Terrace sheds · Monsoon

Terrace shed leaking in the rain in Gurgaon: finding the leak and fixing it

Most terrace shed leaks come from four places: the joint where the shed meets the wall, overlaps or joints between sheets, screw holes with perished washers, and a roof with too little slope so water ponds. Fix the flashing and seals first; a shed with the wrong slope or failing sheets needs rebuilding.

Updated 8 October 2026Gurugram & Noida

Polycarbonate terrace shed on a steel frame, sloping away from the wall

Terrace sheds are everywhere on Gurugram's builder floors and Noida's top-floor flats: polycarbonate or metal sheeting on a steel frame, keeping the sun off a terrace that would otherwise hit 45°C. Then the monsoon arrives, and the drip starts, usually right over the spot where you put the sofa. The leak is rarely where the water lands, so tracing it back is the first job.

Leak points, most likely first

The wall joint (flashing)

Where a lean-to shed meets the wall, water running down the wall gets behind the top edge of the sheets. If there's no proper flashing, or the sealant along the joint has cracked in the summer heat, this joint leaks first and worst.

Sheet overlaps and joining profiles

Polycarbonate sheets are joined with H-profiles or by overlapping; metal sheets overlap by a rib. If the overlap is short, faces the wrong way to the wind, or the joining profile's gasket has perished, rain is driven sideways through the joint.

Screw holes and perished washers

Each fixing screw goes through the sheet. It should have an EPDM sealing washer, and in polycarbonate an oversized hole so the sheet can expand. Washers harden and crack in the sun; screws over-tightened crack the sheet around them; holes drilled tight let the sheet split as it expands.

Too little slope, so water ponds

A shed roof needs a fall so water runs off. If it's nearly flat, or the frame has sagged between supports, water ponds and finds every tiny gap. Ponding also adds weight and speeds up sagging.

Open sheet ends and failed sealing tape

Multiwall polycarbonate has hollow channels. The top end should be sealed with an anti-dust tape and the bottom with a vented tape, then capped. Failed tape lets water and dirt into the flutes, which then drip or go green.

Gutter overflow

If the gutter at the low edge is blocked or too small, water backs up under the sheet edge. NCR's dust storms fill gutters with silt right before the rains.

Terrace shed leak finder
Where water appears	Likely source	Fix
Along the wall, back of the shed	Wall joint / flashing failed	New flashing and sealant along the wall
In lines along the roof	Sheet overlaps or joining profiles	Re-seal joints, replace gaskets
Drips at regular points	Screw washers or cracked holes	New EPDM-washered fixings, seal cracks
Water ponds and drips mid-span	Not enough slope or sagged frame	Re-pitch or rebuild the roof
Drips at the lower edge	Blocked or undersized gutter	Clear or upgrade the gutter

What you can check from the ground

On a dry day, run a hose gently on one section of the roof at a time while someone watches underneath. Start at the low edge and work up; the first section that drips is the leak.
Look along the wall joint from below for gaps, cracked sealant or daylight.
Clear the gutter and downpipe from a ladder only if it's safe and the shed edge is reachable. Don't stand or walk on the sheets; polycarbonate and thin metal sheet won't take a person's weight between supports.
Look for sagging between the frame members, which shows as a dip where water collects.

Repair, or rebuild the shed?

New flashing, fresh seals, replacement washers and a cleaned gutter fix most leaks in a shed that has proper slope. Rebuilding is the better answer when the roof is too flat, the frame has sagged, the polycarbonate has yellowed and gone brittle (see polycarbonate sheet yellowing), or the shed was put up with no gutter. A new polycarbonate terrace shed can be built with the right pitch, sealed and vented sheet ends, EPDM-washered fixings and a gutter sized for a Gurugram cloudburst. If you want shade more than full rain cover, an MS pergola is the other route. Read the terrace shed guide for Gurgaon and the terrace shed cost guide for what changes the price. Many societies need RWA consent for a terrace structure, so check before rebuilding.

How FabWise handles a leaking shed

Send photos of the whole shed, the wall joint, the gutter and the spot where water drips, plus a video during rain if you have one, on WhatsApp. If we need to see it, the site visit is ₹99, adjusted against the bill if you go ahead. Shed repairs and new sheds are quoted after the visit; there's no published rate for this work.

Prevention

Clear the gutter after the May dust storms and again mid-monsoon. Hose the roof down gently once before the rains to wash off dust, which holds water at joints. Check the wall flashing and screw washers every year or two. For a covered parking area with the same issue, see car parking sheds.

Browse the sheds and pergolas catalogue, or see sheds and pergolas in Gurgaon. If your shed also rattles in storms, the fixings are the same suspects. Send us a photo on WhatsApp and we'll tell you where it's getting in.

Common questions

Why is my polycarbonate shed leaking?

The commonest sources are the joint along the wall, the joints between sheets, and screw holes where the sealing washers have perished or the sheet has cracked. A roof with too little slope also leaks because water ponds. Hose one section at a time from the low edge up to find the exact spot.

Can I seal a leaking terrace shed with silicone?

Silicone can close a small gap at the wall joint, but it doesn't fix cracked sheets, perished washers or a roof that ponds. On polycarbonate, use a sealant that's compatible with it; some solvent-based sealants damage the sheet. Proper flashing along the wall lasts much longer than a bead of sealant.

What slope should a terrace shed roof have?

Enough for water to run off quickly, not pond. Manufacturers of polycarbonate sheet generally recommend a minimum pitch of a few degrees, and more is better in heavy rain. The exact figure depends on the sheet type and length. A nearly flat shed will leak at every joint.

Terrace shed se baarish ka paani tapakta hai, kya karein?

Pehle dekhiye paani kahan se aa raha hai: wall joint, sheet ke joint, ya screw ke paas. Most leaks are at the wall joint or perished screw washers. Send photos and a video in the rain on WhatsApp, and we'll tell you if it needs sealing or a rebuild.

Do I need RWA permission for a terrace shed in Gurgaon?

Often yes. Many Gurugram societies and some builder floors have rules on terrace structures, and some need permission from the RWA or co-owners. Check before building or rebuilding. Repairs to an existing shed usually don't need fresh permission, but it's worth confirming with your RWA.