Capit Building Products Limited - Tel: 01225 791124

Home Up Laying joists Fitting Seals 1 Fitting Seals 2 Blocking in Mortaring in Completion 1 Completion 2 Multiple joists

Fit the seals and extenders: joist height from 225 to 420 mm

For joist heights above 225 mm and up to 420 mm, use a CAPIT joist seal with a CAPIT extender.


With the cap and extender fully telescoped together, place them over the end of the joist so that the rear of the joist cap touches the end of the joist and so that the top of the joist cap rests on the top of the joist.

Then slide the extender down so that the bottom of the extender rests on the blockwork.

Ensure that the side flanges of the joist cap are properly located in the side channels of the extender.

If specified or required, fit twist-and-bend restraint straps ensuring that the straps pass through the notches at the bottoms of the flanges of the joist cap or extender and do not lift the joist cap or extender off the masonry below.

Note: Because the joist cap and extender have an open bottom, there is no need to move the joist in order to fit the cap.

Back Next