In brief
- A low parapet bid often leaves out the flashing, coping joints, drip edge and the blockwork the parapet needs, so water entry at roof edges shows up in the first rains.
- Estimators can expose the gap by asking for a line-by-line breakdown of the parapet, not a single roof-edge figure.
- The municipal engineer's office and a walk around a completed roof in Garowe will tell you more about local practice than the bid document.
Contents
A low parapet detailing bid in Garowe usually misses work rather than doing it cheaply. The parapet is the upstand at the roof edge, and the bid that wins on price often covers only the visible render. Water entry at roof edges then appears after the first Gu or Deyr rain. Ask for a line-by-line breakdown before you compare figures.
What does a parapet detailing bid leave out?
A single roof-edge figure hides the layers that make a parapet work. The upstand needs blockwork or concrete, a movement joint at the corners, a coping with a drip, and a flashing that ties the membrane or sheet into the wall. A bidder under pressure can leave out any of these and still look complete on paper. General practice keeps the membrane turned up the upstand above the finished roof level, with the coping fixed so water cannot run behind it. Confirm the height and fixing detail against the project's specification and the engineer's drawing. Ask the municipal engineer's office whether it holds approved drawings for similar parapets in Garowe, and walk a recent roof to see how the coping and flashing were finished.
Why do unrealistic tender allowances appear in Garowe?
Tender documents invite low prices when they describe the parapet in one line. A bill that says only "parapet to roof edge" gives the estimator nothing to price, so the cheapest reading wins. Add a tight programme and the same crew is asked to form upstands while the roof membrane is still open. Subcontractors may price from a previous job and carry the figure across without checking the current drawing. This is how parapet detailing underbidding risks in Garowe take hold: the gap sits in the tender, not in the workmanship. Ask every bidder to price the upstand, coping, joints, flashing and fixings separately, and to state what the parapet sits on. If a return is silent on one item, treat it as unpriced work and ask for a revised breakdown.
How do you catch a low parapet bid before it is signed?
Compare the breakdowns before you compare the totals. Two bidders may return the same total while one has priced the coping and the other has not. Check the joint layout at corners and any change of direction, because that is where water entry at roof edges starts. Ask for the fixing method and the material of the flashing, in writing, and confirm it against the project's specification. Visit a roof built in the last two seasons in Garowe and look at the coping joints and the drip after rain. If the bid lacks any of these lines, the contract should say how the missing item is priced. Check what your contract allows before you accept or reject a return; do not treat silence as agreement.
What to do next
Ask each bidder for a one-page parapet breakdown: upstand, coping, movement joints, flashing and fixings, each with its own line. Send the same breakdown request to every bidder on the list so the returns compare directly. Walk one completed roof in Garowe after rain, photograph the coping and flashing, and keep the images with the tender file.
Frequently asked questions
Can a low parapet bid still be genuine?
It can, if the bidder has priced every line and is simply more efficient. The test is the breakdown, not the total. Ask for the upstand, coping, joints, flashing and fixings as separate lines and compare those against the drawings.
Who should check the parapet detail before the contract is signed?
The designer or engineer who drew the roof edge should confirm the upstand height, joint positions and flashing method. It is also worth asking the municipal engineer's office which drawings it holds for similar work.
When does water entry at roof edges usually show up?
It often appears during the first Gu or Deyr rains after completion, at corner joints, behind a loose coping, or where the flashing stops short. Checking those points on a roof built in the last two seasons shows what to watch.
Local reporting: this article is written for building work in Garowe and Puntland. Ground conditions, prices and rules differ between places; confirm the details for your own site.