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Endura Flap Panel Height and Sash Width Extensions

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  • Extension for Endura Flap brand Patio Panels and Sash Windows
  • Part of the anti-whoops design feature on all Thermo Panels and Sashes
  • Gives you an extra 3/4" added to the panel or sash adjustment range
  • Three colors and four sizes to match your pet door

Product Details

Endura Flap Thermo Panel Height and Thermo Sash Width Extensions

These are a part of the exclusive anti-whoops feature included on all Endura Flap patio door and sash window pet doors.

You mismeasured! Now you have to send the pet door back for the correct size. Not so fast! If you purchased a Thermo Panel or Thermo Sash you might be able to salvage the situation by using the "anti-whoops" feature:

  • To make your panel 3/4" taller or your sash 3/4" wider, you may purchase an  extension (or create your own using 1" thick piece of wood painted to match).
  • To make your panel slightly shorter or sash narrower, you may trim the U-Shaped flange up to 3/4" with a metal hacksaw.

If you need a substantially higher or shorter panel that doesn't fall into the standard Patio Pacific height adjustment ranges, then you may purchase a custom height Endura Flap‚ Sliding Glass Pet Door.

Size Chart

Flap SizeFlap DimensionStock Code
Small 6" w x 11" h13PPC06
Medium 8" w x 15" h13PPC08
Large 10" w x 19" h13PPC10
Extra Large 12" w x 23" h13PPC12

NOTE: The size of the height extension is about 3/4 inch. Choose your patio panel pet door size based on the chart above so we can send you the right width. If the height extension of 3/4" is not the correct size, you can also put a piece of lumber in your panel track to extend the height.

FAQ

How do I know if I need to purchase this?

The height and width extensions are made for when you purchase a Thermo Panel that is too small for your doorway. It adds about ¾” extra length to your Thermo Panel. You can also create your own with a 1” thick piece of wood, but it will not be as aesthetically pleasing.

What do I do if the panel I purchased is too tall for my doorway?

If it off by less than an inch, you may be able to saw off length from either the top or bottom of the panel to bring it to size. As long as your Thermo Panel is not a custom length, you can return it within 90 days of purchase. See your return policy for more details.

I have an odd door height. Will this help the Thermo Panel fit into my sliding glass doorway?

Yes, it can! This is great for when your door is between door range sizes. However, if there is more than ¾” difference between the panel size and your doorway, then you should invest in a custom panel insert height.

How do I know what size to get?

You need to order the size that corresponds to the size of your pet door flap. For example, if you ordered a small Endura Flap pet door, you should order the small height extension piece.

Will this affect my door’s insulation value?

It can, but we highly recommend lining the inside of the extension piece with weather stripping to prevent any loss of energy efficiency.
 



Customer Reviews

Endura Flap Panel Height and Sash Width Extensions

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endura flap thermo panel quick panel height extension for sliding glass door patio panel inserts

Size Chart

Flap SizeFlap DimensionStock Code
Small 6" w x 11" h13PPC06
Medium 8" w x 15" h13PPC08
Large 10" w x 19" h13PPC10
Extra Large 12" w x 23" h13PPC12

NOTE: The size of the height extension is about 3/4 inch. Choose your patio panel pet door size based on the chart above so we can send you the right width. If the height extension of 3/4" is not the correct size, you can also put a piece of lumber in your panel track to extend the height.

FAQ

How do I know if I need to purchase this?

The height and width extensions are made for when you purchase a Thermo Panel that is too small for your doorway. It adds about ¾” extra length to your Thermo Panel. You can also create your own with a 1” thick piece of wood, but it will not be as aesthetically pleasing.

What do I do if the panel I purchased is too tall for my doorway?

If it off by less than an inch, you may be able to saw off length from either the top or bottom of the panel to bring it to size. As long as your Thermo Panel is not a custom length, you can return it within 90 days of purchase. See your return policy for more details.

I have an odd door height. Will this help the Thermo Panel fit into my sliding glass doorway?

Yes, it can! This is great for when your door is between door range sizes. However, if there is more than ¾” difference between the panel size and your doorway, then you should invest in a custom panel insert height.

How do I know what size to get?

You need to order the size that corresponds to the size of your pet door flap. For example, if you ordered a small Endura Flap pet door, you should order the small height extension piece.

Will this affect my door’s insulation value?

It can, but we highly recommend lining the inside of the extension piece with weather stripping to prevent any loss of energy efficiency.