Skylight Replacement on Queens Flat Roofs
Skylight replacement by Foundry Roofing covers the whole assembly. We remove the old unit and set a new one on a sound curb, flashed into flat and low-slope roofs on commercial, multi-family and single-family buildings. When you call, we book a visit to measure the opening.
Replacement signs
Leaking, cracked or fogged: is it time to replace?
Match what you see to what failed. When the unit itself is sound, a reseal or reflash of the frame may be all it needs.
| 01What you see | 02What failed | 03Replace or repair |
|---|---|---|
| Leaking around the frame | Worn flashing or curb | Repair may do |
| Cracked or crazed dome | UV-degraded acrylic or polycarbonate | Replace |
| Fog between the panes | Failed insulated glass seal | Replace |
| Constant condensation inside | Old, non-insulated unit | Replace |
| Rotted curb, soft deck at the opening | Long-term water entry | ReplaceWith curb rebuild |
Process
Five steps on replacement day
Apartment buildings, co-ops, condominiums, mixed-use buildings, offices and warehouses make up the bulk of our skylight work.
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Removal
The old skylight comes out and we check the curb and deck below it.
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Curb rebuild
Weak curbs are rebuilt, and where rot reaches the sheathing we redeck that section of the roof.
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Setting
The new unit goes in with its flashing kit.
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Reflashing
Membrane tie-in to the TPO, EPDM or modified bitumen, plus repair of the surrounding membrane where it has aged.
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Finish
Leak testing at the seams, then interior trim repair and cleanup.
New unit
Picking the unit that goes back in
Curb-mounted skylights sit on a raised frame that lifts the glazing above standing water, which is why they suit flat and low-slope roofs. Deck-mounted units fasten straight to the sheathing on pitched roofs. Fixed units admit light only. Venting units open for air, and a roof hatch gives access.
Insulated, tempered glass with a Low-E coating blocks UV and cuts heat loss and condensation. Polycarbonate and acrylic domes cost less, but they yellow and craze in sun. Each new unit carries its manufacturer warranty.
FAQ
Before the old unit comes out
How long does the replacement take?
One visit for a straight swap on a sound curb. A curb rebuild or deck repair adds time, stated on your estimate.
Does the roof around it get opened up?
Yes, a strip around the curb, so the new flashing can tie into the membrane before it is sealed.
Will a new unit fit the old opening?
Usually. We measure the curb at the estimate visit and build a new curb or order a custom size if needed.
What does the warranty cover?
The manufacturer warranty covers the unit and glazing. Terms for our curb and flashing work are written on your estimate.
Free estimate
Tell us about your skylights
Send the skylight count, the building type and whether any unit leaks now, and we will come out to measure and price the skylight replacement.