active. If you use the idea and make a similar window hook platform I cannot accept any responsibility for its safety, not least because build quality is important. If you are 25 stone heavy obviously the way I have built mine would not be strong enough. Safety always comes first and it is imperative to use an anchored safety harness when working on a roof.