Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Closed cell foam cavity retrofit / new windows / vent - order of work?

  • 05-12-2017 9:15am
    #1
    Lumen
    Registered Users, Registered Users 2 Posts: 31,222 ✭✭✭✭


    Have a ~200sqm 1980s detached house with 100/100/100 walls with ~40mm polystyrene sheet in cavity . Am planning on getting closed cell foam injected (Walltite CV100 or similar).

    The windows are original single glazed in hardwood frames.

    At some point I plan to upgrade the windows, ventilation and insulate under (or replace with solid slab) suspended timber floors.

    Does the order I do these in matter much?

    My preference is to get walls pumped first, but then I'll be relying on window installers to maintain air tightness.

    OTOH if I get windows replaced first is there a risk of foam squirting out on the lovely new (probably full aluminium black powdercoated) frames?

    Again with ventilation upgrades (currently have open wall vents, might get DCV inlets in same positions), better done before or after cavity fill?


Comments

  • #2
    kieran.
    Registered Users, Registered Users 2 Posts: 1,175 ✭✭✭kieran.


    With the product you are proposing I would fill the cavity last. In relation to the windows it come down to supervision and workmanship both of which you can control, you need ensure the cavity is fully sealed prior to installing the new windows.

    Also I would recommend that you agree the final payment for the Walltite is subject to a Thermographic Survey, as it on occasion gets blocked off and can form un-insulated pockets in the walls.


Advertisement