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Dave Hammerton's Roofs Print

This is a guide along with my own views on the quality of the new hood and on how I found it to Install. This is on a 1996 Griffith 500 so some of the fixtures on mine may slightly differ to earlier or later cars.

High Quality Roof Material includes 3 layer construction with a rubber water-proof membrane so no need to waterproof again, High Quality Backlight. – Made to Fit - Supplied by David Hammerton for £295 ( for both Pieces ) + Post and Package.

David can be contacted via email  This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

BEFORE
 
AFTER
 

 

Kit Includes

Delivered and well-packaged and protected parcel.

  • Targa Roof Material, Stitched and ready to Install

  • Rear Roof Material, This includes the window and the all stitched ready to install

  • Roll of Double sided  Tape

  • Bottle of Spray on Glue

REAR SECTION


REMOVAL OF OLD ROOF MATERIAL (REAR SECTION)

This is really quite easy and takes no time at all. Remove the Targa Panel.

Firstly you must remove the seal that is around the Targa Hoop. On Mine I didn’t need to change the seal so I just lifted off from the center and working my way to outer edge and left attached to the hoop where they are riveted.

If you are changing the seal you’ll need to drill the rivets out. (These are 4mmm Rivets)


 
 
 
 

Once that’s removed you can lift the material and pull it off the hoop and lift of the Velcro part to the body either side. On mine I don’t have the Elephant ears that are rubber flaps that are glued either side at the bottom of the Targa Hoop. Now mine has never leaked without them and I know of many that don’t have them and many that do so it really is personal preference whether you want to add them or not.

 
 
 
 
 
 

 

Now you need to undo the Rear section from the tension hoop.

This is done by removing the 3 Allen bolts (4mm Allen with 10mm nut on boot side) and 2 pozidrive screws at either end.

The pozidrive screws are easily undone. To remove the Allen bolts you need to access the nuts in the boot. To reach these you need to remove the Covered section above the Petrol Tank. Remove by pulling the left hand side towards you first lifting it around the petrol tank filler neck. You should then be able to pull the rest out by lifting slightly and pulling the bottom edge out first. See pictures below

 
 
 
 
 

Once these are all undone the whole roof can be lifted off and the material removed from the tension bar.

 
 

Make a mark on the underside of the tension hoop and the material where the centre is. There was one on mine all ready. This will be needed later to line up the new material and for making the cuts to the new material.

 
 
 

Once the old material has been removed both the Targa Hoop and the Tension Hoop should have the old Glue removed. Mask the edges on both where they meet the leather with normal masking tape. I then used Evostick Adhesive Cleaner to remove the old Glue. This takes a fare but of time but worth taking time over as to remove any bumps that may pierce or make the material look uneven when attached. I finished by slightly sanding down and then de-greasing.

 
 
 

 

Some pictures showing the new and old hood Together, you may be able to see the new hood has amuch better tighter weave.

 
 
 

I also found when taking my material off some of top edge of the Fibreglass hoop was missing at one edge. It wasn’t on the hood material so I guess had chipped off some other time under another owner. I took this opportunity to put this back to normal and brought some ready mixed Fibreglass putty and made the edge back up See pictures below.

 
 
 
 
 
 

 

PREPING THE NEW HOOD AND ATTACHING


Now to get the New Hood ready to go on. You would have noticed when removing the old hood that the material edge that sits under the tension hoop has to be cut in numerous places so that it will sit around the tension hoop nicely.

 
 
 

To get the new cuts the same as the old I laid the old hood on the new one and then marked the cuts Starting from Centre Line marked on the old Cloth and lining up and making the a new Centre mark on the new material. I then measured the cuts from here from the old material and marked on the new material using a chinagraph pencil .

 
 
 

Once all marked out I noticed that the new material used one less cut than what was on the old one (don’t worry if this is the case with yours as all we line up ok). Now the material can be cut out.

 

 Attaching the Hood


Attach the doublesided tape to the underside of the rear tension hoop and line up the material (matching the centerline on the material to the one made on the hoop). I started from centre and worked my way attaching one side first and then the other, Note it does get a little awkward around the bend and may look very creased but once the tension hoop is attached back to the car this will all come good. Attach the tension hoop back to the car and re-insert the bolts and screws.

 
 
 
 
 
 
 
 

On the Targa hood cut some of the double sided tape supplied and attach on the hoop and the front edge and the rear edges across from the nearside to offside of the car. Now lay on the hood material from Centre out and down the sides. The joy of using the double side tape is that you will be able to play around getting the position correct before gluing.


 
 
 
 
 
 
  

You will need to make a couple of cuts either side at the bend (see pictures) otherwise the material will not bend around the Targa hoop nicely. The Picture on the right below is the old hood on the top of the new to get the cuts right for the curved part of the Targa Hoop.

Tension the Ali Tension Bars and see how the roof material and rear window sits. Taking note that the window should be flat without ripples and at the sides the Velcro will attach to Velcro on the bodywork with no gaps.

If you have got this correct at the first attempt then well done if not don’t worry it normally takes a few attempts to get everything lining up nicely and the Window with out ripples and a nice tension on the tension bars. Also make sure that the lip of material that sits along the bottom edge of the tension hoop to the body sits evenly and against the body.

Once you are happy with the way the hood sits it is now time to glue it.

Un Tension the Ali tension bars and then lift off the front half of material from the Targa hoop. Making sure you have covered everything else that isn’t going to be glued with some old blankets. Remove the double-sided tape and De-grease.

Now with the 3M Scotch Weld Adhesive Spray the Glue (note that if not directed at the target the spray can be sprayed some distance across. Please bear this in mind and make sure you aim well or cover everything apart from the target) onto the Targa Hoop and the underside of the Material. Leave for a few minutes to become tacky and the place back into position starting from the center and working out each way worked best for me and keep stroking the material each way to make sure it sits flat. I then left this for a good hour to dry and also placed the Targa panel back into get a good fit.

 

Now you need to glue the other half of the Targa Hoop. Remove the rear Tension Hoop and then lift then as if turning inside out lift up and over the Targa Hoop. Doing this enables the rear half of material on the Targa Hoop to be lifted. As before remove the Double sided tape

 

De-grease. Glue both the Targa Hoop and the underside of the material again, leave for a few minutes and then attach together. I again left this for some time to bond well.

 

Following the same procedure as before for the rear Tension Bar. Marking the materials position in a number of places will help reattaching in the correct place.  Detaching one half removing the double-sided tape, De-greasing and then Gluing as before and re attaching. Repeat for the other half and leave to bond well before re-bolting to the Car.

Once the Tension hoop has been re-bolted to the car the Ali tension bars can be tensioned and your roof will be complete once the seal has been re-attached around the Targa Hoop.

In My opinion the Material seems to be of a much better standard then the one previously used on my Griffith. The weave is certainly a lot tighter. Time will tell whether the Window is of Better Quality but id does also seem to be of a very good quality.

 
 

Time wise the rear part of the hood from start to finish took me around 7 Hours. This wasn’t rushed and prep’ing correctly and having patience when attaching the new hood are the key to fitting the new hood. I am an Electrical Engineer with no experience of doing this kind of job before apart from re-covering the Targa Panel of my Griffith and would say as long as you are Patient, Methodical and good with your hands many people should be able to complete this project themselves.

Contact for David Hammerton  This e-mail address is being protected from spam bots, you need JavaScript enabled to view it


Simon Powell

 
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