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    Glossary Of Terms

    Glossary Of Terms

    VPSS, SRS, Full Treat, Half Treat ... VR90? What no earth are you talking about?

    All Ventrolla renovation work comes with a 5 year no quibble guarantee and is undertaken by experienced Installers that have been fully trained in the methodology of our unique Ventrolla system.

    We don't subcontract meaning all of our Installers are directly employed by Ventrolla and are CRB checked for your peace of mind.

    Our approach ensures we maintain our high standards and that your beautiful windows will be energy efficient without altering the appearance or historic value of your property.

     

    The Ventrolla Perimeter Sealing System (VPSS)

    Sash windows have a 3mm air gap around the sashes to allow the sashes to slide past each other and operate smoothly. It is this air gap that causes the inherent problems associated with sash windows, such as draughts, rattles, dust ingress and reduced energy efficiency. By installing the Ventrolla Perimeter Sealing System (VPSS) we can eliminate these problems.
    For further piece of mind, VPSS has achieved British Standard (BS 6375:1-2009) and has therefore been tested to withstand winds of over 71mph - so you can be safe in the knowledge that your historic windows will perform just like a modern window.
    Our high performance draught proofing Weatherfin Pile becomes an integral part of your window, installed in our unique parting bead between the sashes, in the new staff beads around the window and installed directly into the mid and bottom rails.

     

    Full Treatment

    (Vertical Sliding Sash, Yorkshire Sliders and Venetian Windows)
    When we renovate your windows, firstly we remove the sashes from the frame allowing us access to the sash box. Then we scrape any loose paint that has accumulated over the years and may be restricting the movement of the sashes. Sash cords are replaced, pulleys serviced and sashes correctly balanced to ensure smooth operation of the windows.
    To accommodate our Ventrolla Perimeter Sealing System (VPSS), grooves are routed into the mid rail and bottom rail of the bottom sash, which makes the seal an integral part of the window. Finally new parting beads and staff beads are installed to complete the seal.


    Half Treatment

    (Vertical Sliding Sash, Yorkshire Sliders and Venetian Windows)
    Similar to our “Full Treatment” above with the exception that only the bottom sash is operable with the top sash sealed shut. The bottom sash will still have our Sash Removal System (SRS) which will help with future maintenance along with our unique Ventrolla Perimeter Sealing System (VPSS), whilst the top sash will be sealed shut using Bartoline Frame Sealant.


    Ease & Adjust

    Similar to our ‘Full Treatment’ described above but without the installation of our unique Ventrolla Perimeter Sealing System (VPSS) or Sash Removal System (SRS). We remove any movable sashes from the frame allowing us access to the sash box.
    We then scrape off any loose paint that has accumulated over the years and may be restricting movement of the sashes. Sash cords are then replaced and pulleys serviced to ensure smooth running, finally sashes are correctly balanced to ensure smooth operation of the windows.

     

    Replacement Sills

    To replace the rotten sill we also replace the lower sections of the sash box lining and outer cheek to remove any underlying rot and ensure the repair will last as long as the original. When the new sill is fully installed we then prime the exposed timbers ready for final painting by others. Our preferred timber for replacement sills is Sapele a durable tropical hardwood

     

    Conservation Joint

    As with the tenon joint repair, the original joint has opened up but has not yet started to rot and remains dry. We apply our VR90 resin to help bond the joint together and then screw through the sash stile into the sash rail, thus restoring the joints structural integrity. Any exposed timber is primed ready for final painting.

     

    VR90 Repairs

    Where rot threatens we will use our patented VR90 timber repair system to preserve as much of the original window as possible. Our unique epoxy resin VR90 is applied and moulded then allowed to set (usually within 15 minutes).
    We then plane and hand finish leaving the repair effectively invisible to the eye. The formulation of the resin is such that the repaired joint or filled cavity will be stronger than the original timbers.

     

    Tenon Repair

    The original tenon joint will most probably have lasted several generations but in recent times will have opened up allowing water ingress and rot to take hold. Firstly we remove any rot from the joint exposing sound timber, then apply our VR90 resin to fill the cavity and bond the joint together. Then we plane and sand the joint and apply a layer of primer to cover any exposed timber or resin. The finished repair will be as structurally strong as the original joint.

     

    Casement Windows (inc. hopper, pivot, doors)

    The windows are overhauled, any paint build up that restricts the operation of the casement scraped away, the hinges are serviced and adjusted to ensure correct operation.
    To accommodate our Ventrolla Perimeter Sealing System (VPSS), grooves are routed in to the inner edges of the casement or door making the seal an integral part of the structure.